So my 86 GXL has been giving me issues. When I warm up the car it misfires really bad until it reaches operating temps, at which point it smooths out. The main problem is that once I start driving and come to a stop, depressing the clutch, the idle drops down to like 500RPM and starts to stumble, before surging up to about 850. Wash, rinse, repeat for the whole time im stopped, dips down, engine starts to stumble, then raises back up. I tested the TPS and got a solid reading of 1k Ohms up to 5k at WOT. Also smoked the entire intake system and didn't find a single pinhole leak. Im leaning towards fuel, but is there anything else I could be missing?