p1508 98 Civic D16Y8
#1
p1508 98 Civic D16Y8
I have recently swapped my engine with the same model (D16Y8) and had help from a friend as I had never done it before. I had him plug everything in and it turns out that he plugged a few things in wrong. I drove for a month with the CEL on, but to make a long story short I'll get to the point. He had plugged in the 2PIN connector for the IAC into the PSP and vice versa. When I finally noticed it I switched it back but I have the code P1508 (IAC Circuit Malfunction). I have followed the instructions in the service manual which included testing the 2 pin connector for voltage which had 12V. A12 to ground also had voltage (10). The IAC clicks when jumping A10 and A12.
I have also cleaned and replaced the valve with another. Is there another connector that may be plugged into a wrong spot that can cause this? I have a manual transmission (5 speed)
I have spent so many hours trying to solve this and have searched COUNTLESS forum posts and have not found a solution. If anyone has any help it would be much appreciated.
I have also cleaned and replaced the valve with another. Is there another connector that may be plugged into a wrong spot that can cause this? I have a manual transmission (5 speed)
I have spent so many hours trying to solve this and have searched COUNTLESS forum posts and have not found a solution. If anyone has any help it would be much appreciated.
#3
#5
Re: p1508 98 Civic D16Y8
Bump.
So I got a new ecu and IAC and the problem persists. I checked for continuity on the yellow/black from the connector to the ecu to the connector going into the IAC. There is continuity. Now for some reason other is no continuity between the blue/black on the IAC side to the ecu side, however if I test the blue black on IAC side to the yellow/black on the ecu side there is continuity. Any reason for this? Also another thin to mention which I don't before is that the motor that I put into my car came out of n automatic an I had o swap fly wheels on the engine because my car is a stick. Is there any difference with wiring on these two motors? Both are the same model
EDIT: quick question with the harness. Is there a middle point on the harness that unplugs so that I can check for continuity there and possibly narrow down where a problem might be, if any.
So I got a new ecu and IAC and the problem persists. I checked for continuity on the yellow/black from the connector to the ecu to the connector going into the IAC. There is continuity. Now for some reason other is no continuity between the blue/black on the IAC side to the ecu side, however if I test the blue black on IAC side to the yellow/black on the ecu side there is continuity. Any reason for this? Also another thin to mention which I don't before is that the motor that I put into my car came out of n automatic an I had o swap fly wheels on the engine because my car is a stick. Is there any difference with wiring on these two motors? Both are the same model
EDIT: quick question with the harness. Is there a middle point on the harness that unplugs so that I can check for continuity there and possibly narrow down where a problem might be, if any.
Last edited by TWMY16; 02-15-2013 at 02:35 PM.
#7
Re: p1508 98 Civic D16Y8
I'm dying here guys, help me out
When I did the swap I had to switch intake manifolds as well. does the automatic vs manual intake have different specs for the IAC?
When I did the swap I had to switch intake manifolds as well. does the automatic vs manual intake have different specs for the IAC?
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