Outside temp differences causing bad ground with ks?

[buttbologna]

First post, Just a few quick questions, 95 J30, it seems lately here in KY with temps going up and down outside, the J drives quite nice when the weather hits about 70 and above, anything below 65 however the car is quite sluggish and the tach is pretty erratic going slightly over 2000, and then jumping up and down, warm weather however tach goes all the way to redline no problem and seems to have no issues with acceleration in any gear. I was thinking maybe a bad ground at the ks, but before I dive into that, just wanted to see if anyone had any other suggestions?

[gr8scott72]

Scan for codes first then I'd try the resistor trick to bypass the KS and see if that's the problem if there aren't any codes.