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  1. BakerFJ

    FZJ80 Running Woes

    Put a good-used one on🤷🏻🤷🏻 a lot of time spent for a such a trivial thing! There are ways to convert the OBD1 trucks to a MAF sensor, but for the time and money spent you can run a standalone ECU and do way more cooler things.
  2. BakerFJ

    FZJ80 Running Woes

    Whew, it's been a while! I found the issue in the end. As expected it was something stupid, albeit still tricky! The AFM was bad, however the full spread of bench tests pointed to it being perfectly fine. I acquired a used AFM and slapped it on for s***s and giggles, and she purrrrrred. Moral of...
  3. BakerFJ

    FZJ80 Running Woes

    Skip ahead 6 months of being swamped between being a full time engineering student, physics lab assistant, and racecar pitcrew mechanic who has no time to work on his own cars LOL: Probably reiterating some stuff from before, but I want to revisit the symptoms I'm experiencing (and possibly some...
  4. BakerFJ

    FZJ80 Running Woes

    Yessir, as well as overhauled the fuel system as I hadn't gone through it in years...lol Regarding my TCM codes, which may be related to why it's running poor at times-- I'm wondering if I mixed up a wire or two on the TCM connectors. I did build the wiring harness at 3am :D When I have a chance...
  5. BakerFJ

    FZJ80 Running Woes

    Been a couple hundred miles, TCM codes came back, but don't seem to be affecting anything *shrug*. Also have seen a TPS code show face once, which is suspicious, although it is a new Duralast sensor that I had in the parts bin, wouldn't surprise me to find it already having issues, but I don't...
  6. BakerFJ

    FZJ80 Running Woes

    About 45 miles since I cleaned out the TCM connections above the starter---no codes!! Wild, because I don't remember the last time I didn't have a code. Usually has at least something like VSS (speedo doesn't work). Still having cold start/closed loop issues, but having no codes is a really good...
  7. BakerFJ

    FZJ80 Running Woes

    Haven't had an engine light pop up since cleaning the TCM connectors--havent checked my codes yet though. Installed the new intake tube this morning (1996 style, people say it needs trimming, I just shoved it on and it worked with worm drive clamps). Cold startup after was much better, I don't...
  8. BakerFJ

    FZJ80 Running Woes

    Just cold started--no extreme misfiring/low idle as before. Still a slight misfire though. Half tempted to install an air/fuel ratio gauge. Thought it'd be cool to integrate a digital display into the OEM clock. My clock doesn't work currently anyways, just got a sticker on it that says MPG:ASS...
  9. BakerFJ

    FZJ80 Running Woes

    Swapped ECUs the other morning and took a look at the P/Ns Peep the parachute pants. The swag is real 60170 is the original ECU to the truck, and is known to eventually have issues (which is included in a recall) with TCM Communication codes. Haven't had this one installed in years. The 60221...
  10. BakerFJ

    FZJ80 Running Woes

    Ha no worries on the conversion, I'm an engineering student and do everything in metric anyways. Good point on the gas, I mean FUEL. And football? You mean pass and clash?😂
  11. BakerFJ

    FZJ80 Running Woes

    I was really excited for these, I'm not sure why I had such extreme issues with them. In all the pictures I've seen they're orange/brown colored whereas the ones I received were black. Manufacturers usually color code injectors, but I also might be overthinking it. I'm just out here wanting...
  12. BakerFJ

    FZJ80 Running Woes

    What sort of mileage do you get with propane?? And the thought about coolant getting in definitely crossed my mind. It still wouldn't be a bad idea to rebuild my head, but at that point I'd rather put the money towards an engine swap
  13. BakerFJ

    FZJ80 Running Woes

    So regarding the cold start; Pulled codes 83, 84, 85 for TCM Communication 😅 These codes are well documented to exert the symptoms I'm experiencing, and is repaired by installing the later model ECU as there was a recall. I believe I already have the later model but I'll have to check. I have 3...
  14. BakerFJ

    FZJ80 Running Woes

    I would love to be able to upgrade the injectors, I mean as long as they flow the same volumetric rate over a certain time as the OEM ones it should work in theory. The fuel pressure regulator controls fuel pressure in the system and the pump simply feeds fuel. It's possible if the injectors...
  15. BakerFJ

    FZJ80 Running Woes

    Had a good buddy come by and give me a hand with my 80. The Bosch O2s came in from RockAuto, but one was wrong. After that I'm done buying anything from RockAuto, not sure what happened, they used to be really good. Got a set of OEM O2s from Oreilly's and installed them with new spark plugs...
  16. BakerFJ

    FZJ80 Running Woes

    Bucked up today and hammered out the last of anything I had left to check. Figured there's no good reason to run around in circles chasing wiring, and instead look at things I haven't considered yet. Pulled the valve cover to inspect timing alignment (reasoning was the truck smoothed out with...
  17. BakerFJ

    FZJ80 Running Woes

    Currently it will start up, run really poor, and die on it's own regardless of throttle input. Jumping B+ to FP doesn't change anything (just to rule out the AFM wasn't killing my fuel) The issue is also intermittent, sometimes it starts up and purrs like a kitten. I've done a lot thus far and...
  18. BakerFJ

    FZJ80 Running Woes

    Been whittling away at the wiring. Truck actually ran pretty decent today, enough to take it for a wash. Went to bolt the ECU up when I got home and it immediately died while it was running. Found a few terminals at the ECU that were loose and weren't making good connection with the ECU...
  19. BakerFJ

    FZJ80 Running Woes

    Second injector came in today (I ordered the first preemptively with other parts just in case, but didn't expect to need two) Kinda dumb but when I ordered the second one I wasn't at home to see the brand of the first, but I was gonna have them flow matched anyways so as long as it's reman I...
  20. BakerFJ

    FZJ80 Running Woes

    Did a cylinder drop test today. When unplugging injectors #1 and #2, there's no change in the poor running. Subjectively good news to me because I now have the problem child isolated to two cylinders. So three things could be going on; either the injectors are sticking, stuck open, or I...
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