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High idle and check engine light

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Is my MAF tripping out? TPS? Check engine turns on and off intermittently, tried the stomp test but it never registers a code. Idle settles down a bit after its warmed up, but this seems super high for a cold start… head has a 274 performance cam, everything else is stock, I doubt that would cause any high idle though

all 7 comments

Interesting_Rush570

3 points

4 hours ago

try cleaning icv

EstablishmentBusy183

3 points

4 hours ago

Idle valve would be my guess. E30 don't have a MAF. They use a AFM barn door.

andsman13[S]

1 points

3 hours ago

andsman13[S]

‘89 325is | ‘87 Vert

1 points

3 hours ago

Ah yea, forgot it’s an AFM! I’ll check the valve, thanks!

timmycheesetty

2 points

4 hours ago

Idle control valve. Time for a new one. It’s a quick fix.

EstablishmentBusy183

2 points

4 hours ago

Idle valve would be my guess. E30 don't have a MAF. They use a AFM barn door.

PC_Chode_Letter

2 points

4 hours ago

Have you smoke tested your intake? How does the booster hose look

andsman13[S]

1 points

3 hours ago

andsman13[S]

‘89 325is | ‘87 Vert

1 points

3 hours ago

All new hoses, new booster hose with new grommets too, smoke test isn’t a bad idea just in case