not going into closed loop!
Hey Nick, what a coincidence! My car isn't either. This is a long story, so here it goes...
My car had a crappy idle, "tip in" stumble and severe detonation at WOT since I got it. I spent the entire weekend doing a spring cleaning hoping to find the problem. I should also say that I was told the car had the original chip in it. This is what I came up with...
I removed the breather from the turbo intake and installed VC breather. Flushed intercooler and thoroughly cleaned TB. Reset IAC, checked, adjusted and ultimately replaced TPS! ( Idle voltage OK but could not get WOT at 4.55 to 4.85) New TPS is on the money! I then replaced oil saturated boost solenoid, IAC motor, and coil pack. (Why not, it's all 15 years old). I also installed an adjustable fuel regulator set at 45 with vac line off.
Started the car and same crappy idle and tip in stumble! WTF... I hooked up the OTC 2000 again and everything looked good except the coolant temp reading of 79 to 80 degrees! The car still went into closed loop regardless of the cold temp reading! I replaced the CTS and still 79 to 80 reading on scan tool! I pulled the ECM and checked chip. IT WAS NOT ORIGINAL! Chip has a flourescent orange sticker on top and hand written # on bottom?????
I only have one other chip being a Thrasher 100! What the hell, I installed it. The tip in stumble and bad idle are cured
The CTS reading is still 79 to 80 but now with the Thrasher it will not go into closed loop!
Can any body help me with diagnosing the CTS problem? I wiggled the wires at the plug and where they go into the harness to no avail. Is there supposed to be voltage present at the CTS? If so what should it be? Any common problem areas I should look at first? Somebody HELP..... PLEASE!!!
Nick, Do you have a stock or mild street chip I can borrow? The Thrasher 100 is still to much with pump gas. I still get knock at 3/4 throttle! I don't want to add a head gasket to the list!
Thanks in advance for any suggestions, Vic