Its a 93 with th following mods:
-PFC for ECU
-aftermarket: radiator, intercooler, intake, exhaust.
-nonsequential on stock turbos.
*stock injectors, rails, coils, etc.

The vehicle has been running fine, no issues, until recent: the vehicle starts and drives fine until about random (and 99% of the time) reaches avg. Temperature of 80+ degrees then the idle on gears drops, acts as if it was backfiring, and wont gas up. If you have ever had coil pack issues and they acted up on you, that's pretty much how it feels.
The car was lifted up for further inspection and funny fact - once the car is lifted, the issue stops.
Ive inspected the following:
-coil packs, plugs, wires - theyre all ok. Replaced plugs, wires anyway.
-ground: car is grounded properly ( as of my knowledge)
-fuel: pump, lines all ok. Injectors as well no issues.
-vaccum: all new fresh replaces hoses. No leaks.

The car was tuned by Steve Kan and. Ran just short of perfect for about 7months and was not gunned whatsoever. Granny driven.
Any other suggestions? If you have had this issue please shoot me some pointers, i will apreciate it greatly. My last try will be to strip the car entirely and get a new harness, for it sounds more like a short issue on the harness than anythig else.

 

The fact that once lifted the issue stops makes me wonder about the condition of the wiring harness running above the driver's side front wheel. I'd start by checking that.

 

Good idea. Is there anywhere i can look up onlne for a pic or info on wich wires go where?

 

Well you could try searching for a pic but that would be time consuming and probably futile. Or you could jack up the car, remove the driver's side front wheel and unclip the fender lines to have a look behind/above them.

The Factory Service Manual might have some diagrams but those probably won't be in scale.

 

Well shoot, gracer7. Thanks again man! Ill get on that asap and see what mess i got over there