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injectors aren't firing

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Old May 12, 2015 | 04:05 PM
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injectors aren't firing

If I spray starting fluid it will start but won't star running if I feather the throttle it will run for a little bit before it died the injectors start spraying after I hit it with starting fluid
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Old May 12, 2015 | 04:29 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

check your fuel pressure and ohm your injectors !
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Old May 12, 2015 | 04:57 PM
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Re: injectors aren't firing

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Old May 12, 2015 | 05:02 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

is this tbi, tpi or a v6 ?
tbi is 2.5 Ohms
tpi 16 1/2-18 1/2
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Old May 12, 2015 | 05:03 PM
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Re: injectors aren't firing

350 tbi
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Old May 12, 2015 | 05:24 PM
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Re: injectors aren't firing

So what now
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Old May 12, 2015 | 05:27 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

https://www.thirdgen.org/forums/tbi/...o-rs-wont.html
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Old May 12, 2015 | 05:35 PM
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Re: injectors aren't firing

I've had it at the dealership they said it was the computer or the distributor I put a different distributor in still the same thing swapped the ecm still the same thing
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Old May 12, 2015 | 09:14 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

Sounds like the low impedance/shorted injectors are shutting down the injector driver.
If you had someone diagnose it why isn't it fixed ?
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Old May 12, 2015 | 09:20 PM
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Re: injectors aren't firing

Dealer wanted 300 to put in a distributor and 300 more to put in ecm and it doesn't look like it's either of those
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Old May 12, 2015 | 09:28 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

You might want to try the tests on the other thread. Unplug both injectors and use a tbi noid light to check for injector pulse. Then read the post bye Rbob.
If this is a 89-92 tbi it's a 1228746 ECM read the post I put on messing the voltage on the vats wire. If this is a 88 it's a odd ball ECM. You can upgrade plug and play to the 746 ECM and use a caprice tune for a 350. eBay has standard motor products 350 injectors tj7j for under $100 a set.
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Old May 12, 2015 | 09:32 PM
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Re: injectors aren't firing

Mines a 91 I swapped ecms and it's doin the same thing and the dealer fixed the vats problem are you sayin the injectors could be bad
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Old May 12, 2015 | 09:48 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

Iirc tbi injectors are 2.5 ohms . Regardless unless you have a custom tune and the 65#hr injectors you engine will run lean. Read the testing procedures on the other thread. I would still eliminate the ECM is getting a drp , vats signal is getting to the ECM, both injectors unplugged and a noid light is used to test injector pulse.
Even test that the ECM is powered up, if the mil comes on with the key in the on position it is powered up.
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Old May 12, 2015 | 09:51 PM
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Re: injectors aren't firing

I'll have to try and get some no I'd lights and what do you mean mil
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Old May 12, 2015 | 10:09 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

Mil=malfunction indicator lamp
Amazon.com: OTC 7187 TBI Noid Lite for GM: Automotive Amazon.com: OTC 7187 TBI Noid Lite for GM: Automotive
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Old May 12, 2015 | 10:11 PM
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Re: injectors aren't firing

Probably rent them from OReillys or buy um there so what is the nod light gonna tell me
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Old May 12, 2015 | 10:14 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: injectors aren't firing

The noid light is going to tell you if you have injector pulse without the injectors plug in.
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Old May 12, 2015 | 10:15 PM
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Re: injectors aren't firing

And then what happens
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