Northstar Engines and System Technical Discussion Discussion, 96 Deville won't idle down, hard start and backfires when cold in Cadillac Engine Discussion; Wait a minute. Just checked me codes again and I do indeed have an IP1552 in history, as well as ...
Now tps is definitely acting up again. Car not wanting to idle down until I cycle the ignition 3 times. Ordered a Delco unit, will be here some time today. Now, did I get 2 bad autozone units that both gave out within 1000 miles, or is my car roasting them somehow?
Re: 96 Deville won't idle down, hard start and backfires when cold
Indeed. I normally steer clear of all autozone branded electronics, including starters and alternators, but I gave in on the tps because I was in a hurry. Came with a lifetime warranty, but given its a pain in the arse to change, I give up. I've found that I can usually buy genuine Delco and Delphi parts from Amazon for close to the same money as lower quality aftermarket parts. Free shipping via a Prime account helps. I only wish my local GM dealerships wouldn't attempt to fleece me every time I would like to purchase a part from them. oh well. New Delco tps will arrive today. Cost me $46 including overnight Saturday delivery shipping.
What is code ip1552? Pops up intermittently in history.
What is IRC in diagnostics? I always get NO IRC DATA.
New tps didn't fix. Car still acting funky. Still have tcc issue, intermittently. Brake fluid switch light now coming on intermittently, even though I've changes that sensor twice with junkyard parts. Trip odometer and avg fuel mileage still resetting here and there. Thinking this is all electrical. Ecm, pcm, something. Maybe a harness with a bad connection.
Also, when I plug in my bluetooth obdii adapter and run a scan using an app on me android phone, it makes my car shutter. And, some of the voltage readouts bounce around, which I originally attributed to the cheap adapter and software.
Tried to run a full diagnostic scan using Torque Pro, but it kept endlessly refreshing, while the car sputtered and began to overheat. So I cut it short, not getting any info, and cleared the car's computer. Restarted the car and it cooled right back down is running smoothly again.