97 civic/LS swap -- idles high, surges, and throws code P1508
11-14-2011, 05:01 PM
#27
Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
Properly repin just the Blu/Blk wire into A12.
And you didn't answer my questions in the last post. Your problem seems to be sloppy wiring.
11-14-2011, 05:27 PM
#28
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
Ron blue and black wire is pinned to a12..disregard the black wire..I removed it..it was there because I had that wire running to the iacv connector in the engine bay..I removed it and checked voltage at the pin and got 11v..can I just run the wire straight to the ecu..and not go through the harness..
11-14-2011, 05:56 PM
#29
Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
Was the 11V measured from pin A12 in disconnected ECU connector A with the key in ON(II) with the engine off? If so, what voltage do you measure across the two battery posts and from the Yel/Blk wire in the unplugged IACV connector?
11-15-2011, 04:41 AM
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
Did the test..and results are 250.mv at a12 pin..12.1v at a12 connector..12.6v at battery post..12.1v at iacv connector ylw/blk wire
11-15-2011, 09:09 AM
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
did the test the results are.. 250mv at the pin of a12.. 12.1v at the connector of a12.. 12.5v at the battery posts..12.1v at the yellow/blk wire on the iacv connector
11-15-2011, 10:54 AM
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
i switched ecu's with my old p2p one and still same thing? i kno this may souns stupid but how do i ground a12
11-15-2011, 12:52 PM
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
ok did that and the idle stays at 1500..but fluctuates 100 rpm or soo?? i changed the ecu and it did the same thing...could i have 2 bad ecu's??
11-16-2011, 02:23 PM
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
i switched the ecu and the car idled normal but it was misfring and the rpm shot back to 1500 and kept fluctuating from 15 to 2k... i think it might be timing?? wouldnt you say??
05-24-2017, 11:47 AM
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
I have a problem code 1508 iacv malfunction..replaced iacv did idle relearn procdure and my car still idles high like 2k it starts off at 1500 then creeps to 2k bled coolant checked for vaccum leaks nothing..grey messing with the idle screw Nada..idk wut else to do my car is a 97 ek with a ls swap..I'm guessing the guy used a single cam harnesses cause he did the 3 wire iacv conversion..please can u point me in. The right direction..my idle surges up nd down nd if I unplug the iacv it stablizes.. please help I also checked the tps.. and I'm running and ls ecu..I also want to run the tps wires straight to the ecu how do I go about doing that..thank you very much for your help..
any input helps please..
any input helps please..
I'm having the same problem right now too I have a B16 in my 97 Acura Integra GSR with the same problem but I've been going through everything to check to see what's the problem it can only be two to three things make sure you check all your vacuum lines going to the idle air control valve if everything is good there check the idle air control valve and make sure it's not clogged or dirty if so go ahead and change it and make sure your wire connector on your idle air control valve is connected all the way ..now if that doesn't work check your throttle body start the car and just let it idle make sure you keep your hood open walk to your throttle body and try to push down the throttle body cable and if your RPMs drop down when you push it down then go back inside the car and give it a little gas make sure it's in neutral give it a little gas then let off and if it's still idling kinda high still push down the throttle body cable again if it idles fine when you push down the throttle body cable that means you need to buy a new throttle body to fix the idle air control valve I just order my brand new throttle body . I hope that will helped you out ... sometimes you just got to play project of elimination.... PS also make sure you check your coolant level that can also cause the idle air control valve not to function properly
05-24-2017, 11:50 AM
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Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
And make sure your idle air control valve is for a B16 engine that plays a big difference because some of the idle air control valve cannot handle the VTEC....
Are you running the stock ECU and wire harness?
Are you running the stock ECU and wire harness?
05-24-2017, 01:39 PM
#43
Re: 97 civic/LS swap -- idles high, surges, and throws code P1508
Do you realize you are replying to 6 year old posts? There is a high probability that the person you are replying to doesn't even own that vehicle anymore.
If you are having issues with your car, you should start your own thread with your car information and if desired, reference this thread if it's in line with your challenges.
If you are having issues with your car, you should start your own thread with your car information and if desired, reference this thread if it's in line with your challenges.
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