I'm re-reading this and I realized none of us have mentioned exhaust leaks. If you have an exhaust leak ahead of your O2 sensor, you'll get a bad mixture, and it'll also cause the backfiring.
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The vin tells me it's og engine was a v6. I have confirmed the injectors i put in it are the 5.7 injectors. However idk how to tell which chip it's running. I've pulled the ecu out before.
DrunkThe vin tells me it's og engine was a v6. I have confirmed the injectors i put in it are the 5.7 injectors. However idk how to tell which chip it's running. I've pulled the ecu out before.
drunkCanuck is corrrct on the ecu. If they didn’t replace it with 5.7 ecu it will do stupid ****. Experienced this with a 305 to 5.7 swap of my own. Replaced with 5.7 ecu from donor motor truck. Worked for me.The vin tells me it's og engine was a v6. I have confirmed the injectors i put in it are the 5.7 injectors. However idk how to tell which chip it's running. I've pulled the ecu out before.
Yes, get that fixed 1st!Would that effect the way a timing light works?
Yes. One wonders if being installed in the wrong computer would damage the PROM.I will find a ecu for a 5.7 and see if that helps.
Mistake.I've always just timed it by ear
A tooth, or two, or eight, or whatever...makes no difference at all provided the distributor housing is rotated; and/or the spark plug wires are rearranged to suit.since I think the rotor might be off by a tooth or two.
No. They flash when the inductive pickup detects the voltage pulse of the spark.Would that effect the way a timing light works?
Fix what's wrong. Which in this case, may be basic incompatibility of PROM and computer. But who knows? There could be more to it than that. Or not.It always sounded like it runs super rough at tdc.