Pyromancer
Member
- Joined
- May 1, 2018
- Messages
- 31
- Reaction score
- 2
- Points
- 8
- Location
- Seattle, WA
- Vehicle Year
- 1994
- Make / Model
- Mazda
- Engine Type
- 4.0 V6
- Engine Size
- 4.0
- Transmission
- Manual
- 2WD / 4WD
- 4WD
Engine is in a 94 Mazda b4000. Engine is a rebuild from jasper not sure how many miles are on it. It uses the 8 bolt flywheel but the intake and everything matches an early ranger or explorer, I dont have an other b4000 to compare. Idle sits at around 900-1000 rpm. Unplugging the IAC does nothing, unplugging the TPS does nothing as well. I have tried swapping both of these. I built a smoke tester out of an old soldering iron and a bike pump no vacuum leaks. I have adjusted the diesel/idle screw and I cant get the rpm to drop anymore even with it backed all the way out. IAC gets 12v with the key on and goes up to 14.4 with the truck running. The first two wires on the TPS get around .8V. I have also replaced the egr, the O2 sensors, cleaned the MAF, replaced the coolant temp sensors. Did the glove on the radiator test to look for bounce to see if I had a cracked head.
I have read a lot of threads on high idle and I am scratching my head on what else I could try. No CEL codes.
I have read a lot of threads on high idle and I am scratching my head on what else I could try. No CEL codes.