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Engine will not run

Tiny
BROKENTONGUE
  • MEMBER
  • 1994 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
While I was driving slow it quit running, did the same thing a week before but started after two days. Can hear the fuel pump run. But does not start now.
Wednesday, November 22nd, 2017 AT 10:58 AM

79 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
The first thing we have to find out is what is causing it, fuel or spark. The easiest thing to do is see if it will start using starting fluid. If it does for a couple seconds, then it is fuel related. If it does not, then there is no spark to the plugs. Try that first. Also, let me know if you have checked for trouble codes?

This guide can help

https://www.2carpros.com/articles/car-cranks-but-wont-start

Cheers,
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Wednesday, November 22nd, 2017 AT 4:12 PM
Tiny
BROKENTONGUE
  • MEMBER
  • 2 POSTS
Will not run on starting fluid, the code is flash pause flash flash, then long pause and repeat flash pause flash flash. Thinking it must be something with the spark.
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Monday, November 27th, 2017 AT 7:53 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Yep that is what it sounds like. The code it is trying to tell you is 12 which means it cant find anything wrong which leads us to the ignition coil, module and pick up. Here is a guide to ehlp you get these components changed out I recommend AC Delco from Amazon.

Here are some diagrams that shows how to remove the distributor, ignition pickup and coil assemblies. (Below)

Please let us know what happens.

Cheers, Ken
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Wednesday, November 29th, 2017 AT 12:30 PM
Tiny
AIKENM
  • MEMBER
  • 11 POSTS
  • 1994 CHEVROLET TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 165,000 MILES
Engine Mechanical problem
1994 Chevy Truck V8 Two Wheel Drive Automatic 165000 miles

Here goes,
Turns over but will not start,
1. Fuel pump works- removed filter temporarily blows gas a plenty (hoping it would catch fire)
2. Replaced rotor, cap, coil, and eventually distributor. Could get to small coil below firing points.
Checked all fuses, swapped 30amp ones after checking with meter.

Stumped from here
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Thursday, November 30th, 2017 AT 10:30 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.
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Thursday, November 30th, 2017 AT 10:30 AM (Merged)
Tiny
AIKENM
  • MEMBER
  • 11 POSTS
KISS, after replacing the distributor, I neglected to get both the plugs back on the rear of the disto. I had correctly identified the small coil pick up on the bottom of the timing inductors.

OH well. Looking for the timing specs now
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Thursday, November 30th, 2017 AT 10:30 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
For what liter/CID engne?
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Thursday, November 30th, 2017 AT 10:30 AM (Merged)
Tiny
AIKENM
  • MEMBER
  • 11 POSTS
5.7 350
seems the inductive pickup went south, there was iron dust all in the bottom of the distributor
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Thursday, November 30th, 2017 AT 10:30 AM (Merged)
Tiny
DAVEWITHDIESEL
  • MEMBER
  • 14 POSTS
  • 1994 CHEVROLET TRUCK
  • 250,000 MILES
94 6.5 (f) turbo diesel does cracked injector line no fuel replaced PMD it use to stall out kept old both no start no high pressure fuel the lift pump is flowing cracked a low pressure line and you can hear the pump kick on and fuel flows had a bad wire on the crankshaft sensor replaced that I can feel the shutoff solenoid click could I have gotten a faulty pmd and that fried my injection pump can I buy parts for the injection pump
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Thursday, November 30th, 2017 AT 10:30 AM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Injection pumps are extremely sensitive items, they must be set up for flow rates and delivery pressures using very specialized calibrating equipment, not to mention the special tooling required, this really should be left to the specialists, with incorrect delivery you can destroy the engine.
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Thursday, November 30th, 2017 AT 10:30 AM (Merged)
Tiny
JHUFF74
  • MEMBER
  • 6 POSTS
  • 1994 CHEVROLET TRUCK
  • 160,000 MILES
I changed the ECM and it ran for about 30 minutes and then shut back down. Now I can't get it to start.
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JHUFF74
  • MEMBER
  • 6 POSTS
I meant it is NOT getting gas
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Why did you change the ecm? Use a gage and check fuel pressure. If your tbi, you have to tie into the supply line. Sometimes it is easier to tie in at the fuel filter, if the engine compartment is really cluttered. Just make sure no pressure on the system, before you take anything loose. Any applicable trouble codes?
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JHUFF74
  • MEMBER
  • 6 POSTS
Truck was not getting gas or firing, changed ECM, ran for about 30 min. Then shut back down. It does have 12 volts going to coil
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JHUFF74
  • MEMBER
  • 6 POSTS
No codes
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JUSTIN087
  • MEMBER
  • 5 POSTS
  • 1994 CHEVROLET TRUCK
Okay, first off, the battery went dead, I did try to jump start it with my other car, and it would not start, so I took the battery to Advance for a test and they told me the battery was bad, so I purchased a new one. When I tried starting it after I hooked the new battery up, all I hear is a click when I turn the key (it is not coming from the starter, it is coming from the ignition switch inside the truck). What I want to know, is there a relay switch or fuse somewhere in there that could have blown when I tried jump starting it? I can't locate a fuse box under the hood. I am pretty sure the battery is properly connected because the headlights light up and everything else works except the starter (I brushed the terminal wires clean several times). Any help would be appreciated.

1994 Chevrolet S10
4.3L Vortec Engine
120,000 Miles
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The one that's clicking might be a starter relay- your problem could be the solenoid or the starter itself

To confirm a starter control circuit problem-remote start it at the starter. When it kicks over with the remote starter switch this is the point where you troubleshoot.
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What is litre size of engine? Engine cranking, do you have spark at the plugs.

You can take spark plug wire loose, use spark tester in boot, ground metal part of tester to metal part of engine, engine cranking watch for spark. Is there spark?

If something is causing the ecm to go bad, you need to fix that issue, first.
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JUSTIN087
  • MEMBER
  • 5 POSTS
Where do I look for that? I never had problems like this before, I am totally in the dark on this one.
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
With engine cranking, it's the ignition module that controls spark. Do you have TBI fuel injection? If the computer doesn't see an rpm signal, no injector pulse. The rpm signal comes from the pickup coil to the ignition module to computer for distributor ignition.
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Thursday, November 30th, 2017 AT 10:31 AM (Merged)

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