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Old 04-15-2009, 06:35 PM
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Join Date: Jul 2007
Location: USA
Posts: 2,156
stalling issues agian, any suggestions

So the stalling has begun agian. car is a 1991 190E 2.6.what Ive done and replaced:

-new ovp
-reman mas from programa
-Checked fuel pressures-system pressure @ 5.4 bar
-lower chamber pressure at 5 bar
-checked for leaks-none
-checked wiring to eha, micro switch, air flow sensor
-checked air flow sensor
-holds pressure
-checked pcm and wiring to the eha, microswitch and air flow sensor
-checked for vacuum leaks
-checked fuel pumps
-check coolant temp sensor
-checked eha

Also the problem only happens when the reaches operating temp or near operating temperature and when it happens i hear a loud rumbling in the gas tank like there is air in system. it just started doing but for a few weeks the car ran great. seems to me if it was the crankshaft postion sensor it would be doing it when the engine is cold as well.

I worked on it today and found a few red flags. first the fuel pressure didnt change when i performed the decel fuel shut off fuel pressure test and the acceleration enrichment test. The fuel pressure should change when i do this which narrows the problem down to the EHA, control unit, microswitch and TD signal and air flow sensor plate. Out of those items mentioned i elimnated the pcm, microswitch,air flow sensor plate.

Any other ideas as to why its stalling only when the engine is warm and why I am hearing rumbling in the gas tank? Ive done what the MB TSB has you do when you have this issue.

1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

Last edited by Oracle12345; 04-16-2009 at 03:07 PM.
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