BakerFJ
Benny Bodangus
***EDIT: problems been found and fixed. eBay reman AFM was bad although all the bench tests were within factory spec***
Hey what's up y'all. Been chasing a running issue on my 93 FZJ80 for awhile.
The issue started as intermittently running like it was firing on half the cylinders, with no acceleration or power at all. At the time it was giving codes for the IAT, VAF, and TPS. Both tested out of spec so I went ahead and replaced them, and no change. After a few days of going through absolutely everything on the Cruiser---all sensors tested good, swapped in a spare ECU, the works. I did find my rear knock sensor connector was unplugged, it crumbled to pieces in my hand, and the wire was broken. Went ahead and pulled the harness assuming that was my underlying issue and went through the whole thing end to end, all new connectors, terminals, and weather seals, and replaced any wires that had become brittle or dogged from the heat.
Got everything back together last night and she started right up, however on my test drive, I found I had no acceleration under load. I can accelerate from about 0-20% throttle, albeit poorly, and anything beyond that it just bogs down. Now I'm just getting codes 24 and 32 for the IAT and VAF. Pulled out my reman unit and retested, and all was in spec. Even taped the crap out of my intake boot in case I had a vacuum leak but still no change.
SOO at this point I'm at my ABSOLUTE WIT'S END as I have no idea as to what the issue could be.
I will note, my fuel pump regulator is making a loud ticking noise, which is new to me. However during my initial testing/inspection I had proper fuel pressure, so don't know what that's about, although it is a red flag to me.
Anyways, if anyone has some input it would be greatly appreciated as I'm beating my head against the wall at this point. Gonna try to find a known good used VAF locally to swap and see if anything changes, but at that point I would just be throwing parts at it in hopes I find the issue.
Maybe I should just LS swap it
Here's some pics of the wiring harness, all new loom and Raychem DR25 heatshrink everywhere I could, anything else is Tessa taped. Even relocated the O2 wires as I have mine installed at the exhaust manifold. I'm involved in a lot of racing/motorsports so this is the base standard of any wiring I typically do. If it were a fully custom harness I would've ran service loops but didn't see a need to since I wasn't redoing every single wire
Hey what's up y'all. Been chasing a running issue on my 93 FZJ80 for awhile.
The issue started as intermittently running like it was firing on half the cylinders, with no acceleration or power at all. At the time it was giving codes for the IAT, VAF, and TPS. Both tested out of spec so I went ahead and replaced them, and no change. After a few days of going through absolutely everything on the Cruiser---all sensors tested good, swapped in a spare ECU, the works. I did find my rear knock sensor connector was unplugged, it crumbled to pieces in my hand, and the wire was broken. Went ahead and pulled the harness assuming that was my underlying issue and went through the whole thing end to end, all new connectors, terminals, and weather seals, and replaced any wires that had become brittle or dogged from the heat.
Got everything back together last night and she started right up, however on my test drive, I found I had no acceleration under load. I can accelerate from about 0-20% throttle, albeit poorly, and anything beyond that it just bogs down. Now I'm just getting codes 24 and 32 for the IAT and VAF. Pulled out my reman unit and retested, and all was in spec. Even taped the crap out of my intake boot in case I had a vacuum leak but still no change.
SOO at this point I'm at my ABSOLUTE WIT'S END as I have no idea as to what the issue could be.
I will note, my fuel pump regulator is making a loud ticking noise, which is new to me. However during my initial testing/inspection I had proper fuel pressure, so don't know what that's about, although it is a red flag to me.
Anyways, if anyone has some input it would be greatly appreciated as I'm beating my head against the wall at this point. Gonna try to find a known good used VAF locally to swap and see if anything changes, but at that point I would just be throwing parts at it in hopes I find the issue.
Maybe I should just LS swap it
Here's some pics of the wiring harness, all new loom and Raychem DR25 heatshrink everywhere I could, anything else is Tessa taped. Even relocated the O2 wires as I have mine installed at the exhaust manifold. I'm involved in a lot of racing/motorsports so this is the base standard of any wiring I typically do. If it were a fully custom harness I would've ran service loops but didn't see a need to since I wasn't redoing every single wire
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