been doing some poking around:
I disconnected the TPS, car idles a bit rougher and STILL produces hanging rev when decelerating.
I disconnected TIP sensor, car wont even idle at normal speeds; Revs up to 3k, then slowly lets off to about 2.5k
This queues me to believe that my problem is caused by the TIP because It still happens despite TPS control.
I have a DSP-T and I can view the voltages to each sensor in real time. The TPS voltage looks consistent and does not jump or hang at a certain voltage. As a test, I slowly let in and off of the accelerator and logged it; no discrepancies.
My general question:
WHAT JOB DOES THE TIP HAVE in regards to loop controls???
IE: changes between open loop, closed loop, Idle closed loop, ect.
I have tried capping red line, does not seem to do much.
BoostinBen: Try to disconnect the TPS and take it for a ride; Tell me what happens; I suspect you should have the same results; It should do the same exact hanging thing as if it were connected. Next, If im correct, try reconnecting the TPS and disconnecting the TIP sensor, watch ur idle go CRAZY when u turn on ur car. At least then we can can isolate our specific problems because I understand this hanging rev can be caused by many different things, or many things in correlation...
Through my research as the most common culprits (from most likely to least likely):
1. TPS wire or wire harness is frayed/pulled out.
2. TPS sensor bad.
3. A large vacuum leak.
4. IAC wire bad.
5. IAC motor bad.
6. TIP not set up correctly (still alot of talk as to the best way to have red vacuum line)
7. Solenoid bad.
8. ECU bad.
I have personally gone through the first 5, and am trying to understand the 6th before I go point my finger at a specific culprit to my problem.