Quote:
Originally Posted by Por_sha911
3.8 V8. When first shut off, the engine fires with half a crank of the engine. If I let it sit more than 30 minutes, it turns and turns and then fires and runs rough until I blip the throttle and clear the motor (running rich?).
Sounds like classic cold start valve. Can anyone tell me where its located?
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No, it sounds like a classic *lack of stored fuel pressure* problem. The cold start valve would have nothing to do with these symptoms. The "cold start valve", (really an extra injector), merely squirts additional fuel into the engine when you start it cold. When it malfunctions, the engine will be difficult to start when cold. It's the choke.
Lack of stored fuel pressure is a common problem on Mercedes with CIS. It is usually caused by a bad check valve at the fuel pump or sometimes a bad accumulator, also near the fuel pump under car near tank/rear axle.
I don't have time to read all the responses here, so maybe someone already said this. And yes, the Peachparts forums are very good. Pelican bought them out last year.
