Yet another "won't fire" thread. Help
10-01-2009, 07:28 AM
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Yet another "won't fire" thread. Help Ok ladies and gentlemen, here's the deal, did a 00' lq4 swap into my 96 bird, got a crappy tune with the wiring and it fired and ran(poorly but it started) so I sent the PCM off to frost and now it won't fire at all. I know he knows what he's doing so did something go bad in the week it sat? It has power to the coils and injectors both static and cranking, pulled the plug and tested the fire no spark. All I got is my bike right now and the temp is steadily dropping haha.
10-01-2009, 07:04 PM
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Worked on it again tonight no headway, power to the coils but not down the wire at all. Changed the crank sensor and that did nothing,2 grounds 1 hot pink and a purple that does Jack, ideas? I'm desperate I miss my car.
10-02-2009, 07:07 PM
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Your kind of screwed with out a lab scope or some kind of graphing meter to test the signals to your coil/module. The pink wire is a common power coming from your injector fuse. depending on what coil your on(lets say #1) the purple wire is ignition control coming from the PCM. (tells the coil to fire) Black is ground, and the brown is reference low which I believe is from your crank signal from the PCM. I would start at that wire but again you will need a scope or a graphing meter to see if you have a signal(digital square wave) Probably didn't help one damn bit but I tried.
10-02-2009, 10:59 PM
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Well I pulled the PCM out and stuck it in the old mans truck and it busted right off with no problems. So the tune is good for his truck, however his PCM wouldn't fire mine. With my custom wiring harness I had built I think they bypassed something weird and the tune has to be done a certain way. Just my uneducated guess
10-03-2009, 12:21 PM
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pulled the plug and tested the fire no spark.
power to the coils but not down the wire at all
With my custom wiring harness I had built I think they bypassed something weird and the tune has to be done a certain way
10-03-2009, 02:00 PM
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Vats is off, and Ive tried to contact them to no avail, and power to the coils but not to the wires, and no I haven't checked the pressure yet but I know I have pressure.The pinouts are all outa place. Maybe in the market for another harness soon.
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10-05-2009, 08:30 AM
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Ok well the problem is obviously wiring or PCM related, so i'm gonna redo the wiring system from scratch and if that don't fix it them the PCM is wrong which I doubt because it fired my fathers 6.0 in his truck. Any advice?
