Sup R3v,
So I bought this e30 m50 late last year and have been slowly fixing it up. Car had lots of goodies installed. The swap though, was done so shoddily that I've basically had to "re-swap" the car, that being said, I'm in the finishing stages and have run the car for a couple hundred miles. Lately the CEL has been on and I've been experiencing idle and power issues. Idle sometime surges, and car misfires or breaks up at random times but mostly when warm. I've also seen the CEL come on and go off multiple times in say a 30 minute drive.
Here is a breakdown of symptoms:
M50 VANOS engine
Only CEL code: 1221
O2 sensor newish
Cluster coolant temp sensor (brown top) is new
Crank sensor is new
Knock sensors are new
spark plugs are new
coil boots are new
Valve cover gasket, intake boot, and all vacuum lines are new
Smoked tested (with home tester) no vacuum leaks
Sprayed carb cleaner, no detection of vacuum leaks
ICV hums at idle and was cleaned with brake cleaner
MAF just cleaned with CRC MAF cleaner
I'm tempted to buy a new O2 sensor but I'd rather do some deductive reasoning before throwing parts at this problem. Let me know what you think.
So I bought this e30 m50 late last year and have been slowly fixing it up. Car had lots of goodies installed. The swap though, was done so shoddily that I've basically had to "re-swap" the car, that being said, I'm in the finishing stages and have run the car for a couple hundred miles. Lately the CEL has been on and I've been experiencing idle and power issues. Idle sometime surges, and car misfires or breaks up at random times but mostly when warm. I've also seen the CEL come on and go off multiple times in say a 30 minute drive.
Here is a breakdown of symptoms:
M50 VANOS engine
Only CEL code: 1221
O2 sensor newish
Cluster coolant temp sensor (brown top) is new
Crank sensor is new
Knock sensors are new
spark plugs are new
coil boots are new
Valve cover gasket, intake boot, and all vacuum lines are new
Smoked tested (with home tester) no vacuum leaks
Sprayed carb cleaner, no detection of vacuum leaks
ICV hums at idle and was cleaned with brake cleaner
MAF just cleaned with CRC MAF cleaner
I'm tempted to buy a new O2 sensor but I'd rather do some deductive reasoning before throwing parts at this problem. Let me know what you think.
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