Hi all,

92 300e 2.6 101k. The car has an intermittent hot no start which generally goes away once the car cools for about a half hour. Second symptom being a rough stumble at idle (car feels like it is running too rich). This symptom occurs when the car first reaches operating temperature and goes away above 1k rpm or so. Ovp, coolant temp sensor, o2 have all recently been changed but didn't change these symptoms.

My guess is EHA but wanted to hear other thought before I start chucking parts. I will likely go junkyard shopping for anymore chuck parts.

BTW fuel pumps run on key turn on hot no start.

Thanks for the wisdom!

fuel pressure is very important, especially with a hot start. throwing parts at it won't fix it until you have some reason to. it could be, and these are suggestions, not repairs, nor would i suggest USED parts in this case, the pressure regulator and/or fuel accumulator. any drop in pressure will cause a hard hot start and these COULD be the culprits. the rich run feel could be extra fuel in the intake from either the injectors and/or the fuel distributor. there should be no fuel in the intake while the engine is off.

the eha will not cause either of these problems. good luck, chuck.

Your injectors are worn and leaking and flooding the engine.

Very common as those cars age.

__________________
Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles

I am starting to think that the injector argument is holding water. The vehicle when left in drive at idle will consistently get loaded up and start to miss and eventually die. If you throw the car in neutral and keep the rpm over 1k all is good with only slight hesitation when back in gear and driving off. When the car is driving down the road there are no symptoms.

Tomorrow I am going to allow the car to Idle in gear till it dies (consistently replicable now) and pull the plugs and see what they look like.

Any other ideas for me to check (EHA, cold start leaking etc.)? looks like I should then pull the injectors out and test them.

Am I making sense on this? Thanks to all for replies.