Engine will not start?

Tiny
MIKE RIGGS
  • MEMBER
  • 1987 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Would not start so I poured gas into throttle body, the truck backfired and bent valve cover. I replaced and have tried to start with starting fluid but it won't fire. I replace fuel pump and filter, distributor cap. The truck fires and is getting fuel but not at the injectors. It is getting fuel up to the injectors but not coming out. I tried moving distributor but still will not fire.
Sunday, November 24th, 2019 AT 12:07 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

Power to the throttle body injection is provided by the electronic control module (ECM). Have you checked to see if there is power to the throttle body?

I attached a picture of the ECM below. The idea of moving the distributor and the tune up has nothing to do with this issue. I suspect there is a wiring issue between the ECM and the TBI. Check and confirm power to the TBI and make sure the connectors are clean and tight.

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

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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Monday, November 25th, 2019 AT 8:13 PM
Tiny
MIKE RIGGS
  • MEMBER
  • 4 POSTS
I checked injectors with noid lights and they lite up. I have found the ECM.
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Tuesday, November 26th, 2019 AT 6:29 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

If you have power to the injector and proper fuel pressure, I suspect the throttle body is bad. Are you certain the new pump is producing enough fuel pressure?

Joe
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Tuesday, November 26th, 2019 AT 6:07 PM
Tiny
MIKE RIGGS
  • MEMBER
  • 4 POSTS
I checked the fuel pressure and it is good. I also rebuilt the regulator with a kit from Jegs because it looked like it was stuck but that did not help. I will investigate getting a throttle body.
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Wednesday, November 27th, 2019 AT 6:25 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
If I recall, the regulator is internal. Is that correct? Also, I need the correct engine size. They didn't offer a 5.3L in 87.

Did you have any difficulty when you repaired the regulator?

Joe
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Wednesday, November 27th, 2019 AT 7:57 PM
Tiny
MIKE RIGGS
  • MEMBER
  • 4 POSTS
I changed the throttle body but still no start. Still no fuel coming out of Injectors and will not start even with starter fluid.
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Monday, December 9th, 2019 AT 10:04 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

Do me a favor, check to see if there are any diagnostic trouble codes. Here is a link that shows how to do it. It doesn't require a scanner. Check this and let me know what you find.

_________________________________________

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

Also, let me know the correct engine size.

Joe
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Tuesday, December 10th, 2019 AT 5:40 PM

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