93 Chevy 454 no fire or fuel

Jonc · 09-21-2006, 07:56 PM

I have a 93 chevy 454, 7.4, HD3500 gas 1 Ton that started missing and the last 20 miles to home had to run the excelerator on the floor to acheive 55 miles per Hour. Finally made it home and the pickup stopped running and will not spray fuel or fire. The fuel pump does pressure up and cut off. No fire at all at plugs. Does anyone have any ideals on what it might be. Thanks

bradrhale · 09-21-2006, 08:55 PM

start at the plugs and work your way backwards. if no fire at the plug, see if the coil is firing. if it is, look at the rotor under the distributor. the dizzy might have a crack in it also. if the coil is not firing, it could be a bad coil or that the points in the dizzy need to be replaced or adjusted. dwell meter will take care of that. make sure that you are getting power to your coil from the ignition. turn the key to on position and test for 12v at the positive post. if no power, problem with ignition. and thats ignition 101.
if i remember right, they didnt start using SFI til 95 or 96 so that would put you with TBI. if they are not spraying, i would check the power supply to the fuel injectors. since you are having power problems now, i have to wonder if you have some shorted out wires or bad fuses. i would look into that before you go diving into all that other garbage i have already talked about.

chevyguy · 09-21-2006, 11:59 PM

Hey brad it a 93, No point to adjust.

bradrhale · 09-22-2006, 06:50 AM

sorry, skipped over that part. knew i was forgetting something.

Jonc · 09-22-2006, 01:53 PM

Ok This what I done to it. Replaced plug wires, Dist.Cap, rotor, coil, little module located inside dist. thats bolted below the rotor on back side of distributor and fuel relay. Pick up cranked up run smooth, drove it for about 20 minutes and is doing the same exact thing again. Got it back home by putting excelerator all the way to the floor. Turned the motor off when I got home tried to crank it 30 minutes later with no luck. Checked it over and it is not getting fire to the plugs or spraying fuel. Exact same thing as before. Does anyone know if it could be the computer. Thanks

gmcman · 09-25-2006, 08:44 AM

what no codes

mr. goodwrench · 10-05-2006, 11:54 AM

hey try replacing you ignition module the module on your distibutor under the rotor if it goes out you lose spark and fuel. i know you replaced it but did you but the grease that ocomes with it between the module and the distributor. if not it will over heat and fail quickly, like after a 30 minute test drive. hope I helped and good luck

cookcs · 10-11-2006, 09:55 AM

How about changing the fuel filter.

09-21-2006, 07:56 PM	#1
Jonc Junior Member Join Date: Sep 2006 Posts: 2	93 Chevy 454 no fire or fuel I have a 93 chevy 454, 7.4, HD3500 gas 1 Ton that started missing and the last 20 miles to home had to run the excelerator on the floor to acheive 55 miles per Hour. Finally made it home and the pickup stopped running and will not spray fuel or fire. The fuel pump does pressure up and cut off. No fire at all at plugs. Does anyone have any ideals on what it might be. Thanks

09-21-2006, 11:59 PM	#3
chevyguy Senior Member Join Date: Sep 2005 Location: ALABAMA Posts: 3,160	Hey brad it a 93, No point to adjust. __________________ When i die, i dont want to walk gracefully thu the pearly gates and turn in a unused body. i want to go sliding thru sideways and turn in a body that has been completely used up.

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09-21-2006, 08:55 PM	#2
bradrhale Moderator Join Date: Apr 2006 Location: Texas Posts: 3,609	start at the plugs and work your way backwards. if no fire at the plug, see if the coil is firing. if it is, look at the rotor under the distributor. the dizzy might have a crack in it also. if the coil is not firing, it could be a bad coil or that the points in the dizzy need to be replaced or adjusted. dwell meter will take care of that. make sure that you are getting power to your coil from the ignition. turn the key to on position and test for 12v at the positive post. if no power, problem with ignition. and thats ignition 101. if i remember right, they didnt start using SFI til 95 or 96 so that would put you with TBI. if they are not spraying, i would check the power supply to the fuel injectors. since you are having power problems now, i have to wonder if you have some shorted out wires or bad fuses. i would look into that before you go diving into all that other garbage i have already talked about.

09-22-2006, 06:50 AM	#4
bradrhale Moderator Join Date: Apr 2006 Location: Texas Posts: 3,609	sorry, skipped over that part. knew i was forgetting something.

09-22-2006, 01:53 PM	#5
Jonc Junior Member Join Date: Sep 2006 Posts: 2	Ok This what I done to it. Replaced plug wires, Dist.Cap, rotor, coil, little module located inside dist. thats bolted below the rotor on back side of distributor and fuel relay. Pick up cranked up run smooth, drove it for about 20 minutes and is doing the same exact thing again. Got it back home by putting excelerator all the way to the floor. Turned the motor off when I got home tried to crank it 30 minutes later with no luck. Checked it over and it is not getting fire to the plugs or spraying fuel. Exact same thing as before. Does anyone know if it could be the computer. Thanks

09-25-2006, 08:44 AM	#6
gmcman Junior Member Join Date: May 2006 Posts: 9	what no codes

10-05-2006, 11:54 AM	#7
mr. goodwrench Junior Member Join Date: Oct 2006 Location: ccalifornia Posts: 3	hey try replacing you ignition module the module on your distibutor under the rotor if it goes out you lose spark and fuel. i know you replaced it but did you but the grease that ocomes with it between the module and the distributor. if not it will over heat and fail quickly, like after a 30 minute test drive. hope I helped and good luck

10-11-2006, 09:55 AM	#8
cookcs Full Member Join Date: Oct 2006 Location: Muskegon, MI Posts: 30	How about changing the fuel filter.