Help -No Gas - will not Fire?
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From: central florida
Help -No Gas - will not Fire? Okay... I posting up for a buddy. I am Carb LSX guy...so I am not pro or even understand much with the GM FI system. The harness is aftermarket not sure the brand.
Car 69 Camaro with 6.0 Iron block with AL LS3 heads and LS3 intake and fuel rails -guessing a Camaro intake and rails. T-56 tranny.
The computer VATS was reset so we can rule that out. The injectors have 12 volts... the fuel pump works and we have 60psi at the motor. Motor spins over strong.
The Bad...
Plugs are dry.
Even when we spray fuel in the intake through the throttle body it doesn't start?
Any ideas on where we are start? Thanks!
Car 69 Camaro with 6.0 Iron block with AL LS3 heads and LS3 intake and fuel rails -guessing a Camaro intake and rails. T-56 tranny.
The computer VATS was reset so we can rule that out. The injectors have 12 volts... the fuel pump works and we have 60psi at the motor. Motor spins over strong.
The Bad...
Plugs are dry.
Even when we spray fuel in the intake through the throttle body it doesn't start?
Any ideas on where we are start? Thanks!
Pull a plug wire off a plug. Stick your pinky finger in the plug wire boot and put your other hand on some bare metal. Crank the engine over and report back what happens.
Why would you tell someone to do that? They can get a severe shock and if the person should happen to have a medical condition they could end up in the hospital or worse.
If you want to check for spark you can just leave a spark plug on the end of the wire and have someone turn over the engine. Or go buy a cheap spark tester that goes between the spark plug and wire.
I would test for spark but If plugs are dry I would guess it's a fuel related problem or possibly a lack of or bad ground.
Do you have a tach hooked up? Is it reading as you turn the engine over?
Do you have a tach hooked up? Is it reading as you turn the engine over?
You're no fun. I'm going to guess you don't check 9V batteries by touching them to your tongue. Relax. I was just telling him to check for spark since he said it didn't even hit when they sprayed fuel in the intake. And if he would actually test for spark that way then, well...............
I suspect he has both a fuel and spark problem.
I suspect he has both a fuel and spark problem.
Thread Starter
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From: central florida
Lol. the screw driver trick works for spark....we will check that but i believe it's fuel. Can't even smell gas. Just think injectors are not firing. Checking ground is a good idea... but we see 12 volts on the injectors.
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From: central florida
Yea it sparks good. I checked the grounds but can check again. And I have 12v to the injectors with the switch on. Bad injectors?? I hooked up a scanner and it shows rpm when cranking.
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Go rent some noid lights from the parts store. The PCM pulses them with grounds. Is the 12V there when cranking? Can you post the tune file so we can be sure it's not VATS? Do you have a data logging scanner to see if the PCM is commanding injector pulse?
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TECH Enthusiast
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From: central florida
thx guys...