| Go back to previous topic | | Forum name | Performance/Engine | | Topic subject | Symptoms of a Bad ECU.. | | Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=88139 |
88139, Symptoms of a Bad ECU.. Posted by xdannyx25, Apr-12-05 12:20 AM
I recently rebuilt my engine completely and put it back in. Everything went well till I started the shit. It would idle at 3500 rpms, then suddenly after my cousin started the car like 5 times to hear the exhaust it wouldnt start again. So I changed the IACV since I had an extra one to fix the idle problem hopefully. But it doesnt start due to theres no spark and no fuel. The coil harness isnt getting any voltage besides .7 on cranks. I decided to change the cam sensor with a used one (doesnt mean its good) still didnt get spark, I then put in a brand new crank shaft sensor and still no spark. I got fed up and gave up on the spark shit for that day and moved to the fuel problem. The fuel pump wouldnt run, so I replaced it since i have warranty, still nothing, I check the relays and had them click with wires and they did. Also to add theres no check engine light.
-New fuel pump -Relays suposively check out good -New crank shaft sensor -2 different Cam sensors -2 different coils (i just changed it for the hellk, have an extra one)
Im goign to check the wiring today and the ASD relay (see if i have an extra one). Also have my friend with a scanner see if that might help use. But if it isnt that, could it possibly be my ecu?
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88140, RE: Symptoms of a Bad ECU.. Posted by talonguy2005, Apr-12-05 01:31 AM
the ECU really seems like a possibility, did it start before?
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88142, RE: Symptoms of a Bad ECU.. Posted by mcgyvr, Apr-12-05 04:12 AM
well the ASD relay does give power to the coil and fuel injectors. so that could def be your problem.
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88143, RE: Symptoms of a Bad ECU.. Posted by xdannyx25, Apr-12-05 05:26 AM
Yes the car started before tons of times.
Im sorry for not adding this. Its a 1997 Mitsubishi Eclipse GS
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88151, RE: Symptoms of a Bad ECU.. Posted by thedawg, Apr-12-05 08:41 AM
Sounds like ASD relay.
The 1995 ECU goes bad in the way you described, but I haven't heard of a 1997 failing like that.
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88219, RE: Symptoms of a Bad ECU.. Posted by xdannyx25, Apr-13-05 10:41 AM
The ASD relay is good. There is no voltage at the harness to the fuel pump, cam sensor, and crank sensor.
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