So bare with me because I?m going to include every detail I can think of.
2004 ls1 gto. Mods are really unimportant.
So intermittently I?ll have an issue where the tps (cable drive) % won?t return back to zero. It?ll start out getting stuck at .4%. Then for a little bit it?ll get stuck even higher at .8%. Sometimes it?ll work itself out. But other times it?ll start this cycle and work it?s way up to 9%. I?ll sometimes plug my scanner in to watch this. And when it gets stuck at 9%, I can press the throttle and it lags way behind, like there?s a huge delay and the engine will barely run or might not even run at all. The only way I can fix this is to disconnect the tps and iac, turn key on and let it sit for about ten minutes. Then plug back in and start. Wtf. It did this to me once while dropping my kid off at school in the drive through line. Quite embarrassing.
So here?s what I?ve chevked/changed
Grounds. All appear to be good. I even added another one.
New battery
New alternator
I?ve changed the tps about 5 times. New delco units.
I had a China throtttle body. I changed it to a nick Williams.
I did relocate the ecm inside the vehicle. It did this before however.
Randomly I?ll find random tables that zeros themselves. Wut? Like yesterday, my boost map was zeroed out.
I did have headers on the car that burnt through the heat shield protecting the ecm a while back. I don?t recall if this happened before that. The computer has been flashed many many times.
This is the most odd problem I?ve come across and I don?t find anything on the web like it. Anyone have this happen?