SilentNight1647 Posted July 9, 2011 Share Posted July 9, 2011 I just got back from Japan last week and I decided it was a good time to get my 280 out of the weeds. I bought the car a few years ago and drove it for about a year with no major issues. Well now it has major issues. It wont idle it wont rev and it damn sure wont move under it's own power. I thought it might be a vacuum leak and it did indeed have a few of those but upon plugging the last hole the motor died. I thought it was kind of random and tried to start it again, no dice. At this point I decide the electronics might be the problem as they have always been interesting in this car to say the least. Well after some digging I find that the ECU in the car is actually an N/A ECU and harness despite the really big chunk of cast iron hanging of the exhaust manifold. I knew that it had issues but now I don't even know where to begin, I didn't even think it would run with that ECU let alone drive for as long as it did. I have checked the ignition input to the ECU, the power at the relays, the injectors, cleaned the AFM, and checked the distributor and all appear good. At this point I don't know what else to check, if anybody has any ideas I'd appreciate some help if this continues I'm putting a small block in it and saying screw it. Quote Link to comment Share on other sites More sharing options...
dexter72 Posted July 9, 2011 Share Posted July 9, 2011 How is the fuel and fuel filter?. Is the fuel pump working?. Do you have fuel pressure?. I would also check those things. Yes, your engine will run on N/A electronics. Quote Link to comment Share on other sites More sharing options...
SilentNight1647 Posted July 9, 2011 Author Share Posted July 9, 2011 I knew I was forgetting something I'll check the fuel pressure next. Quote Link to comment Share on other sites More sharing options...
SilentNight1647 Posted July 9, 2011 Author Share Posted July 9, 2011 No dice. 40psi using an Inline gauge. Quote Link to comment Share on other sites More sharing options...
SilentNight1647 Posted July 9, 2011 Author Share Posted July 9, 2011 I think I figured it out the afm is causing the problem I unhooked it from the intake and stuck a screwdriver in the door and now the motor idles at 14.9 afr. Quote Link to comment Share on other sites More sharing options...
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