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bird crazy · Jun 5, 2012, 07:44 AM

I have an 86 trans am 305 tpi after warm up the eng idles around 1500 rpm if I disconnect the maf the plug to maf or the air tube going to intake.the rpms drop.to.about normal.I then get a check eng light on.I took the maf off and cleaned the wires through the screen.with carb cleaner.reinstalled no change.any ideas?

TxGreaseMonkey · Jun 5, 2012, 08:35 AM

Have you tried adjusting the throttle cable, to lower the idle rpm?

bird crazy · Jun 5, 2012, 10:02 AM

I never messed with it before but I can adj how?

bird crazy · Jun 5, 2012, 10:10 AM

Originally Posted by TxGreaseMonkey

Have you tried adjusting the throttle cable, to lower the idle rpm?

I've never messed with it before how do I adjust it? Also should car run bad or stall when maf disconnected

bird crazy · Jun 5, 2012, 10:56 AM

Originally Posted by TxGreaseMonkey

Have you tried adjusting the throttle cable, to lower the idle rpm?

I tried turning down idle iturned it al the way It went down to 750 then,back up to 1500

TxGreaseMonkey · Jun 5, 2012, 11:20 AM

My experience has been that you may get away with cleaning a MAF Sensor once, but not much more than that. Replacement tends to be around 140,000 miles.

Analyze your throttle cable set-up. Usually, you can loosen the outside jam nut, to lower the rpm, and then tighten the inside jam nut. Before, you were likely messing around with the idle speed adjustment screw, where you remove the connector to the IACV and make fine adjustments to the idle speed. Afterwards, you reconnect the connector to the IACV. I imagine your idle speed, however, is grossly out of adjustment and you need to focus on the throttle cable.

bird crazy · Jun 5, 2012, 11:43 AM

OK ill try that thanks

bird crazy · Jun 5, 2012, 02:02 PM

Originally Posted by bird crazy

ok ill try that thanks

There is no nut on cable for adjustment.just the adjustment above throtle linkage cast into driver side in front

bird crazy · Jun 5, 2012, 02:07 PM

Originally Posted by bird crazy

there is no nut on cable for adjustment.just the adjustment above throtle linkage cast into driver side infront

Isthere a way to test maf sensor out of car mayve ohm it and if so how?

bird crazy · Jun 8, 2012, 07:39 PM

Maf semsor seems to check.out.but still has high idle.starts out at 1100 cold start up then slowly creeps to 1500 and stays there.I have idle screw turned all the way in.