I recently put a new header on my 96 xj 4.0 last one was cracked. In the process I cleaned the throttle body and IAC. After installing the header I have a odd idle issue. It idles at 1k but if I pop the throttle coming up to a light of press brake and pop throttle it will settle down to 700/800.

My other issue that just came back after a while. Is I had my a/c on yesterday and while trying to pass someone my Jeep acted like it was in nutruel when it tried to go into OD. I then realized I wasn't going into OD and the sec I shut the AC off the Jeep shifted into OD!

Are these problems linked or am I hunting for 2 separate issues I am at my wit's end with these issues.

Already tested for vac leaks there are non new IAC was installed (last one was corroded) everything else on the Jeep works great just the odd idle and AC/transmission issue

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