so far on my 1990 3.0 4x4 mighty max, ive replaced the coil, ign control module, ecu elay and the sensor inside the dizzy, and have had the ecu rebuilt twice the thing just sits and turns over but wont start its still not getting spark either. so what should i do next. look into getting the ecu checked out again, and if thats not thr problem look into replacing the engine wire harness. help is much needed and i am very thankful for any help or ideas you have.
Last edited by camoit; 11-25-2011 at 12:32 PM.
Sounds like u have a break in a wire or stretched or did you check ur fusible links and all ur fuses?
Do you have a manual that tells you what plugs and what pins in the plug should have power?
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if you are getting gas and no spark i would say fuse, bad wire....maybe a ground missing. There are a fuseable links as stated above... just get a tester and check everything. load tester or whatever tool it is....good luck man....
The mpi relay also supplies power to the coil and injectors. Have you checked for voltages at the relay?
troubleshooting can be a real pain in the a$$...i would just go through and check everything for power coming and going....do it with the key off, the key on accessory, then the key in starting postiion, while cranking, etc...unless you know more of where your problem isOriginally Posted by 4doorciv
good luck to you...
its starting to seem like i have a bad ground. i put the ecu back in yesterday. and i left the key on, but as the ecu case tapped up against the ecu mount the speakers made funny sounds. like when your cell phone rings when your listening to the radio.
Seems like it. Try to disconnect the ignition key and perform the same test. It could be a sdhort to ground, or short to power still.
so im not getting anywhere, its probably gonna go to the shop my brother works at so he can look at it. the have better tools and testing equipment.
I'm sorry to hear that. Good luck with the truck. Hope it gets fixed.
yeah me to. at least itll get done for super cheap. my brother can work on it when hes not busy at work, that happens quite often.
man what luck....atleast it seems to be a simple problem --just hard to find. GL with getting it fixed man....
haha yeah its gonna be a facepalm moment. but itll get fixed sooner than later.
the coil inteminently gets power and ground at different key positions. so im guessing still a bad ign switch or my ecu keeps getting fried.
I'm sure the ignition switch is part of the problem. That can cause other problems as well. Did you already replace the switch and harness?or replace the switch and repair the harness already?
this may be long shot over left field, but check your positive battery terminal, everything connected to it
the ign swith was replaced with the one from my quest, there the same just the quest ones longer. but i havent repaired the harness, there wernt any melted wires.
And the same problem after you switched the ignition? Then there could be bad wires somewhere. Did You guys test the wires at the mpi relay? There could a short to ground on one of the circuits. Doesn't take much for body parts to cut through insulation. If I have time I'll check my notes for the wires to the mpi relay to see which wires should be power and which should be ground.
Still waiting to hear what happened here!
still havent figured anything out. i dont know anyone who has experience eith these trucks or anyone who has time.
sorry to hear that Joey......i wish i could help but i know shit about the v6's........sorry man....
Yea same here, I would maybe try sticking around some 3000gt forums or montero forums, something more common with the v6, and asking for help on there.
i havent found anything helful on anyof those either. probably just try and sell it.
600 bux. who wants this headache?
theres a few people interested in it. looks like ill be selling it
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