1988 300E Starts When it feels like it???

[JohnnyV]

Well, here is the details. I have been able to nail down a repeatable condition.

When the car sets over night or a long time it has a good chance to start, but if it does not get a solid start and it stalls then it is highly unlikely that it will start, until it sits for a while. A while can be 10 min or 10 hours. For the most part it starts after 1-2 hours. Once Started it runs fine.

I have bought the Mercedes CD, but I have not been able to nail down the infor that I need to trouble shoot, and I do not have more than a VOM to trouble shoot.

After Reading a few posts on hard starting, I have to clarify that I have been using the slight accelerator method for starting, but if the car tries to start, but does not make it, I'm stuck for a while. I did replace the spark plugs, and I can say it seems to happen more when it is warmed up.

So if anyone can provide any basic directions to check or common problems that may occur with these models, that would be great.

Thanks for any help you can provide,

JohnnyV

[Mike Murrell]

Lots of possibilities. I'd start with injectors leaking down. Has been talked about a lot. SEARCH facility should pull up info on this area.

[JohnnyV]

Thanks Mike,

I did see some of that conversation, and it seems logical. Basically a flooded Fuel injected car. A first for my experience. However, I will see if there is any way to verify this issue. Here is a question for all these experts out there.

I have heard people state that it wil start when it goes into cold start mode.

Is there any way to force the car into cold start mode for starting?

Thanks again,

JV

[Mike Murrell]

Johnny - I suppose you could try to fake out the coolant temp sensor, but if I read your post correctly, this issue occurs more when warm. If you provide cold enrichment to an already warm engine, would it not become flooded or at least be inclined to do so?

My 2 cents.

[JohnnyV]

Mike,

Sorry I got wrapped up into the electronic fake out solution, and lost my common sense on the basic combustion fundementals.

Oh well I am off to go pick up my car right now, because it is at my wifes work place. I hope it starts!!!

Thanks for the help,

I will keep up the fight,

JV

[pesuazo]

Possible causes:
1.- Faulty OVP
2.- Faulty Fuel Pump Relay
3.- Clogged Fuel Filter
4.- Faulty Fuel Regulator
5.- Faulty Ignition Coil