W124 E420 Bogging - Page 3 - PeachParts Mercedes-Benz Forum

Syntax26 · #31 03-18-2010, 12:46 PM

Quote:

Originally Posted by 400Eric

Buddhists eat cheeseburgers?

Only if the cheeseburger has been soaked in tequila first.

(Something to do with the cow's karma, I think.)

jkazzoun · #32 03-18-2010, 06:05 PM

Well, I had the codes pulled again today.

006 - EE/CC/ISC Control Module N4/1

224 - Idle Speed Contact Switch

jhodg5ck · #33 03-18-2010, 08:27 PM

ETA time...cut open the wire feeding said ETA, see what kind of shape they are in.

Jonathan

jkazzoun · #34 03-18-2010, 08:43 PM

Quote:

Originally Posted by jhodg5ck

ETA time...cut open the wire feeding said ETA, see what kind of shape they are in.

Jonathan

See post 13 - ETA just rebuilt (including new wire harness).

Leaning towards the e-gas module. I'll call 4mercedes in the am and see what they say about the codes. I'm thinking either the e-gas is bad or they didn't do a good rebuild on the ETA (or both).

jkazzoun · #35 05-04-2010, 02:18 PM

So, 4 mercedes says the eta and the egas module are both fine. bench tested and tested in a car. No problems.

So, they are saying most likely it is the starter harness or less likely the asr module.

Thoughts?

jhodg5ck · #36 05-04-2010, 02:25 PM

inspecting starter harness should take about 5 min..yes, Very common.

Jonathan

ohiomike · #37 05-04-2010, 02:57 PM

I had a 400E I spent thousands on for the same problem. It was the throttle and when it was replaced (part was $1200) it was fine after M/B fixed ait leaks they caused.

jkazzoun · #38 06-07-2010, 11:17 AM

Well, after finally getting back my ETA and EGAS module from 4mercedes 9it took 6 weeks for the round trip- ugh!), I went to buy the starter harness from Peach Parts. After looking-up the error codes (above in the thread), I was advised to buy a throtle switch instead (140 545 01 14 ). I figured it was worth a try for $50 (aprox.).

It didn't help, unfortunately. However, if you have to replace yours, check out this incredibly helpful thread - http://http://www.peachparts.com/shopforum/showthread.php?t=142458.

I'll next make another round of calls to gather more ideas. Maybe starter harness next. Have not visually inspected, cannot find. Any tips? A phot would be great. Oh, and maybe I should do a search...

jkazzoun · #39 06-07-2010, 11:48 AM

One more thing, can someone confirm that a)the starter harness is the same as the 'lower harness' and b) it does connect to or interacts with the ETA and/or ASR system somewhere?

Thanks,

jk

deanyel · #40 06-07-2010, 07:04 PM

Yes, starter and lower harness are the same thing, but I don't see how it could have any impact on the ETA or ASR system.

emerydc8 · #41 06-07-2010, 07:51 PM

I agree. By the way, I think the prior owner of my E420 was initially sent a bad ETA from 4Mercedes and he had to send it back for a re-do; so I don't know if I would entirely rule out a bad ETA just because it was rebuilt. I don't have any personal experience with the company.

Also, I think there was someone else on this forum who recently had a "bogging" issue with a 124/119 and it turned out to be a clogged catalytic converter.

Another forum member apparently had a bad ignition coil that caused some bogging.

Good luck.

jkazzoun · #42 06-07-2010, 10:16 PM

I sent it back to them twice - one for the rebuild, one to recheck and rebuild if necessary. They swear they tested it both on the bench and in a car. They also tested both EGAS modules I have and say both are fine.

I was thinking ignition coils as I read forums tonight. I think they were tested, I'll ask the mechanic who would have tomorrow.

Cats were checked by a muffler shop. They said they are fine.

This all started happening right after the a/c was repaired. Likely nothing to do with it, but thought I'd mention it just in case.

emerydc8 · #43 06-08-2010, 03:02 AM

Do you hear any valve pinging when you initially accelerate?

If there is any pre-ignition or detonation (valve ping), the computer will retard the timing--I think by as much as over 20 degrees--and this could cause a "bog" under load.

The pinging can be caused by carbon deposits in the combustion chamber (piston tops and valves) that pre-ignite. Detonation can be caused by a low fuel octane, clogged injectors, bad EGR (the EGR introduces relatively cool air into the engine), over-advanced ignition timing (not likely in your case), defective knock sensor, wrong or bad spark plugs, or fuel pressure under load is too low (check the fuel pressure regulator). I'm sure I left some out of this list.

I had a problem with my 400E where it would bog under a load, but I could hear the pre-ignition noise and I backed off, so I never really pushed it into the higher RPM range; but I know it would have really bogged down (or blown up).

The solution for me was to run 2 quarts of Chevron Techron with a full tank of gas (twice). I don't know if it was a clogged injector or a carbon deposit somewhere in the combustion system that was causing it to pre-ignite, but the Techron was like magic. I started to see a difference within 100 miles and after the second tank, it never recurred.

Maybe you've already tried this. If so, disregard. If not, it wouldn't hurt to try. I would recommend changing the engine oil after running 4 quarts of Techron through the engine, though.

samiam44 · #44 06-08-2010, 09:00 PM

Sorry to hear your still having problems...

Keep after it - Jono seems really knowlegable on these M119's. If you ever want to drop it off here in DFW.. I can give a suggested shop.

I absolutely love my wife's e420.

Michael

deanyel · #45 06-08-2010, 09:40 PM

And you're working another fine testimonial for non-ASR cars.