TPI will not start. how do i verify the injectors are firing?
10-15-2007, 08:41 PM
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TPI will not start. how do i verify the injectors are firing?
This is a 92 and it will not start 
I have 40psi of fuel pressure and i have spark. It will run if I pour gas in the throttle body but it dies as soon as it is used up. I pulled an injector connector and it has 12 volts on BOTH sides. is that correct?
please help!!!!
I have 40psi of fuel pressure and i have spark. It will run if I pour gas in the throttle body but it dies as soon as it is used up. I pulled an injector connector and it has 12 volts on BOTH sides. is that correct?please help!!!!
10-15-2007, 09:06 PM
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Re: TPI will not start. how do i verify the injectors are firing?
I think this may be a pass key / vats problem. the engine has been swapped into a 85 truck. i have wired in a resistor but i may have the passkey box wired wrong 
so how do i verify that the injectors are firing?
so how do i verify that the injectors are firing?
10-21-2007, 06:33 PM
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Car: 1992 Z28 Camaro w/70k
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Re: TPI will not start. how do i verify the injectors are firing?
10-21-2007, 07:21 PM
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Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
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Re: TPI will not start. how do i verify the injectors are firing?
What do you do if only one side of your engine has the injectors pulsing? How do you get the other side to pulse?
10-21-2007, 07:50 PM
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Re: TPI will not start. how do i verify the injectors are firing?
my issue was vats. I did not have it powered right.
if only one side is firing you have a wiring issue in the injector wiring or a bad ECM.
if only one side is firing you have a wiring issue in the injector wiring or a bad ECM.
10-21-2007, 08:23 PM
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Re: TPI will not start. how do i verify the injectors are firing?
ECM only grounds the injectors to make them fire.
730 and 165 ecm only have one injector driver so if one bank goes down it most likely blew one of the inj fuses. Each bank has its own power, the ground is the common between the two.
If one bank is down, u have wiring issues(short to grd from positive) or bad injectors(although they dont blow the fuses to often, Ive only seen it once), they tend to overheat the injector driver and shut down, also be a fluke bad fuse not common but it does happen as well.
730 and 165 ecm only have one injector driver so if one bank goes down it most likely blew one of the inj fuses. Each bank has its own power, the ground is the common between the two.
If one bank is down, u have wiring issues(short to grd from positive) or bad injectors(although they dont blow the fuses to often, Ive only seen it once), they tend to overheat the injector driver and shut down, also be a fluke bad fuse not common but it does happen as well.
10-24-2007, 11:21 AM
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Car: 91 Formula WS6 (Black, T-Tops)
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Re: TPI will not start. how do i verify the injectors are firing?
I'd like to verify one thing said up above about the noid light....
IF the noid flashes, does that mean the injector actually fired, or only that the ECM told it to fire?
IF the noid flashes, does that mean the injector actually fired, or only that the ECM told it to fire?
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10-24-2007, 12:16 PM
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Car: 91 Formula WS6 (Black, T-Tops)
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Transmission: Built '97 T56, Pro 5.0, CF-DF
Axle/Gears: 4.11 posi Ford 9"
Re: TPI will not start. how do i verify the injectors are firing?
Thanks, that's what I thought. Appreciate the info!!!!
10-24-2007, 04:25 PM
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Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
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Re: TPI will not start. how do i verify the injectors are firing?
Well my fuses are good so there goes that idea. I ohmed the injectors and they are all good.
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