Join Date: Apr 2010
Location: Melbourne Australia
Strange probs after IAC change
Hi All I'm a Noob to the forum and to all this EFI stuff as a matter of fact
Now here is my big problem I'm Having trouble after changing a faulty IAC valve. I had a problem with idle fluctuating and changing the valve fixed that but now have another problem.
When I start the car it will start normally then after about 30 seconds sometimes more or less I can hear the computer click and the car almost dies (sometimes does) then changes its running, sometimes will rev very high or will start to run very rough (even if I move the revs up it runs roughly) after a while it seems to smooth out most times.
When it is hot if I turn on the ignition and don't start, the fuel pump will run and stop, but then after about 3 seconds I get a click a click at the computer and it runs again.
I have put a new MAF sensor in but after clearing the codes then running at idle for a few minutes it comes up with a 157 code (although each time after about two minutes the engine will stop and need a restart).
I tried to run a cylinder test and the reader came up with a 998 code then just went to continuous buzz.
I did dis-connect the battery after the change.
When I changed the IAC I had to undo all the wiring from the engine side as I can't get to the plug an the eec side, I'm wondering now if this problem could be a broken or damaged wire.