OW. Only event that replicates that symptom in my case was a leaky primer pump. Old one bit the dust and I replaced it with a real bosch pump. The old one had been sucking air and not letting me get enough fuel through the IP. When stopped, the prime would be lost, and I could crank it all day to no effect.
clay On Nov 8, 2013, at 5:41 PM, Rick Hawkins Java wrote: > Folks > > I've been having problems getting my 1982 300td to run correctly. And yes > i'm running it on WVO. > > Let's see if i can give some background and tell you all the things that i > have done. > > About 3 weeks ago i drove it 60 miles to atlanta and back and basically > limped home at about 40 mph. > > SO, here's what i did. I drained the tank and checked that the tank screen > was clear. I blew out the tank to prefilter line. I installed a clean > prefilter and also changed the main spin on fuel filter. No improvement. > > Then i pulled all the injectors and pop tested them. Two had a very bad spray > pattern, so i replaced them with tested working injectors. At this point the > car ran pretty well, but was really hard to start. (yes, the valves have been > adjusted in the past 6000 miles) > > It felt like fuel starvation and i started thinking that i have an air leak > somewhere. > > At some point in all this i got a couple of ebay, allegedly Bosh primer > pumps, white box uro, i guess with the Bosch part number. I installed one of > them and didn't like the way it felt, but left it on. > > Then at some point, i went to the flaps looking for a sealing washer for the > main fuel filter .... advance and autozone both had about 3 copper washers, > nothing!! > > I replaced the o ring in the main filter bolt, but didn't replace the > aluminum washer. Mine is the 1 O ring 1 washer style bolt. > > Killed my battery when it wouldn't start and had them charge it for a few > hours. Then i returned and did a lot of priming and got it going. > > Now i'm trying to remember what i did next. I guess i drove it a little and > it felt pretty good. > > At some point in all of this i drilled the T connectors in the main vacuum > hose from pump to booster. After i did that, the key shutoff started working > again. I had been stopping the engine using the lever under the hood. > > I am now starting to think that may have over drilled because the > transmission shifts started to seem like they were a bit too soft. I may have > messed up some restriction orifice in the T. > > This story goes on and on over about a month. I may have some of this out of > chronology but i'm trying. > > On tuesday afternoon, i drove from Athens, GA to near Pensacola, FL, a > distance of about 450 miles each way. I was dragging a 1000 lb letterpress on > the trailer on the to Pensacola. When i started that trip, the rig would > only make about 40 mph, but after a few miles, it picked up and i ran about > 65 most of the way down i-85 and 65. > > I delivered the press and turned around to come back to athens. I only shut > the engine down a few times and it always started ok, but sometimes it does a > strange thing. With a hot engine, i'll try to start it. I'll turn the engine > over WAY too many times it it will not start. THEN i'll try again and it will > start instantly. It does the same pattern every time. > > Now, back to my return trip tuesday night/ wednesday. I went about 200 miles > till i was on the atlanta side of montgomery and the car would slow to about > 40 mph .... then after a while it would pick up and do better, but never more > than about 60. > > I changed the slightly dirty pre filter. I noticed that the new uro trash > primer pump seemed to be leaking, so i put the old bosch one back on and it > seemed to pump better and didn't leak. > > So i limped home and went to sleep. > > On Thursday, i messed with the car some more at the shop. I changed a bunch > of crush washers on banjo fittings on the IP and on the filter body. I > changed the fuel filter bolt with another one i had of the same type. I had > trouble getting it primed again and ran the battery down. After charging it a > while, i got it started and drove home. About midnite last night i started > the car and went to the bank. It didn't run well. Today, i went to start > ..... no joy, i ran out of battery. I went to start my isuzu npr to use it > and i ran out of battery there, too. > > So, i charged the battery for 40 minutes (6 amp charger) and got started and > delivered a 300 lb type case up into the foothills of the mountains in > Dahlonega, Ga a distance of about 60 miles. I didn't shut down and returned > to the office. The car went 60 to 65 the entire way. I returned to the > office. I un hitched my trailer and considered swapping the main vacuum hose > assembly with one on another car, but only thought about it. > > I started the warm engine with the usual over cranking to no result and then > start the second try. I put it into gear and pressed the throttle and had no > increase in RPM on the tach or increased engine sound. The engine has a > slight bit of roughness at idle. With the transmission in park or neutral, i > could rev the engine, but in gear i couldn't get any RPM. I finally got a > little bit of increase in RPM and VERY SLOWLY limped home but it wouldn't > pull much of a hill. I experimented with it a little and could get some > forward motion, but was not able to pull much of a grade. > > It would go fairly well in reverse BUT when was in forward the engine would > not rev up very much. The more i tried to drive it around, the better it did, > but that wasn't very good. > > Do i have a vacuum problem. > > Put on your thinking caps and think about a Mercedes! > > > thanks, > > xx rick > Rick Hawkins > > www.javaphoto.com > www.javacycles.com > LETTERPRESSES FOR SALE > www.ricktheprinter.com > www.letterpressmachinery.com > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
