Welcome Visitor! Please take a few seconds and 
Despite all my efforts, my truck is still not running well. Here, I want to list all that I did to my truck that resulted in the problem, and then go over all I did to troubleshoot. Hopefully with yinz's help, I'll be able to figure this out!
My truck was running well for the longest time, but had a bad oil leak, as well as the classic 2.9 lifter tick. So, one 3 day weekend, I lifted the engine, and proceeded to change the oil pump and the oil pan gasket. I almost had to pull the entire engine out to get the clearance I needed. When I put the engine back in, I redid the starter wire (cause it was bare on multiple points). I also replaced the main grounding cables (also bare and corroded). Well, long story short, I put it all together, and no start. Big surprise, I put the distributor on wrong... Straightened that out, and got it started. Right away, it started surging and stalling like never before. I figured it was because I forgot to plug in a few vacuum lines and sensors, but it wasn't. I had to feed it gas to keep it running. When it was warm, I was able to set the timing.
Since then, this surging while cold problem has plagued me.
In my effort to diagnose what happened, I proceeded to buy a multimeter and start testing wires, starting with the O2 sensor wires, since those were most likely to get damaged lifting the motor. No problems. I tested the IAC, the ACT, the ECT, the TPS, and the MAP. I ended up replacing the MAP, TPS, and ACT (the act only because I coated it in gasket sealant). Minimal improvement. I also replaced the TFI. No improvement.
I also double-checked the grounding points I messed with. No problems. I have less than a half ohm between any given ground on my truck. I just double checked all vacuum lines... No problems. So, last ditch, I replaced the ECU, because the reference voltage was wrong to the ECT sensor (4.6 instead of 5). Still no improvement
I also have a problem while shifting... When I push in the clutch, the engine revs up 500-1000 rpms too high.
Sorry for the length of the post... I'm desperate! Thank you for any help you can offer! At this point I think I may just have to replace harnesses, and cover all my bases.
My truck was running well for the longest time, but had a bad oil leak, as well as the classic 2.9 lifter tick. So, one 3 day weekend, I lifted the engine, and proceeded to change the oil pump and the oil pan gasket. I almost had to pull the entire engine out to get the clearance I needed. When I put the engine back in, I redid the starter wire (cause it was bare on multiple points). I also replaced the main grounding cables (also bare and corroded). Well, long story short, I put it all together, and no start. Big surprise, I put the distributor on wrong... Straightened that out, and got it started. Right away, it started surging and stalling like never before. I figured it was because I forgot to plug in a few vacuum lines and sensors, but it wasn't. I had to feed it gas to keep it running. When it was warm, I was able to set the timing.
Since then, this surging while cold problem has plagued me.
In my effort to diagnose what happened, I proceeded to buy a multimeter and start testing wires, starting with the O2 sensor wires, since those were most likely to get damaged lifting the motor. No problems. I tested the IAC, the ACT, the ECT, the TPS, and the MAP. I ended up replacing the MAP, TPS, and ACT (the act only because I coated it in gasket sealant). Minimal improvement. I also replaced the TFI. No improvement.
I also double-checked the grounding points I messed with. No problems. I have less than a half ohm between any given ground on my truck. I just double checked all vacuum lines... No problems. So, last ditch, I replaced the ECU, because the reference voltage was wrong to the ECT sensor (4.6 instead of 5). Still no improvement
I also have a problem while shifting... When I push in the clutch, the engine revs up 500-1000 rpms too high.
Sorry for the length of the post... I'm desperate! Thank you for any help you can offer! At this point I think I may just have to replace harnesses, and cover all my bases.
