gbvette98

I have a '89 300e (109k miles) (fuel injected) that is flooding itself out. (It will start up and stall after about minute and then won't start until the next morning when it dries up) I have also pulled the plugs and watched the gas spray out of the plug holes while cranking it to prove its flooding.

I have replaced the fuel pressure regulator and OVP. The cold start valve has been bypassed to rule to out as the problem. I believe the fuel pump relay is fine as it is pumping The idle control valve is working fine. I'm down to I have pulled out the distributor but not to sure on how to diagnose if it is working properly. I have also read about the EHA valve but sure how to diagnose that as well. I also noticed there is an electrical plug/sensor of some sort under the distributor connected to the block that is connected to the intake manifold. Not sure what that is or if it could be a problem as well.

Any suggestions will be greatly appreciated.

shdoug

You said it runs about a minute. How does it run during that minute? I'm not a trained mechanic but I have played with Bosch K-Jetronic systems (I think that's what you have) on Volvos and VWs. Those engines have a flapper (Don't know what it's called) that is held down by a spring and as the airflow increases it pulls the flapper up and meters more fuel into the engine. Very simple and effective system. If the Merc system is like that I would say there is a problem with the fuel distributor or that spring that holds the flapper down, but I doubt a system that new used the same setup as my cars from the early 80s. Sorry for my ignorance, but there are some really good mechanics on here so be patient.

mgw_300e

It is virtually the same. CIS and CIS-E (K- and KE Jetronic) have all of the same mechanical parts.