hey guys, this has been driving me nuts for the last two days.
my car is a 88 7mgte,it's in a 85 shell. run's maft pro and has run flawless for the last 3 months with this setup and the motor has ran with out a hicup in my 88n/a shell and my 87 turbo shell.
i upgraded the injector's on saterday, and when i finished and started the car sunday it ran rough.
we did a cylinder power balence test, by removing the spark plugs one at a time. this showed we had great spark to all cylinders and that 1 and 4 were not getting fuel.
looking into the matter a little closer reveals cylinders 1&4 are on the same power and ground circuit. no10.
i have tested continuity from the injector clip to the ecu, good.
i have tested continuity from the resistor pack to the injector clip, good.
the injectors i am using at purple top rx7 injectors and are low impedence 2.4ohms.
i have tested my resistor pack, b+ to terminal no10,no20,no30. 3.4ohms,3.6,3.4ohms
with key on i have 12 volt power at the injector, resistor pack and at the ecu on .no10,no20,no30.
what tosses me for a curve ball, if i switch injector clip from cylinder 2, onto cylinder 1 , cylinder one fire's, so injector's are good.
so now im looking at the ecu, so i swap in a known good ecu from a car that drove up and drove out running fine.
and the problem was still there.
my buddie with the spare ecu will be coming back over tonight and im going to try some more test's with his ecu in my car and mine in his.
my car is a 88 7mgte,it's in a 85 shell. run's maft pro and has run flawless for the last 3 months with this setup and the motor has ran with out a hicup in my 88n/a shell and my 87 turbo shell.
i upgraded the injector's on saterday, and when i finished and started the car sunday it ran rough.
we did a cylinder power balence test, by removing the spark plugs one at a time. this showed we had great spark to all cylinders and that 1 and 4 were not getting fuel.
looking into the matter a little closer reveals cylinders 1&4 are on the same power and ground circuit. no10.
i have tested continuity from the injector clip to the ecu, good.
i have tested continuity from the resistor pack to the injector clip, good.
the injectors i am using at purple top rx7 injectors and are low impedence 2.4ohms.
i have tested my resistor pack, b+ to terminal no10,no20,no30. 3.4ohms,3.6,3.4ohms
with key on i have 12 volt power at the injector, resistor pack and at the ecu on .no10,no20,no30.
what tosses me for a curve ball, if i switch injector clip from cylinder 2, onto cylinder 1 , cylinder one fire's, so injector's are good.
so now im looking at the ecu, so i swap in a known good ecu from a car that drove up and drove out running fine.
and the problem was still there.
my buddie with the spare ecu will be coming back over tonight and im going to try some more test's with his ecu in my car and mine in his.