87xjmike
Well-Known Member
- Joined
- May 11, 2015
- Messages
- 121
- Reaction score
- 24
- City, State
- Colfax, ca
- Year, Model & Trim Level
- 93 exploder
1993 5spd 4wd expo
My motor started at around 1350-1400 when I first fired up the rebuild and after 3 hours of run time she sticks to a 1k rpm idle speed. When I release the clutch to take off it goes back down to ~750 on take off from a stop.
What should the voltage and ohms be to anD from the coolant temp sensor? And does anybody know what pin it is at the PCM?
I can't seem to get a solid reading and fear either my PCM is ####ed or I'm testing the cts wrong as its hard to get to. After I siezed my motor in a water crossing, I had to rebuild it and the tranny. The water never got higher than the lower part of the grill on the bumper. The carpet got a little squishy wet, but no water was splashing around above the carpet.
I've checked for vac leaks- she pulls a solid 25 on a vac gauge at a 1200 rpm idle, it goes down to, 10-15 when I Rev it so I'm pulling a good vacuum from my vac tree on the back of the intake.
Cts/ect is new and ran good before the rebuild
I connected my ford specific obd1 tester and it said 111=system ok, then a 30. The book goes from 29 and humps to 31 skipping 30. So is 30 a real code? If not that's why I fear my PCM is going kaput
I tested the TpS and it's good
I swapped in a known good maf
Sprayed carb cleaner everywhere
No change in idle when I disco the IAC- I did take it apart and clean it and changed the gasket.
My rebuilt motor runs great otherwise, this high idle is just bugging me.
Thanks in advance for any help.
My motor started at around 1350-1400 when I first fired up the rebuild and after 3 hours of run time she sticks to a 1k rpm idle speed. When I release the clutch to take off it goes back down to ~750 on take off from a stop.
What should the voltage and ohms be to anD from the coolant temp sensor? And does anybody know what pin it is at the PCM?
I can't seem to get a solid reading and fear either my PCM is ####ed or I'm testing the cts wrong as its hard to get to. After I siezed my motor in a water crossing, I had to rebuild it and the tranny. The water never got higher than the lower part of the grill on the bumper. The carpet got a little squishy wet, but no water was splashing around above the carpet.
I've checked for vac leaks- she pulls a solid 25 on a vac gauge at a 1200 rpm idle, it goes down to, 10-15 when I Rev it so I'm pulling a good vacuum from my vac tree on the back of the intake.
Cts/ect is new and ran good before the rebuild
I connected my ford specific obd1 tester and it said 111=system ok, then a 30. The book goes from 29 and humps to 31 skipping 30. So is 30 a real code? If not that's why I fear my PCM is going kaput
I tested the TpS and it's good
I swapped in a known good maf
Sprayed carb cleaner everywhere
No change in idle when I disco the IAC- I did take it apart and clean it and changed the gasket.
My rebuilt motor runs great otherwise, this high idle is just bugging me.
Thanks in advance for any help.
