2002chevy2500
Newbie
Posts: 3
Reg: 03-29-21
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03-31-21 04:14 PM - Post#2817230
Truck turns over and dies instantly. Cranks fine and everything sounds good it just dies as soon as it starts. I already checked fuel pump relay and ignition relay and they’re good. Fuel pump sounds good, I’m going to test fuel pressure just in case. Also fuel gauge and voltage gauge both stopped working at the same time the truck wouldn’t start up. There is no security lights flashing. I’ve tried numerous amount of time to start it. Took a test light and fuses looked good. In need of some help
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 rockfangd
"8th Year" Gold Supporting Member
Posts: 3099
Age: 35
Loc: Utica ny
Reg: 04-13-10
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03-31-21 05:01 PM - Post#2817234
In response to 2002chevy2500
Does it have a security light??
If it does start but then shuts right off that sounds classic of a Passlock Failure.
It kills injector pulse as soon as the engine starts.
| Old School GM fan FOREVER |
Edited by rockfangd on 03-31-21 05:01 PM. Reason for edit: No reason given.
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 wagonman100
Site Ambassador
Posts: 15086
Loc: Baltimore, MD
Reg: 11-27-04
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04-02-21 07:17 PM - Post#2817363
In response to rockfangd
He said the security light is not on. It could be the crank sensor. The fuel pump primes whenever you turn on the key so the engine will run off of that fuel for a second or two. But if the computer is getting no signal from the crank or cam sensor, it will shut off the fuel pump.
Jay
Friends don’t let friends drive Fords.
1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier |
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rockfangd
"8th Year" Gold Supporting Member
Posts: 3099
Age: 35
Loc: Utica ny
Reg: 04-13-10
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04-03-21 09:09 AM - Post#2817385
In response to wagonman100
I asked if it has a security light. Sometimes the light does not work. If it does come on on the key on cycle then you know the light works.
It could be the crank sensor or wiring to it, but hopefully there would be a DTC pointing to it.
| Old School GM fan FOREVER |
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2002chevy2500
Newbie
Posts: 3
Reg: 03-29-21
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04-03-21 01:45 PM - Post#2817396
In response to wagonman100
Is there a way I can test those sensors without replacing them?
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2002chevy2500
Newbie
Posts: 3
Reg: 03-29-21
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04-03-21 01:46 PM - Post#2817397
In response to 2002chevy2500
I used a scan tool and no dtcs came up. I put a new ignition wiring harness and switch in and that made no difference and still has the same problem
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wagonman100
Site Ambassador
Posts: 15086
Loc: Baltimore, MD
Reg: 11-27-04
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04-04-21 01:06 PM - Post#2817454
In response to rockfangd
Sorry, I was assuming since he said there was no security light flashing that it has one and is working.
Jay
Friends don’t let friends drive Fords.
1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier |
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