Re: [MBZ] [MB] Please help me to find another maillist
Check list for KE-Jet vac leaks: Any vacuum operated system (door locks on some models, ACC, EGR, tranny controls, etc). Idle control valve hoses -- if they are hard, they leak (and they are hard unless replaced in the last 5 years or so -- they also split) Injector seals Injector sleeve seals on some cars. Boot between throttle body and air flow meter Worn valve guides. I've replaced everything but valve guides on my 300TE, and guess what? Smooth idle, at long last! Peter
Re: [MBZ] [MB] Please help me to find another maillist
Gents, Two a week ago i had addressed to the mercedeslist.com forum a very simple question about a problem with the Ke-jetronic system in my W124/300E - 91 and received a very small feedback, near nothing. Maybe i'm asking at the wrong place - never knows, but i would like to ask to this gentlemen maillist subscribers if anybody knows a specific maillist about Bosch Ke-jetronic ignition systems, where maybe i can get some help to get rid off the ignition issues i'm facing with this car. Thank you all, RSalles Original message: Hello, My 300E/91 has a very strange problem, after a month or so coming back from the indy: a) Cold or warm, the rpm rises to 1300/1400 rpm by 12 sec., and after that the rpm returns to normal cycle (750rpm). b) Un-pluging a two-wire connector at the idle control valve this symptom stops: no high rpm is observed when the motor is warm. c) Is the auxiliary air valve different than the idle air control valve, or two different names for the same part number? d) Where could the fault be: 1- In a thermo-time switch (must be replaced to be sure?) Where exactly is it in the M103? 2- The fault could be in the ECU? How can it be tested only for this problem? Too many questions, and too basic also, but a really DIY'fer must start with something :) A helping hand would be very appreciated, mostly by the lack of Indy's around my town. TIA, RSalles
Re: [MBZ] [MB] Please help me to find another maillist
The Bosch Fuel Injection and Enigine Management book by Probst (http://www.amazon.com/Bosch-Fuel-Injection-Engine-Management/dp/0837603005/sr=8-1/qid=1164721835/ref=pd_bbs_sr_1/105-4223530-6188429?ie=UTF8s=books) is good - and will help you understand what parts are for what. You will need the tools that David listed as well. -- OK Don, KD5NRO Norman, OK The Americans will always do the right thing... after they've exhausted all the alternatives. Sir Winston Churchill '90 300D, '87 300SDL, '81 240D, '78 450SLC, '97 Ply Grand Voyager
Re: [MBZ] [MB] Please help me to find another maillist
Along with Tom P's suggestions about finding/fixing vacuum leaks, make sure the ignition system is 100% perfect before tinkering with the settings on the injection system. Often people jump to the fuel delivery system when the ignition system is at fault. Good luck - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil PORSCHE POSTERS! youroil.net Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: Potter, Tom E [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Tuesday, November 28, 2006 8:59 AM Subject: Re: [MBZ] [MB] Please help me to find another maillist I would start my troubleshooting by making absolutely sure that all the vacuum leaks are fixed. This is the cause of hunting rpm 90 percent of the time. I just fixed this problem on my granddaughter's Taurus last weekend. I found a vacuum leak at the EGR valve rubber elbow. I would suggest a mechanic's stethoscope or WD-40 to find the leak. Don't forget the oil filler cap and the oil dipstick seals as sources of leaks. Tom Potter -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Brodbeck Sent: Tuesday, November 28, 2006 1:16 AM To: Mercedes Discussion List Subject: Re: [MBZ] [MB] Please help me to find another maillist ... One really basic, but important, item to look for is false air. Any vacuum leak that lets air into the intake without going through the airflow meter will cause idle problems. Common culprits are the bellows at the ends of the intake pipe and the injector seals, but any of the vacuum hoses can cause problems. ___ 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: 7.1.409 / Virus Database: 268.14.17/553 - Release Date: 11/27/2006
Re: [MBZ] [MB] Please help me to find another maillist
the kids are all right here. vacuum, vacuum, vacuum. system gets old and leaky and messed up and makes the CIS-E go nuts. so with the ignition gone nuts, people start to look to the ignition for the solution. but it ain't the first place to look, but maybe the last place to look. slight vacuum problems can cause huge problems for CIS-E. It's a nice system, when it works, but isn't everything nice when it works? On 11/28/06, LarryT [EMAIL PROTECTED] wrote: Along with Tom P's suggestions about finding/fixing vacuum leaks, make sure the ignition system is 100% perfect before tinkering with the settings on the injection system. Often people jump to the fuel delivery system when the ignition system is at fault. Good luck - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil PORSCHE POSTERS! youroil.net Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: Potter, Tom E [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Tuesday, November 28, 2006 8:59 AM Subject: Re: [MBZ] [MB] Please help me to find another maillist I would start my troubleshooting by making absolutely sure that all the vacuum leaks are fixed. This is the cause of hunting rpm 90 percent of the time. I just fixed this problem on my granddaughter's Taurus last weekend. I found a vacuum leak at the EGR valve rubber elbow. I would suggest a mechanic's stethoscope or WD-40 to find the leak. Don't forget the oil filler cap and the oil dipstick seals as sources of leaks. Tom Potter -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Brodbeck Sent: Tuesday, November 28, 2006 1:16 AM To: Mercedes Discussion List Subject: Re: [MBZ] [MB] Please help me to find another maillist ... One really basic, but important, item to look for is false air. Any vacuum leak that lets air into the intake without going through the airflow meter will cause idle problems. Common culprits are the bellows at the ends of the intake pipe and the injector seals, but any of the vacuum hoses can cause problems. ___ 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: 7.1.409 / Virus Database: 268.14.17/553 - Release Date: 11/27/2006 ___ 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
Re: [MBZ] [MB] Please help me to find another maillist
OK Don wrote: The Bosch Fuel Injection and Enigine Management book by Probst (http://www.amazon.com/Bosch-Fuel-Injection-Engine-Management/dp/0837603005/sr=8-1/qid=1164721835/ref=pd_bbs_sr_1/105-4223530-6188429?ie=UTF8s=books) is good - and will help you understand what parts are for what. You will need the tools that David listed as well. That's an excellent book. This is actually a pretty simple fuel injection system, so don't let it intimidate you. I think the key things to remember are: 1. Do all the normal ignition tune up stuff before you try to troubleshoot the fuel injection. Spark plugs, wires, distributor cap. Also replace all the vacuum hoses if they're old and cracked. Make sure the valves are adjusted right if your engine doesn't have hydraulic valve lifters. 2. Test, *then* adjust. Never touch any adjustment without verifying the components are good, first. For example, trying to adjust the base mixture when the real problem is incorrect fuel pressure will only make the car run worse. When people get into trouble with K-Jetronic, it's usually because they try to compensate for some other problem by tweaking it a little. 3. If something really *is* off, don't be afraid to fix it. For example, if the book says the airflow sensor plate needs to be centered, and yours isn't, center it. Small stuff can make a big difference in the way this system runs, and almost all of the possible repairs are simple. Idle problems, in particular, often don't have any one cause. For example, I had an idle problem on my VW Cabriolet, and there was no one thing I did that fixed it. It gradually got better as I went through the whole system and set everything right. This can be kind of frustrating, but it's also satisfying when you finally get it. Very few indys work on K-Jet much anymore. With a little effort you'll probably have a better grasp of how it works than your mechanic does, and you'll save yourself a bundle on diagnostic fees.
Re: [MBZ] [MB] Please help me to find another maillist
Yeah I'm working my way through the Probst book at the moment, however to test a jetronic system you need a fuel pressure test kit with two gauges to see the difference between the fuel pressures in the system. - Original Message - From: David Brodbeck [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Wednesday, November 29, 2006 5:22 AM Subject: Re: [MBZ] [MB] Please help me to find another maillist OK Don wrote: The Bosch Fuel Injection and Enigine Management book by Probst (http://www.amazon.com/Bosch-Fuel-Injection-Engine-Management/dp/0837603005/sr=8-1/qid=1164721835/ref=pd_bbs_sr_1/105-4223530-6188429?ie=UTF8s=books) is good - and will help you understand what parts are for what. You will need the tools that David listed as well. That's an excellent book. This is actually a pretty simple fuel injection system, so don't let it intimidate you. I think the key things to remember are: 1. Do all the normal ignition tune up stuff before you try to troubleshoot the fuel injection. Spark plugs, wires, distributor cap. Also replace all the vacuum hoses if they're old and cracked. Make sure SNIPPED
Re: [MBZ] [MB] Please help me to find another maillist
Hendrik Riessen wrote: Yeah I'm working my way through the Probst book at the moment, however to test a jetronic system you need a fuel pressure test kit with two gauges to see the difference between the fuel pressures in the system. Actually, one gauge and a valve will work. The valve lets you isolate the control pressure regulator from the system. Close it and you read system pressure, open it and you read control pressure. J.C. Whitney sells a CIS gauge set that has all the adapters you need. I'm generally pretty skeptical of J.C. Whitney stuff but this seems pretty well made (in the U.S.A., no less.) It even includes a bleed valve for purging air out of the gauge lines.
