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Shut off while driving no fuel or spark

Tiny
GEE 91
  • MEMBER
  • 1993 CHEVROLET 1500
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 145,493 MILES
I took the spark plug boot off that goes to the distributor and determined no spark; would not arc. I think it's called the coil pack. No fuel to the carburetor.
Monday, April 20th, 2020 AT 3:01 PM

24 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

What I need you to do first is check for diagnostic trouble codes. This vehicle has an obd1 system and a scanner is not required to retrieve codes. All that is needed is a short jumper wire or even a paper clip. Here is a link that explains how it is done. Do this and let me know the codes you find.

I have a feeling it is related to the ignition control module. If it fails, it shuts off the injectors as well. However, you still should have fuel pressure from the pump.

Try this and let me know.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Take care,
Joe
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Monday, April 20th, 2020 AT 8:19 PM
Tiny
GEE 91
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  • 19 POSTS
So I did it; codes 12 15 22.
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Tuesday, April 21st, 2020 AT 9:01 AM
Tiny
GEE 91
  • MEMBER
  • 19 POSTS
Now I know that the coolant is low because I unplugged the wire to the thermostat but would not have any merit in. What's wrong here?
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Tuesday, April 21st, 2020 AT 9:04 AM
Tiny
GEE 91
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  • 19 POSTS
Replace the sensor, code went away but still no start.
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Wednesday, April 22nd, 2020 AT 10:31 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Was it the coolant temperature sensor you replaced? That is what is related to the code 15. That sensor won't cause the no spark/fuel issue.

Just to confirm, there is no spark or fuel to the engine, correct?

Let me know.
Joe
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Wednesday, April 22nd, 2020 AT 10:48 AM
Tiny
GEE 91
  • MEMBER
  • 19 POSTS
Yes no spark or fuel. I replaced the TPS code went away.
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Wednesday, April 22nd, 2020 AT 11:30 AM
Tiny
GEE 91
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  • 19 POSTS
All codes are gone except for 12.
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Wednesday, April 22nd, 2020 AT 11:31 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
According to the manual, code 12 is a false code. Take a look at the attached pic. That is what I find when looking for a code 12. Are you certain that is the number?

Joe
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Wednesday, April 22nd, 2020 AT 4:32 PM
Tiny
GEE 91
  • MEMBER
  • 19 POSTS
Yes 1 flash then 2 flashes.
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Wednesday, April 22nd, 2020 AT 8:26 PM
Tiny
GEE 91
  • MEMBER
  • 19 POSTS
I'm confused about what you mean by the picture. Can you explain it a little bit?
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Wednesday, April 22nd, 2020 AT 8:27 PM
Tiny
GEE 91
  • MEMBER
  • 19 POSTS
Yea, I have done it more than 1 time.
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Wednesday, April 22nd, 2020 AT 8:29 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Basically, I attached the pic so you could see, according to Alldata, there is no relevant code for 12. Have you checked for a good ground and power to the PCM?

Joe
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Wednesday, April 22nd, 2020 AT 8:37 PM
Tiny
GEE 91
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  • 19 POSTS
How do I check the PCM?
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Thursday, April 23rd, 2020 AT 10:05 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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First, before you unplug or reconnect any control module (PCM) make sure the battery is disconnected. You can reconnect the battery after the component is disconnected or reconnected.

I attached a pic of the location of the PCM. To start, first locate and confirm the connections are tight. If they are, disconnect the battery and then unplug the PCM. Check for corrosion, dirt, or any damaged pins.

Let me know what you find.

Joe
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Thursday, April 23rd, 2020 AT 6:25 PM
Tiny
GEE 91
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Not to bad.
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Monday, April 27th, 2020 AT 10:05 AM
Tiny
GEE 91
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Got it running, but running rough.
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Monday, April 27th, 2020 AT 6:59 PM
Tiny
GEE 91
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  • 19 POSTS
Replaced the ICM.
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Monday, April 27th, 2020 AT 6:59 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Great! Have you rechecked for diagnostic trouble codes that may indicate the cause of the rough running?

Joe
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Monday, April 27th, 2020 AT 8:38 PM
Tiny
GEE 91
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Yes.
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Monday, April 27th, 2020 AT 9:03 PM
Tiny
GEE 91
  • MEMBER
  • 19 POSTS
Not sure if It's fuel filter or pickup coil.
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Monday, April 27th, 2020 AT 9:04 PM

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