Will not start

Tiny
BILL71
  • MEMBER
  • 1996 GMC TRUCK
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 155,000 MILES
I was coming home from trip when it cut out and quit running. I replaced distributor due to wear on it. I just did a complete tune up. I thought it might be fuel related check filter fuel pump. Then I decided to try starter fluid to get it to start. It backfired through tail pipe and throttle body. I am not sure where to go next. I would deeply appreciate any help!
BTW I had new distributor put in by ASE certified mechanic!
Tuesday, May 15th, 2018 AT 2:35 PM

11 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

Sorry, I just saw this on the board.

What have you tried so far?

Roy
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Saturday, May 19th, 2018 AT 1:03 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
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Okay.

Have you check for spark and fuel pressure?

If you crank the engine, will the tachometer move a little? That will tell us if the crank sensor is working.

Roy

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

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Saturday, May 19th, 2018 AT 1:13 PM
Tiny
BILL71
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  • 8 POSTS
I just turned it over and it is not moving at all. You can hear pressure popping through the throttle body like a rush of air pushed hard through it! Yes plenty of fuel pressure!
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Saturday, May 19th, 2018 AT 1:24 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, time to check compression. Check it to be sure you do not have a bad timing chain.

Also, I am concerned that the distributor is not installed correctly.

Roy

https://www.2carpros.com/articles/how-to-test-engine-compression

1. Bring cylinder number one piston to Top Dead Center (TDC) of compression stroke.

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2. Install the distributor cap screws.
3. Install the distributor cap.

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4. Install a NEW distributor gasket onto the distributor.

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5. Align the indent hole on the driven gear with the paint mark on the distributor housing.
5. Ensure that the distributor rotor segment points to the cap hold area.

imageZoom/Print

7. Align the slotted tang in the oil pump driveshaft with the distributor driveshaft. Rotate the oil pump driveshaft with a screwdriver if necessary.
8. Align the flat (1) in the distributor housing toward the front of the engine.
9. Install the distributor and distributor clamp.

imageZoom/Print

10. Once the distributor is fully seated, align the distributor rotor segment with the number 8 pointer that is cast into the distributor base.
11. If the distributor rotor segment does not come within a few degrees of the number 8 pointer, the gear mesh between the distributor and camshaft may be off a tooth or more. Repeat the procedure in order to achieve proper alignment.

imageZoom/Print

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

12. Install the distributor clamp bolt. Tighten the distributor clamp bolt to 25 Nm (18 ft. lbs.).

imageZoom/Print

13. Install the distributor cap onto the distributor.
14. Install the NEW distributor cap screws. Do not overtighten the NEW distributor cap screws. Tighten the distributor cap screws to 2.4 Nm (21 in. lbs.).

imageZoom/Print

15. Install the ignition coil wire harness.
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Saturday, May 19th, 2018 AT 1:31 PM
Tiny
BILL71
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I had distributor installed by a shop. I will check pressure to see if timing chain is bad. It will be tomorrow before I can get the tools from a friend. Thanks I really really appreciate your time. I am very glad that you are answering me. I will let you know what I figure out. Thanks again Roy!
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Saturday, May 19th, 2018 AT 1:39 PM
Tiny
ASEMASTER6371
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You are welcome.

You need to verify the distributor was installed on top dead center compression. Everybody makes mistakes. That is why I want you to verify.

Roy
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Saturday, May 19th, 2018 AT 1:47 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
Well, I thought I had questioned the distributor's installation in this post.

Do not even see me at all in here.

Still anxious to see if that is the deal.

The Medic
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Saturday, May 19th, 2018 AT 2:06 PM
Tiny
BILL71
  • MEMBER
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CJ, I will post as soon as I figure it out. I had it installed by ASE mechanic. I am getting gauge to test compression.
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Saturday, May 19th, 2018 AT 2:37 PM
Tiny
ASEMASTER6371
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Hi CJ.
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Saturday, May 19th, 2018 AT 2:51 PM
Tiny
BILL71
  • MEMBER
  • 8 POSTS
I know for a fact he did not put it on TDC. On first he marked the older one then installed the new one by marking on the old one and started the truck right up! So I am guessing he did it wrong then?
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Saturday, May 19th, 2018 AT 3:49 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Good possibility. You need to bring up the timing mark to TDC number one cylinder on the compression stroke. The mistake that is made is you can align the mark but it is on valve overlap instead which means the distributor is 180 out.

Roy
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Saturday, May 19th, 2018 AT 3:51 PM

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