[dr_grndntl]

On Sat, I was driving the highway to the track and a short time after turning on the cruise, I felt a hesitation and the SES light flickered.

The SM only showed a code 51 - non std chip (running a Red's 93). It happened a few more times until it started running like ****.

Pulled off the h/way and disconnected the orange wire. Ran fine upon re-start until I re-activated the cruise.

Noticed the IAC #'s were running around 60-70 and when it hesitated, it would jump down to 35-40 and return to 70. Switching off the cruise solved the prob.

Do I need a new IAC? Where should I begin the search?

Dan

 

[Steve Wood]

51 means the prom is bad, or it is not seated and making good contact. When this happens, the ecm goes into limp home mode which assumes a completely stock car (injectors) etc.

Remove the chip, run a pencil eraser over the contacts to clean them up and reseat the chip.

It can also be a bad ecm socket but that is pretty rare.



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[dr_grndntl]

Thanks Steve.

I had all kinds of malfunction codes a few weeks back which cleared up after unplugging the orange wire.

I'll try the eraser test first before I look for a new chip.

Dan

 

[Steve Wood]

usually, it is not the chip...but it can happen. Usually just not quite making a good connection in the socket. Hope that fixes it.



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