Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On 6-Aug-06, at 9:19 AM, Marshall Booth wrote: John M McIntosh wrote: I've not checked the air filter, it should be clean, but will confirm, but if it was plugged would one be able to generate 9 psi of boost? As a test just remove the air filter for a single 0-62 mph acceleration run! The turbo can provide more than twice to boost that it's limited to. The only limiting devices limit boost. If there is high resistance to entering air (or low air pressure as occurs at high altitudes) the turbo CAN largely overcome this, but when THAT occurs, full load boost will be shifted to the right when graphed against engine rpm. The boost curve (at full load) should rise from essentially no boost to 8 bar boost between 1200 and 2000 rpm and then remain at or slightly above 8 bar all the way out to 4000+ rpm with just a little droop at the as you reach the 5000+ limit. It's all outlined nicely in 09-0050 of the 602/603 engine manual with graph on page 7. Ok, well considering I've already figured out that the main filter wasn't replaced when the dealer did the initial service, I should have guess they likely didn't do the air filter. Pull air filter housing, nope a Mann product there, looks very dirty, get replacement filter from dealer, has MB part number on it. I'd guess it was replaced at 120K km (53K km, 30K miles ago). Replace, mmm a quick test shows times of 14, versus 14.5+ More testing tomorrow, then I'll use my diesel purge hoses and a gallon of diesel in a bottle and rule in/out issues between the IP and tank. John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 173k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
Jim Cathey wrote: The boost curve (at full load) should rise from essentially no boost to 8 bar boost between 1200 and 2000 rpm and then remain at or slightly above 8 bar all the way out to 4000+ rpm with just a little droop at the as you reach the 5000+ limit. Impressive! The most boost I'm aware of is some of the Cummins rodders that run about 4 Bar into the four-digit horsepower range. (Or was that 0.8 Bar? :-) 800 millibar or 0.8 bar. Not sure how I omitted the 0. but thats the way I sent it. Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
I guess Im going to have to start resoldering these things. Enjoy! The hand cramps and numbness are pleasant, as is working with paint stripper. Hunching over to see close work is also good therapy on the back. I just opened a junkyard unit that had been commercially repaired. Doesn't look like they'd removed the varnish before soldering, it's nasty looking. Not really a job to be proud of, IMHO. -- Jim
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On Sun, 6 Aug 2006, Kaleb C. Striplin wrote: I guess Im going to have to start resoldering these things. Don't forget to re-coat the things with confromal coating when you are done; those old boards are phenolic (at best) which is slightly hygroscopic. In another 20 yrs or so it might become a serious issue on those boards :) (Seriously, when I redid one, I used paint stripper on the back, replaced all the electrolytic and tantalum caps, then desoldered (with a soldapult) every joint and then resoldered with new solder (I prefer 63/37 myself). I then did a flux wash (techspray HFE flux remover) and a test. When it was found to be working, I coated it with techspray Fine-L-Kote UR. It worked great until the car was totaled about 8 mos ago. -j. I dug around and found that I ordered: 1 P2039-ND 15UFD 16VDC TANTALUM CAP 1.14000 1.14 1 P2077-ND 4.7UFD @ 50VDC TANTALUM CAP 3.05000 3.05 2 4240PHCT-ND CAP 63V 10UF ELECT AXIAL .85000 1.70 2 4252PHCT-ND CAP 100V 2.2UF ELECT AXIAL .83000 1.66 1 P5568-ND CAP 22UF 50V ELECT NHG RADIAL .28000 .28 .. This was a CC amp that four axial leaded electrolytics on it and some radials or box tants. FWIW, the Tants are all discontinued.
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
John M McIntosh wrote: Ok, the 0-100 Km times (0-60ish) is 14.5 seconds with ALDA in play, boost pressure is 8 to 9 for entire run, comes on fairly quick The 0-100 km times are 19.5, so 5 seconds slower. Still need to check the speedometer, IP timing and perhaps exhaust backpressure. On 3-Aug-06, at 10:35 AM, Mitch Haley wrote: John M McIntosh wrote: I need to rig up a pressure line/gauge and do some 0-60 runs and observe what is happening for entire runs. Cross check speedometer with GPS Checking IP timing Alter ALDA Alter boost pressure to 12 psi. Run some biocide thru it. Sounds like you confirmed pressure to the ALDA. Next I'd make a run or two with the ALDA vented to atmosphere. If the car doesn't slow down, suspect the ALDA itself or the governor linkages inside the IP. Is the vacuum line from the pump to the vacuum amplifier on the passenger's side of the engine compartment intact? Try disconnecting it (and occluding the vacuum source) and see if that makes a difference. If the filter (62a in the vacuum diagrams) plugs up the vacuum system does some strange things and it may permit the EGR to hang open when it shouldn't. Blockade of the exhaust system (if it has an oxidation CAT) usually occurs VERY quickly and performance become MUCH worse than you report. Is the air filter fresh? A badly plugged air filter (or tank screen) CAN degrade performance the way you describe. Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
Ok, first there was one vacuum line feeding a set of vacuum amplifiers and filter under the air filter which then operated the EGR. I removed that, capped the line and the EGR has no line feeding it for a year now (first thing I did when I got the vehicle). If I apply vacuum to the EGR it opens, release vacuum makes it go clank as the spring shuts the valve. I've not taken it off to check, but it seems functional. There was no air re-circulation valve on the turbo (another feature) on some flavors of 90's diesels. I've not checked the air filter, it should be clean, but will confirm, but if it was plugged would one be able to generate 9 psi of boost? I'll pull the rear carpet and check the fuel tank via the sender. I did add some biocide yesterday because I did note some bugs when I changed out the main filter last weekend. Lastly I'll note the EGR in my 83 300TDt seems frozen (apply vacuum does nothing) not sure if open or closed, that I should look at one day. On 5-Aug-06, at 5:22 PM, Marshall Booth wrote: Is the vacuum line from the pump to the vacuum amplifier on the passenger's side of the engine compartment intact? Try disconnecting it (and occluding the vacuum source) and see if that makes a difference. If the filter (62a in the vacuum diagrams) plugs up the vacuum system does some strange things and it may permit the EGR to hang open when it shouldn't. Blockade of the exhaust system (if it has an oxidation CAT) usually occurs VERY quickly and performance become MUCH worse than you report. Is the air filter fresh? A badly plugged air filter (or tank screen) CAN degrade performance the way you describe. Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired) John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
John M McIntosh wrote: I've not checked the air filter, it should be clean, but will confirm, but if it was plugged would one be able to generate 9 psi of boost? As a test just remove the air filter for a single 0-62 mph acceleration run! The turbo can provide more than twice to boost that it's limited to. The only limiting devices limit boost. If there is high resistance to entering air (or low air pressure as occurs at high altitudes) the turbo CAN largely overcome this, but when THAT occurs, full load boost will be shifted to the right when graphed against engine rpm. The boost curve (at full load) should rise from essentially no boost to 8 bar boost between 1200 and 2000 rpm and then remain at or slightly above 8 bar all the way out to 4000+ rpm with just a little droop at the as you reach the 5000+ limit. It's all outlined nicely in 09-0050 of the 602/603 engine manual with graph on page 7. I'll pull the rear carpet and check the fuel tank via the sender. I did add some biocide yesterday because I did note some bugs when I changed out the main filter last weekend. You can't check the tank screen any way except by REMOVING it. If badly clogged, replacement is usually a better solution than cleaning it. A clogged tank screen really CAN cause exactly what you describe. If you keep the fuel free of water (add a water sequestering agent or anti-gelling agent a couple of times a year and keep the tank as full as possible so there's little air from which water can condense when temps drop below the dew point of the water) and you will NEVER have bugs. Bugs live in the water and eat the fuel. No water - no bugs. From everything you've said there is a small chance the problem is the turbo, BUT I've actually seen or experienced all of the other causes I've listed but have only heard of one or two situation where the turbo really was at fault and never experienced a turbo failure myself (except when pieces of disintegrating trap oxidizer fall into it and jam it stopped). Based on my experience and all the reports I've seen - there about a 1 in 100 chance or less that it's the turbo. Possible but VERY unlikely. Lastly I'll note the EGR in my 83 300TDt seems frozen (apply vacuum does nothing) not sure if open or closed, that I should look at one day. A frozen EGR is no problem as long as it's closed. Only absolute way to prevent it from opening and robbing you of power is to put in a solid plate to block the opening. Measure 0-62 acceleration of your 300TDt and if it's 15 sec or better, the EGR is closed! Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
The boost curve (at full load) should rise from essentially no boost to 8 bar boost between 1200 and 2000 rpm and then remain at or slightly above 8 bar all the way out to 4000+ rpm with just a little droop at the as you reach the 5000+ limit. Impressive! The most boost I'm aware of is some of the Cummins rodders that run about 4 Bar into the four-digit horsepower range. (Or was that 0.8 Bar? :-) -- Jim
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
Jim, You are a stirrer. What do you charge to do a re-solder job on cruise amps. Dennis T The boost curve (at full load) should rise from essentially no boost to 8 bar boost between 1200 and 2000 rpm and then remain at or slightly above 8 bar all the way out to 4000+ rpm with just a little droop at the as you reach the 5000+ limit. Impressive! The most boost I'm aware of is some of the Cummins rodders that run about 4 Bar into the four-digit horsepower range. (Or was that 0.8 Bar? :-) -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.10.7/410 - Release Date: 8/5/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.10.7/410 - Release Date: 8/5/2006
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
What do you charge to do a re-solder job on cruise amps. $40, plus any parts (rare) and return shipping. See: http://cathey.dogear.com/mamerepairs.html -- Jim
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
rumor has it that Jim wrote: The boost curve (at full load) should rise from essentially no boost to 8 bar boost between 1200 and 2000 rpm and then remain at or slightly above 8 bar all the way out to 4000+ rpm with just a little droop at the as you reach the 5000+ limit. Impressive! The most boost I'm aware of is some of the Cummins rodders that run about 4 Bar into the four-digit horsepower range. (Or was that 0.8 Bar? :-) 2 bar is pretty standard for high-output stock motors. I'm remembering 4 bar for big horsepower racing trucks. For fun reading on high-horsepower Cummins, visit http://www.dieselinjection.net/BRUCE/ -- Philip, hot-rodder - with a tired 240D
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
I guess Im going to have to start resoldering these things. Jim Cathey wrote: What do you charge to do a re-solder job on cruise amps. $40, plus any parts (rare) and return shipping. See: http://cathey.dogear.com/mamerepairs.html -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Kaleb C. Striplin/Claremore, OK 91 300D 2.5 Turbo, 90 420SEL, 89 560SEL, 87 420SEL, 87 300SDL, 85 380SE, 85 300D, 84 190D 2.2, 83 300TD, 81 300TD, 81 240D, 76 240D, 76 300D, 74 240D, 73 280SEL 4.5, 72 250C, 69 250 http://www.striplin.net
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
Ok, the 0-100 Km times (0-60ish) is 14.5 seconds with ALDA in play, boost pressure is 8 to 9 for entire run, comes on fairly quick The 0-100 km times are 19.5, so 5 seconds slower. Still need to check the speedometer, IP timing and perhaps exhaust backpressure. On 3-Aug-06, at 10:35 AM, Mitch Haley wrote: John M McIntosh wrote: I need to rig up a pressure line/gauge and do some 0-60 runs and observe what is happening for entire runs. Cross check speedometer with GPS Checking IP timing Alter ALDA Alter boost pressure to 12 psi. Run some biocide thru it. Sounds like you confirmed pressure to the ALDA. Next I'd make a run or two with the ALDA vented to atmosphere. If the car doesn't slow down, suspect the ALDA itself or the governor linkages inside the IP. John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On 29-Jul-06, at 12:53 PM, John W. Reames III wrote: On Fri, 28 Jul 2006, Marshall Booth wrote: A plugged main fuel filter can take a few seconds off the 0-60 time and limit hill climbing capacity and top speed. Paradoxically, fuel economy often suffers as well. Admittedly this was an OM617, but I had a plugged pre-filter that gave me grief; Nope not the pre-filter, that's quite clean. However I did run 2 cans of diesel purge thru it yesterday, I've noticed when I do the 617 the fluid in the jar turns dark, but not in this case, also alas no change in performance. So will grab the GPS and do some testing first to confirm speedo is accurate, then I guess consider if there is an IP timing problem before adjusting the ALDA and or boost pressure. Right now I should run a tank or two and see if the milage changes based on the diesel purge cycle. John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
Hmm. Seems I've been scanning the subject lines in the digests a little too loosely. Can you indulge me, John, and provide a little more detail about this ride? Is it a conversion or what? Any idea as to precise pedigree of the engine? -joe
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
Sure it's a Euro 92 300TDt, OM603 engine etc with 100K miles on it. A year back it had 0-60 times of about 12 seconds. However four fillups ago milage dropped by 2-3 mpg, and noticing it felt sluggish. Testing gave me 0-60 times of 14-15 seconds. So far: a) Replaced main and inline filter, some bugs, but filter had about 30K mils on it. b) Ran two cans of diesel purge. c) ALDA boost pressure shows 9 psi at the ALDA fitting. To do I need to rig up a pressure line/gauge and do some 0-60 runs and observe what is happening for entire runs. Cross check speedometer with GPS Checking IP timing Alter ALDA Alter boost pressure to 12 psi. Run some biocide thru it. On 3-Aug-06, at 7:20 AM, Joe Knight wrote: Hmm. Seems I've been scanning the subject lines in the digests a little too loosely. Can you indulge me, John, and provide a little more detail about this ride? Is it a conversion or what? Any idea as to precise pedigree of the engine? -joe ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
John M McIntosh wrote: I need to rig up a pressure line/gauge and do some 0-60 runs and observe what is happening for entire runs. Cross check speedometer with GPS Checking IP timing Alter ALDA Alter boost pressure to 12 psi. Run some biocide thru it. Sounds like you confirmed pressure to the ALDA. Next I'd make a run or two with the ALDA vented to atmosphere. If the car doesn't slow down, suspect the ALDA itself or the governor linkages inside the IP.
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On 28-Jul-06, at 9:31 AM, Marshall Booth wrote: A plugged main fuel filter can take a few seconds off the 0-60 time and limit hill climbing capacity and top speed. Paradoxically, fuel economy often suffers as well. Ah, well that is interesting how old is that filter, lets see the mb part number on the filter says 0010928401 my part's guy says that been reved 4 times to 6010901652 (MB filter made in South Africa) which makes it kinda old... In looking at the records the 144K km (48K km * 3, or 30K miles * 3) maintenance service was done in a Ford dealership in germany was appears just to have been an oil change. I got it a few km later and had my dealer switch to synthetic oil/ATF etc, however it appears they were misled by the 144K km maintenance service check-off and did NOT replace the main fuel filter, I gave them a pre-filter, but didn't have the main filter handy so they never replaced it. Given that, it could have been done at 96K km, 76K km (or 47K miles) ago, but I wonder... An original part? Mmm might hacksaw apart and see what's inside. Anyway a new filter is on hand for the early Saturday morning task. John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On 28-Jul-06, at 9:31 AM, Marshall Booth wrote: A plugged main fuel filter can take a few seconds off the 0-60 time and limit hill climbing capacity and top speed. Paradoxically, fuel economy often suffers as well. Marshall Ok, changed it, alas the old filter had stamped on the bottom Jan 04 9:02 AM, so it was done in the 140K or earlier timeframe. A slight cloud of alga bugs tho in the fuel out of the filter and the housing was black. I'll add some biocide and see what happens. Very few bugs in pre-filter btw. Double alas, timing runs did not change still +14. John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On Fri, 28 Jul 2006, Marshall Booth wrote: A plugged main fuel filter can take a few seconds off the 0-60 time and limit hill climbing capacity and top speed. Paradoxically, fuel economy often suffers as well. Admittedly this was an OM617, but I had a plugged pre-filter that gave me grief; my wife complained that she was driving the car to work and it acted like she took her foot off the accelerator. Being literal, I wsent and checked out the linkages (lubed them all since none were broken) and cleaned out the ALDA line. Foolishly told her it was resolved. Same thing the next day Well I took it to work (driving I-70), and it was running fine. I get it about 10-15 miles out from the baltimore beltway and it suddenly starts going slower and slower; I could manage about 50mph on a slight downhill (65mph limit, and we won't discuss the actual speed; the troopers seem to run 95+ in the morning) and maybe 35 uphill. I took the first exit and pulled in behind the first 7-11 and popped the hood.. nothing looked amiss until I saw the prefilter was BLACK (solid). I dug into the spare tire well and got my spare out (vise-grips make a good hose pinch tool)... The old prefilter refused to drain since it was so plugged. The car ran much better, though it got a dose of algicide that night and a new main filter, then repeated the prefilter change when it turned black. No problems since. (The car only had about 8k on that prefilter that plugged) -j.
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On 26-Jul-06, at 9:13 PM, Marshall Booth wrote: In my experience almost ALL of the power problems I've seen with OM60x.96 (turbo) engines has NOT been a turbo problem, but accelerator linkage (when the pedal is pushed the floor, the lever on the injection pump MUST move to it's full extent) OR an ALDA set too low (or getting insufficient boost pressure from the intake manifold). Ok, as far as I can tell using a mirror etc, the lever does go all the way to stop pin on the back of the IP, when the accelerator is fully pressed. So I'll swap out the fuel filters next, and ponder a bit. That and do a Y setup to the ALDA and the guage and do some runs to see if anything odd happens to boost pressure. John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
John M McIntosh wrote: On 26-Jul-06, at 9:13 PM, Marshall Booth wrote: In my experience almost ALL of the power problems I've seen with OM60x.96 (turbo) engines has NOT been a turbo problem, but accelerator linkage (when the pedal is pushed the floor, the lever on the injection pump MUST move to it's full extent) OR an ALDA set too low (or getting insufficient boost pressure from the intake manifold). Ok, as far as I can tell using a mirror etc, the lever does go all the way to stop pin on the back of the IP, when the accelerator is fully pressed. So I'll swap out the fuel filters next, and ponder a bit. That and do a Y setup to the ALDA and the guage and do some runs to see if anything odd happens to boost pressure. A plugged main fuel filter can take a few seconds off the 0-60 time and limit hill climbing capacity and top speed. Paradoxically, fuel economy often suffers as well. Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
John M McIntosh wrote: Ok, I was thinking the 90's 300TDt was feeling a bit sluggish. A quick test gave a 0-60 time of 14-15 seconds, mmm A year back I got on the order of 11-12, so something is amiss. In checking the boost pressure, I find at the ALDA no more than 9 psi, normal for what benz seemed to ship at the time. If I disconnect the boost pressure line the acceleration is a bit sluggish, well a lot, and we can't really maintain more than 50 mph up a hill nearby. Well that was the same behaviour a year back, still one would think a non-turbo 300 should do a bit better? I'll take hints and wanted to ask two questions First I'd like to adjust the KKK turbo to bring the boost up to 12 psi, in looking on the web, they all say it's easy, the Garritt is hard and then explain the garritt. So how do you adjust the KKK? Second I'm not sure about the throttle adjustment, the cable to first IP link does travel all the way, but there is a adjustable metal slider assembly that then drives the IP level, I can't find any info on doing any adjustments here other than the nylon screw to ensure the cable is tight. I'll note in the past someone adjusted many things on the pump because they marked each adjustment point/nut with yellow paint. That's not moved, but I wonder if I'm getting full throttle. I realize one can remove the back end of the IP and perform other more radical changes, but somehow I should be able to get back to what it had last summer without resorting to exotic alterations. Lastly I noticed the mpg drop off by 2 mpg over the last 6 tanks. Things I've not check a) main fuel filter b) exhaust issues Clear small filter is clean so I don't think the main fuel filter would be an issue, but I'll replace both filters. In my experience almost ALL of the power problems I've seen with OM60x.96 (turbo) engines has NOT been a turbo problem, but accelerator linkage (when the pedal is pushed the floor, the lever on the injection pump MUST move to it's full extent) OR an ALDA set too low (or getting insufficient boost pressure from the intake manifold). The only test I know of is to see if the boost pressure goes to ~12 psi by 2000 rpm at full load (were the wastegate opens) and remain near there (with the wastegate open) all the way out to ~5000 rpm. If the ALDA isn't set sufficiently rich the boost not only won't go to max by 2000 but may NEVER reach 12 psi and the wastegate may never open. The pressure diagram is located here: http://mb.braingears.com/124_DISC1/Program/Engine/602_603/09-0050.pdf (page 7) Note that it rapidly raises up from 6.5 psi at 1600 rpm to max (12 psi) by 2000 rpm and stays there all the way out (with the wastegate essentially venting any excess boost). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi, '84 190D 2.2 229Kmi (retired)
Re: [MBZ] 90's 300TDt 0-60 times (14 seconds)
On 26-Jul-06, at 9:13 PM, Marshall Booth wrote: In my experience almost ALL of the power problems I've seen with OM60x.96 (turbo) engines has NOT been a turbo problem, but accelerator linkage (when the pedal is pushed the floor, the lever on the injection pump MUST move to it's full extent) OR an ALDA set too low (or getting insufficient boost pressure from the intake manifold). Thank you, in digging around I found section 30-1010 which describes all the throttle linkage adjustments, mind rod 204 is an adjustable slider, versus rod. I haven't confirmed where the control level ends up in relationship to the full load stop, need to wait for daylight. John 1983 300TDt 368k Kilometers (mobil 1 Delvac) 1990's 300TDt 172k Kilometers (mobil 1 Delvac) 1993 500SEL 180k Kilometers (mobil 1 Delvac)
