Hi all, after many, MANY hours scouring 'Mud for a solution, I come to you for help...
Here's the lay of the land..... 1995 JDM FZJ80, bone stock 1FZ and A442F, both in really good condition mechanically, but CONTSANTLY having idle and power loss issues. Starts fine after 2-3 rolls on the starter, revs to 1800, drops down to around 1200, once the loop closes it sits right at 400rpm in neutral and trips over itself constantly, and by constantly, I mean it sounds like its about to stall any time you rev it, in any gear. This all started after a decent 900mi road trip, during which the rig ran PERFECTLY the entire time.
Here's what I've done to fix it:
EGR completely deleted(non-OBD so no paperclip needed), upper and lower intake mani gaskets, new TB gasket, new IAC o-ring, o2 sensors (twice), IAC and TPS replaced, every vacuum line and hose replaced, new oil cap, new intake tube, everything unuser capped off, new coil, new complete oem dizzy, new wires, new plugs with correct gap, adjusted both the throttle and kickdown cables, timing set to both OEM spec and advanced a little, neither to any avail, EGR tube harness melting issue is not present, everything has been plugged in and replugged in 5 times at least, no loss of continuity ANYWHERE.
I am totally and completely beat by this. I am a Toyota Tech, ASE Master and the works, and CANNOT figure this out at all, nor can some more experienced Masters in my shop, hence all the parts thrown at it. It's really starting to beat me up that I can't figure out what is wrong!
EDIT: I've already sprayed the ENTIRE intake track with starting fluid to try to help find a vac leak, as well as positive and negative pressure testing on the intake, both yielding results within OEM spec
Here's the lay of the land..... 1995 JDM FZJ80, bone stock 1FZ and A442F, both in really good condition mechanically, but CONTSANTLY having idle and power loss issues. Starts fine after 2-3 rolls on the starter, revs to 1800, drops down to around 1200, once the loop closes it sits right at 400rpm in neutral and trips over itself constantly, and by constantly, I mean it sounds like its about to stall any time you rev it, in any gear. This all started after a decent 900mi road trip, during which the rig ran PERFECTLY the entire time.
Here's what I've done to fix it:
EGR completely deleted(non-OBD so no paperclip needed), upper and lower intake mani gaskets, new TB gasket, new IAC o-ring, o2 sensors (twice), IAC and TPS replaced, every vacuum line and hose replaced, new oil cap, new intake tube, everything unuser capped off, new coil, new complete oem dizzy, new wires, new plugs with correct gap, adjusted both the throttle and kickdown cables, timing set to both OEM spec and advanced a little, neither to any avail, EGR tube harness melting issue is not present, everything has been plugged in and replugged in 5 times at least, no loss of continuity ANYWHERE.
I am totally and completely beat by this. I am a Toyota Tech, ASE Master and the works, and CANNOT figure this out at all, nor can some more experienced Masters in my shop, hence all the parts thrown at it. It's really starting to beat me up that I can't figure out what is wrong!
EDIT: I've already sprayed the ENTIRE intake track with starting fluid to try to help find a vac leak, as well as positive and negative pressure testing on the intake, both yielding results within OEM spec