b18b1 idling at 3000rpm dont know whats wrong with it

B16, B18, B20
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b18b1 idling at 3000rpm dont know whats wrong with it

By 94EJ2
- Mon May 23, 2011 4:43 am #256406 well first off its not my car thats doing it its my friends ek coupe with a b18b1 swap with a pr4 obd1 ecu.

heres what ive done with no luck
cleaned the fiv
replaced the iacv
bleed the cooling system
replaced pcv
tried different ecu's (different pr4 and a obd2 ls ecu)
adjusted idle screw all the way in
checked thottle body
replaced throttle body gasket

i have no idea what is causing it and the only code it pulls is 41 main o2 sensor heater
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By teal_dx
- Mon May 23, 2011 1:39 pm #256442 There's no point in trying to diagnose a car with a bad o2 sensor since it tells the ecu how to run your engine. Replace the bad o2 sensor first :thumb:

Is the idle constant or bouncing up/down? does it do it all the time?
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By 94EJ2
- Tue May 24, 2011 4:28 am #256527 had the throttle cable completly off the tb and was still at 3k

would a bad intake mani gasket make it do it.

but it also gets really hot im not sure if thats part of the problem
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By Honda4life
- Tue May 24, 2011 8:21 am #256538 any cracks in the throttle body or hows the thottle body gasket itself?
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By elrompetoto
- Tue May 24, 2011 2:24 pm #256566
94EJ2 wrote:had the throttle cable completly off the tb and was still at 3k

would a bad intake mani gasket make it do it.

but it also gets really hot im not sure if thats part of the problem



u have a bad gasket or a bad vacume line
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