Problem with chipped ECU?

[nrowensby]

Okay... I have two ECU's one chipped... one stock. When running the GIAC chip, my car will occasionally just shut off. Sometimes it while sitting at a stop light, sometimes when I am cruising down the road at 40, other times while I am doing 80 down the interstate... I see no pattern, it's just like a random shut off... no CEL's. It will also ocassionally buck a couple times while I am driving but continue to run.

Any ideas? I have never had a problem with the stock ECU...

[offroader1006]

how long have you driven the car with the stock ecu compared to the chipped ecu

are you missing any screws in the ecu box cover?

i had a similar issue with water entry on the ecu board due to a missing screw in the box.

[George@Revo]

Okay... I have two ECU's one chipped... one stock. When running the GIAC chip, my car will occasionally just shut off. Sometimes it while sitting at a stop light, sometimes when I am cruising down the road at 40, other times while I am doing 80 down the interstate... I see no pattern, it's just like a random shut off... no CEL's. It will also ocassionally buck a couple times while I am driving but continue to run.

Any ideas? I have never had a problem with the stock ECU...

It sounds like you have a solder connection that is loose. Check the chip. You should be able to send it back to the GIAC dealer and have them re-solder the Eprom for you.