idle surge with new ISC

GsxEcutioner · Jul 30, 2010

So, before I replaced the ecu and rewiring the fuel pump, I had a normal running car, I replaced the ISC with a new unit since the old one burned out my old ecu, I replaced the ecu and added link lite and rewired the pump and got P0042 and had to rewire pin 13 to another 12v source in order to get the car to stay running. I now have idle surge and I have not touched anything motor wise except a new isc, I turned the biss all the way closed and still idles between 1000-2100 rpms. It just bounces around, anyone that might know whats up? Thanks
-Shane

GsxEcutioner · Aug 11, 2010

oh Im mistaken, the CEL shuts off when the car is running, but it stays solid when its just on the last click with the motor off. get it? I use link and check DTC's.

andy4g63 · Aug 11, 2010

No wonder you are wiseman Steve, Excellent job.. You are king on everything electrical

steve · Aug 11, 2010

Maybe it's a side effect of the prior hack job you did trying to get rid of the fuel pump CEL.

MattE · Aug 11, 2010

Try using some dyelectric grease in the electric plug. I was having the same problem with a new isc and i decided to try that and it fixed it. Good luck.

steve · Aug 11, 2010

I verified in my car that the CEL doesn't turn on in ACC.
Make sure you have reasonable values in DSMLink for the Dash Controls setting for Knock and Coolant CELs.

GsxEcutioner · Aug 11, 2010

Cel is on during run though right? And ill try the grease, btw how can the hack job do that? I just wired the mpi 12v to the fuel pump 12v.
-shane

steve · Aug 11, 2010

GsxEcutioner said:
Cel is on during run though right?

Only for the first five seconds.
Like I said make sure your not forcing it on in DSMLink.

GsxEcutioner · Aug 12, 2010

how would I force it on? Im not totally sure what you mean, and yes it shuts off after 5 seconds.

GsxEcutioner · Aug 14, 2010

I tried the connector grease, no help, i decided to just fiav blockoff, do i need a new gasket for the fiav?

GsxEcutioner · Aug 20, 2010

It was the ecu -__-, i bought a junk ecu that did everything you described thats supposed to happen.
-shane

steve · Aug 20, 2010

So that's ECU number 3 or 4 now?

GsxEcutioner · Aug 20, 2010

4 thats been in the car, scond that was bad wen bought, just paypald for a 5th one ... -_-

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