I have a very annoying problem. My engine is running very rich and black smoke is visible. the smoke and smell of unburnt fuel at the exhaust is so strong it is not possible to stand there more than half a minute.
these are the stuff on my car...
- e30 with e36m42 engine
- has AC installed (e30 type)
- oxygen sensor plugged even though exhaust has no cat
- diagnosis keeps showing error code 100 (control system error).
- idles badly and stalls ALL the time especially when hot or when car is coming to a traffic light.
- misfiring due to running too rich. and can hardly accelerate
this is a problem that has come back since one year ago. i do not know what caused this.
i have changed the following:
- new crankshaft sensor;
- new camshaft sensor;
- replaced air flow meter with a known good one causes the same problem;
- swapping the DME with a known good one;
- changed the DME relay to a new one
the strange thing is when the air flow meter is unplugged it idles well. but of course the car cant accelerate.
there is a lot of "klak-klak" sound below the dashboard/glovebox when the engine idles. the kind of sound like when you turn on AC. what kind of device under it produces this? it seems to switch on and off when it idles.
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the DME is very hot. the casing of DME is too hot to even touch it. is this normal? I feel that this maybe due to insufficient power to the DME? because as soon as the AFM is unplugged, it idles well and smooth. and with AFM, it sputters and the rpm goes up and down running very rich.
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i am really at wits end now. i dont know how to troubleshoot this and dont know what the culprit it.
please help.
thanks.
teo
