jinscho
Proven Member
- 636
- 322
- Jun 16, 2017
-
Bangor,
Pennsylvania
I'm trying to clean up some bugs on my car so that I can get a tune and get it back out on the road. Last night while @dacowgod was reviewing some data in EVOscan, he noticed that my IPS sat at 0 as if the switch wasn't being triggered. We called it a night at that point as the car wouldn't idle properly on it's own in open loop, and once warmed up it would start and idle, but die every time you came to a stop.
So, this evening I went ahead and readjusted the TPS following the factory service manual:
- .0177 feeler gauge between the stop screw and throttle valve
- turned the TPS until I lost continuity on pins 3 and 4
- verified between .4 and 1v on pins 2 and 4 (.74)
- tightened the screws on the TPS
- verified pins 3 and 4 were still open / 2 and 4 was still in spec (still at .74)
- removed the feeler gauge and verified I had continuity in pins 3 and 4 again
I also took the time to test the ISC while I had the multimeter out following Jafro's video on testing it, and all coils came back with proper resistance.
After putting everything back together, I opened up EVOscan to check and see if the IPS would switch from 0 to 1 now that I had re-adjusted the TPS and... nothing. It just sits at 0.
Next up, I tested continuity between pin 87 on the ECU and pin 3 on the TPS plug. Have perfect continuity, no breaks in the wire.
Since I knew I had continuity on that wire, I decided to try a suggestion that Ricky made and just ground that pin to see if it would trigger a "1" value in EVOscan... nope...
What am I missing here? Is it possible the request ID (4A) and Function (x bit 128) are just wrong in EVOscan? I'm at a loss here and I just want to get this fixed and have the car back up and running.
So, this evening I went ahead and readjusted the TPS following the factory service manual:
- .0177 feeler gauge between the stop screw and throttle valve
- turned the TPS until I lost continuity on pins 3 and 4
- verified between .4 and 1v on pins 2 and 4 (.74)
- tightened the screws on the TPS
- verified pins 3 and 4 were still open / 2 and 4 was still in spec (still at .74)
- removed the feeler gauge and verified I had continuity in pins 3 and 4 again
I also took the time to test the ISC while I had the multimeter out following Jafro's video on testing it, and all coils came back with proper resistance.
After putting everything back together, I opened up EVOscan to check and see if the IPS would switch from 0 to 1 now that I had re-adjusted the TPS and... nothing. It just sits at 0.
Next up, I tested continuity between pin 87 on the ECU and pin 3 on the TPS plug. Have perfect continuity, no breaks in the wire.
Since I knew I had continuity on that wire, I decided to try a suggestion that Ricky made and just ground that pin to see if it would trigger a "1" value in EVOscan... nope...
What am I missing here? Is it possible the request ID (4A) and Function (x bit 128) are just wrong in EVOscan? I'm at a loss here and I just want to get this fixed and have the car back up and running.