The mpi relay also supplies power to the coil and injectors. Have you checked for voltages at the relay?
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 not getting spark or fuel. my brother checked the plugs at the ecu and said everything that should have power does. the fuel pump wasnt turning on at one point. after i changed the ecu relay it started working normally. ive checked the fusible links and the originals were dryed out and cracking. i got some decent looking ones from a wrecked low mileage montero at the junkyard. and i also found the main ground wire was unhooked from the block. i put it back. also the parts i replaced in the first post came off a running parts car.
You should tell him to test the wires at the relay. The fuel pump can prime with the starter signal but still not give power to the coil and injectors. That should be actuated by the key on position I believe. Ground is controled by the ecu. Check for power.
ok. ill try that this weekend. i can do that with a test light. if its a good relay that would mean the somethings up ith the wiring from the relay to the coil and injectors right? cause my fuel pumps primes, but it didnt before. and its normal for the fuel pump to only work when its turning over right. it doesnt prime when i turn it to ignition. also reading around on some troubleshooting info it said there was a TDC sensor. would this make it not spark or deliver fuel?
Last edited by joey_crandall; 04-14-2011 at 09:47 AM.
The fuel pump should prime while engine cranking and should stay on while the car is running. It doesn't prime when you put the key to the on position like other manufactures.
The tdc sensor, I'm sure is part of the distributor. I could be wrong but I'm pretty sure. I have been wrong before.
ok so the crank position sensor (mitsu calls it a photo optic sensing unit) is the tdc sensor. i appreciate you taking time to give me ideas and helping out the best you can.
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