code 14 came on, electronic air control.help!
03-26-2005, 03:29 AM
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code 14 came on, electronic air control.help!
well i did a few redline pulls tonight 1-3 and some of 4th gear..well after doing that a few times i drove regularly shifting at 3rpm home..well as i was driving home the check engine light comes on.i pull the code and its cel 14 which is electronic air control? why did it pop up and what should be the problem here? any help thanks
03-26-2005, 04:22 AM
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I have two separate diagnostic trouble codes for #14.
(P1508) Idle Air Control Valve Circuit Failure
Probable causes
*IAC valve
*IAC valve circuit
*ECU
(P0505) Idle Control System Malfunction
Probable causes
*IAC valve mechanical malfunction
*Fast Idle thermo valve malfunction (A/T)
*Throttle body clogged port, improper adjustment
*Intake manifold, gasket leakage
*Vacuum hoses leakage
*Engine Coolant Temperature sensor incorrect output
*Throttle Position sensor incorrect output
I assume you don't have a scantool so here's some other troubleshooting tips.
Check the engine speed at idle with no load conditions: (headlights, blower fan, rear defogger, radiator fan, and air conditioning are not operating.)
Is it 750 plus or minus 50 rpm or is it around 550 rpm? (B18B)If it's 750 plus or minus 50 then it's an intermittent failure. Reset the ECU if this is the case.
Another thing you could try is to disconnect the 2P connector from the IAC valve. Does the engine speed drop or the engine stall? If not replace the IAC valve. See if you can clean the ports in the throttle body.
(P1508) Idle Air Control Valve Circuit Failure
Probable causes
*IAC valve
*IAC valve circuit
*ECU
(P0505) Idle Control System Malfunction
Probable causes
*IAC valve mechanical malfunction
*Fast Idle thermo valve malfunction (A/T)
*Throttle body clogged port, improper adjustment
*Intake manifold, gasket leakage
*Vacuum hoses leakage
*Engine Coolant Temperature sensor incorrect output
*Throttle Position sensor incorrect output
I assume you don't have a scantool so here's some other troubleshooting tips.
Check the engine speed at idle with no load conditions: (headlights, blower fan, rear defogger, radiator fan, and air conditioning are not operating.)
Is it 750 plus or minus 50 rpm or is it around 550 rpm? (B18B)If it's 750 plus or minus 50 then it's an intermittent failure. Reset the ECU if this is the case.
Another thing you could try is to disconnect the 2P connector from the IAC valve. Does the engine speed drop or the engine stall? If not replace the IAC valve. See if you can clean the ports in the throttle body.
03-27-2005, 01:06 PM
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yea so i resetted the ecu and its normal idle again..but i do notice i still get that stuck idle when i come to a stop it revs up a little on its own and falls down to normal idle..
03-27-2005, 04:34 PM
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yea it went awayy right after but almost all my cels go away when i reset ecu..its matter if it comes back or not. can you supply a pic of th iacv so i know where it located exactly..i have a skunk2IM if it alters the location or anyuthing..
03-27-2005, 04:37 PM
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Originally Posted by pbizzlegsr
yea it went awayy right after but almost all my cels go away when i reset ecu..its matter if it comes back or not. can you supply a pic of th iacv so i know where it located exactly..i have a skunk2IM if it alters the location or anyuthing..
Edit: Found a better picture.