I have just spent the better part of the day, today, testing my stalling problem; I am quite disappointed to report that it still exists on this, the eve of my 36th birthday.

I am, once more, at a total loss as to the cause of this most elusive and frustrating problem.

The saga continues... someday, it will be solved!

Scott,
Sorry to hear the problem is still present. I was wondering if there is any way for you to read the engine management data live with a scanner. I have done some work w/ ECU's in the past on both race and street cars and have often found problems by viewing data live or recorded. I know that on Hondas I have worked on we have been able to watch channels live to chase intermittent problems.

On the race stuff we just used our logging equipment to chase engine problems with some creative wiring. I am no software guru, but am familar with some of the racing datalogging equipment (Pi,Motec) and depending on how desperate you are you could hook up a system to your street car to isolate the cause of the problem. I is possible to pick up "obsolete" Pi systems for reasonable $ and they will log whatever you may like! The only limits are logging frequency which is $ dependent.

Well, I know this offers little in the way of a solution, but it could help in diagnosis.

Andy

You also might want to talk with Shanta about her car. She had the problem solved until swapping airboxes, then it returned. Is there some way to clear the computer's memory and make it "re-learn" with your different airbox? I also like the idea of getting "live data", if there is any way possible to do that!

I am 100% confident that my stalling problem is not airbox-related; as noted earlier in this (lengthy) thread, it predates (by many months) the introduction of my larger volume airbox.
In fact, I have tested a total of 4 different airboxes, to date, with the same (bad) results: OEM, PAD, RENNtech, and Feather Carbon.

As such, I will proceed with trying to capture live data via a logic analyzer-eque approach; thanks to all for their ideas/advice.

Scott, the idea of getting live data is a good one, and maybe not so difficult. Imagine something like - a Mercedes Star diagnosis system on a ThinkPad, which would take care of the data requirements, while the car is running on a roller dyno, with the front wheels placed on something like wheel alignment swivel plates or some sort of heavy-duty lazy Susans which would allow you to turn the front wheels.

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Mark Stetson
1995 E320 Wagon Moonstone Grey/Parchment 106K mi.
2007 E63 AMG Graphite/designo 75K mi

had the same problem with my 400e. It was an easy solution on mine, hopefully yours as well. On the throttle cable, which is behind the engine, there is a plastic clip on the cable near the drivers side. As you turn this clip, it pulls the throttle to adjust the idle rpms. You can turn it too low and stall it out and turn it up to about 900 rpms. If it is too loose, this may be your problem. Try tightening up this thing and see if it fixes it. Im guessing that when you are making sharp turns, your foot is not on the gas peddle, and you are just letting the idle make you go forward. Because the engine is getting no gas, and the idle is set too low, you stall out. Try this and see if it fixes the problem.

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1993 400e
Charlotte

Yeah, my stalling problem is solved, once again. :p

SWEET! What was the cure the second time? Last I heard stalling came back when you put in the new airbox, and you were going to attempt a computer reset, or swap chips, hire a priest to perform an exorcism, etc...

....which reminds me, I was bummed to read the negative comments about the RENNtech chip on Scott's forum. I mean, you'd think those guys could make a chip that works at idle & low RPM too, wouldn't you? Especially considering the outrageous prices they charge? **shakes head in disgust**

RENNtech's LH-EPROM is not to blame... I am 1000% confident; neither is the airbox the culprit in this equation.

(Again,) I have tested this variable, exhaustively (5x over), for 2+ years: take it or leave it.

Second-hand smoke KILLS (so I suggest certain remixers blow it elsewhere)...

No no no, sorry, I wasn't clear. I meant that on the Ecstasty forum, there were some separate posts about how the aftermarket chips seem to make top-end power gains while sacrificing idle quality and low-RPM power... also causing stumbling, misfires, etc that went away when a stock chip was reinstalled. Didn't mean to infer that any chip was the cause of your ongoing stalling problem. It's just that I was expecting a ~$500 chip to work BETTER than a stock chip, not WORSE! I'm disgusted that they sell them without making that clear - I mean, for track use, it's probably fine since you're always in the powerband, but for street use, no way!

Oddly, Shanta's stalling issue went away when the stock airbox was reinstalled - bizarre. I think your stalling issue is due to something else since you've extensively tested various airboxes & chips. But I'm stumped at this point.

Best regards,

yup-yup...:p

Put stock in no stall, put modified one in...stall. Easy to test.

Hey Scott and all who have provided Ideas herein,

This thread has been invaluable in diagnosing my own, similar problem. Many on this board have contributed ideas and support through email, on the phone and, in one case, a spare 500e to swap components. I'm sure I'm forgetting one or two but here goes: Shanta, John, Donnie, Bergwerks, Tom, Phil.

My stalling problem started when the timing chain was replaced. After six weeks of trial and error, many small sensors, the idle control valve, all vaccum hoses, a wiring harness and a Mass Air Flow Sensor, all of which needed replacing anyway, we reinstalled the chain and "de-glazed" the Cam Position Sensor tabs on the driver side cam. Car runs like never before and my thoughts of moving to a 540i Sport have vanished into thin air!

Regards,

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RJ
'92 500E
'75 Triumph TR 6

deglazing????-- what do you mean?
trying to track dow my own stalling problem.
thx,
reinhard

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E 240 2000
E 320 Coupe

I believe all he did was clean off the contact points which had become coated in oil.

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RJ
'92 500E
'75 Triumph TR 6

Hello, again!

I have just replaced my EZL (ignition control module) with the European market (W124.036) part # equivalent.

Although my car runs like a top, it STILL stalls.

At this point, I am hoping to custom-make/tweak an LH EPROM which has a default idle speed value trimmed to 600-650RPM. I am 100% certain this will solve the problem (as acceleration is the only way to prevent the stalling).

http://www.500ecstasy.com/forums/showthread.php?t=1129&page=1&pp=15

Stay tuned (ad nauseam)...