keven

Thanks for the fast reply, I already read your post on AC and torque converter. I'm at work now but can wait to go home and test drive my truck with Alternator fuse pull off to see if CC is acting funny still.

Good Day all , I did search a lot before asking but I could not find. My truck is stock and I has boost / fuel pressure and exhaust temp gauge. So for the last 2 year my truck was always cutting fuel/power without me letting the gas pedal off. it was not noticeable physically but I could see it on the boost gauge , it was maintaining 4 PSI and then dropping to 2 and back up to 4 on a flat road. As soon as I was turning the cruise control on it was going away. problem solve. I'm always on CC. Now since the last 6 month, my truck don't get dead pedal effect when CC off, but as soon as I turn the cruise control on, my truck start accelerate way pass the speed which was selected and then it slow way down the speed selected again. So it is hunting very bad. After 10 minute the engine goes to idle so I jump on the clutch , tap the go pedal few time and the power is restore. I did a 12 hour round trip and it did that 5 time every time I use the CC so on the way back I did not use CC so it was fine. But I got a 224$ speeding ticket! My question now , would it be cause by a slowly degrading TPS , I have the truck for 6 years now and I notice the hunting 2 year ago a while after I installed boost gauge, when a TPS goes bad does it goes bad fast or it can take a very longue time to finally go so bad that you can not use the truck? would it be coming from AC noise from the alternator that cause the CC to malfunction and a small interference in the TPS that cause the engine to hunt when no on CC? Thanks a lot