PeachParts Mercedes-Benz Forum - View Single Post - Worked on 300E, now it stalls with idle valve connected!

pawoSD · #4 12-12-2008, 05:04 PM

Quote:

Originally Posted by Oracle12345

" I need your email for those docs btw"

"Did you read Lyle's docs, they explain much of each components functions?"

Never got his email addy so I figured he didnt want them anymore.

But your stalling problem is the reaction of the pcm taking the inputs of all the sensors and devices and taking that information and making adjustments to the A/F mixture. its apparent that one of your sensors or part of your fuel injection is malfunctioning.

"thermostat (runs too cool)" is heading in heading in the right direction because if the thermostat is not working properly it will the pcm to run rich and stay in an open loop when the system should be in a closed loop.

Did you pull your plugs and see the color of them?

I figured its a sensor issue, but I am not sure what all sensors it is looking at (how many are there that play a role?).....one is brand new, and the other is known bad...I'll replace it sometime in the near future. It runs sliiightly rich, but not real bad. Exhaust looks clean but has a slight rich smell to it....much better than it used to be though. Spark plugs have been replaced with the correct non-resistor Bosch. Old plugs were junky champion resistor style, they were a bit oily and dirty (as was expected)....but the engine does not burn/lose any oil. I've driven it nearly 1000 miles since its oil change (M1 0w40) and it has not lost any.

The thermostat could explain the slightly rich running, but not the cold start issue.....as its cold anyways. At running temp right now it hits about 67-69C or so.....tomorrow I'll fix that.