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weird idle on first run. B18C1

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Old 04-27-2011, 10:59 PM
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Default weird idle on first run. B18C1

Could this be caused by the ecu I'm running? I have a P72 virgin in the car now and its got headers and a blox intake manifold. Should i run a chipped P72 or P28 to fix this? It might sound like a weird solution but I read somewhere the car will not run right with a virgin ecu if there's aftermarket bolts ons on it. I don't think it could make that much of a deference but maybe I'm wrong. Any other thoughts are more than welcome.
Old 04-27-2011, 11:19 PM
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Default Re: weird idle on first run. B18C1

no way. your car should run fine with a stock ECU and only bolt ons. make sure your mechanical timing is correct and you have no vacuum leaks. is your check engine light on?
Old 04-27-2011, 11:26 PM
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Default Re: weird idle on first run. B18C1

maybe due to inake mani
Old 04-28-2011, 05:25 AM
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Default Re: weird idle on first run. B18C1

You need to describe the problem in more detail.
Old 04-28-2011, 04:41 PM
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Default Re: weird idle on first run. B18C1

these is a few vac. lines not hooked up and my check engine light comes on a little while after the car is running. im guessing i should see what the CEL code is right? let me check that real quick.
Old 04-28-2011, 04:44 PM
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Default Re: weird idle on first run. B18C1

um listen man,

make sure you have no vac leaks
check timing like stated above
check codes

next time explain the problem in more details
Old 04-28-2011, 09:01 PM
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Default Re: weird idle on first run. B18C1

got cel code 14 IAC. Cleaned it out and now idles way better just really high. i think its shot and i need a new one.
Old 04-28-2011, 09:02 PM
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Default Re: weird idle on first run. B18C1

how high
Old 04-28-2011, 09:44 PM
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Default Re: weird idle on first run. B18C1

try adjusting the idle screw on the throttle body (google it for a picture). check the manifold AGAIN for any vacuum leaks. if none, replace the IAC Valve.
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