1998 gmc 5.7 crank, no start - Chevrolet Forum - Chevy Enthusiasts Forums

1998 gmc 5.7 crank, no start


  Reply  
Sbrown47's Avatar
CF Beginner

Join Date: Sep 2016
Posts: 1

September 17th, 2016, 1:03 PM   #1  
1998 gmc 5.7 crank, no start

Im issue for months, need help please.
Truck turns over, no start. I replaced plugs, wires, coil pack, distributor cap, button, cam shaft pos, crankshaft pos, spider injectors. Just hit 80k miles, number 3 5 7 plugs are sooty and dry, the rest are wet and clean. Compression good, fuel pressure regulator getting full pressure at crank, but slightly drops when shut off. The regulator is new, on the new injectors. Does this sound like my new.part is bad?

 
Spencer Kitchen's Avatar
CF Beginner

Join Date: Sep 2016
Posts: 11

September 26th, 2016, 12:22 PM   #2  
are the starter wires shot

 
MistaScissors's Avatar
CF Beginner

Join Date: Nov 2016
Posts: 8
Boise, ID

November 30th, 2016, 12:53 AM   #3  
How about your ignition control module?
That was the culprit for my crank/no start.
The coil, cables, plugs and dist. cap we're all new, turned out that 25+ years of heat fried my control module.
You can take it in and have it tested.

 
Rednucleus's Avatar
CF Senior Member

Join Date: Jul 2014
Posts: 565
Marysville, WA

November 30th, 2016, 9:15 PM   #4  
Posted By: MistaScissors How about your ignition control module?
That was the culprit for my crank/no start.
The coil, cables, plugs and dist. cap we're all new, turned out that 25+ years of heat fried my control module.
You can take it in and have it tested.
I'm on my 3rd one in our '93 Sub

 
MistaScissors's Avatar
CF Beginner

Join Date: Nov 2016
Posts: 8
Boise, ID

December 2nd, 2016, 4:21 PM   #5  
Ok, it seems that you have most of your electrical taken care of,
but what i would do first is find out if your plugs are getting a proper spark,
and make sure your battery leads and leads to your starter are getting a good connection.
Get a spark plug tester and make sure all plugs are functioning properly.
If they all are then I would suggest it be a fuel issue,
but other possibilities could even be the throttle position sensor or coolant temp sensor.
both of which will reduce the amount of fuel while starting if not working properly.

 
Search this Thread
Sponsors
Sponsors
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: