So I finally added a chip to my 95 only to have a weird issue. I am working with the tuner on the issue but I am not completely sure I can rule out the truck as the cause of the issue.
Here's the issue... basically a stock 95 built 10/94 with a TEE4 PCM, no issues prior to chip install. With the chip installed, 30° f outside starting the truck in stock I see 600 RPM, in the tow or performance tune I see 1000 RPM. Same setup with it 50° f outside and I see 800 RPM. The thing is this isn't the normal cold idle, I can hold the brake and drive around at the same idle RPM till the truck warms up then it's back to 600 RPM.
The only similar issues I have seen are here 1 2
but have no solutions. Has anyone else run into this issue? The reason I question the truck is the chip and tunes have been used in many other trucks so I am thinking I must have some weird combination of parts or issues.