Engine/Transmission (1998.5 - 2002) Surging when cold

[VolsFan]

Had a surging issue when temperatures were below 55 or so. Now that it's been warm haven't felt it. Noticed it when shifting, felt like it was a driveline or rear end issue, would buck a little if I didn't let out of the throttle. Saw something a while ago about a sensor under the battery could cause this? Thanks for any info

 

[DavidC]

Sensor under the battery is a temp unit for battery charging. I doubt that would cause your issue. The IAT ( air intake temperature sensor may cause an issue. You could try pulling it and cleaning with brake cleaner as it is basically a thermistor.

Dave