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Fuel pump and tank replacement

Tiny
DYLAN ROBERT
  • MEMBER
  • 1997 CHEVROLET SILVERADO
  • 180,000 MILES
I put in a new tank and fuel pump assembly well as a fuel filter.
I even replaced the fuel pump relay.
put in the old gas and put sea foam gas treatment in the tank.
I still cannot get it to start.
Saturday, August 6th, 2016 AT 3:33 PM

12 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try another key if you have one it may be security messing up. Not a new one as they have to be programmed to your truck. Then see if you have fuel pressure 60-66 psi and spark or spray choke cleaner down tbi if it starts then that is probably the reason. And Yes you have anti theft on your vehicle.
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Saturday, August 6th, 2016 AT 3:51 PM
Tiny
DYLAN ROBERT
  • MEMBER
  • 7 POSTS
I already put some gas in the throttle body. And covered with rag as well. No go.
I have no way of checking the psi either. And I only have one key.
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Saturday, August 6th, 2016 AT 4:09 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Auto parts rent gauge, but if gas in tbi did not work then there is probably no spark. But it still could be security sytsem doing it.
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Saturday, August 6th, 2016 AT 4:29 PM
Tiny
DYLAN ROBERT
  • MEMBER
  • 7 POSTS
I pulled the security system fuse and it still did not start.
Do you think it could be the spark plugs?
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Saturday, August 6th, 2016 AT 5:27 PM
Tiny
DYLAN ROBERT
  • MEMBER
  • 7 POSTS
Okay, I pulled the old spark plugs and they were so burnt and worn I do not see how they were working.
I put all new spark plugs into and it still did not not start
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Saturday, August 6th, 2016 AT 8:47 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It may be the security system if your key does not work a mechanic will have to scan for codes to see what it is as auto parts scanners can only check engine/transmission things not security.
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Sunday, August 7th, 2016 AT 11:44 AM
Tiny
DYLAN ROBERT
  • MEMBER
  • 7 POSTS
The fuel pump is turning on but there is no fuel getting to the injectors.
I checked the lines and there is zero presser in the fuel lines.
It is getting a spark.
So I am pretty sure it is the fuel pressure regulator.
I am going to put it in in a couple days and I will get back to you if it worked or not. But I think that is the problem.
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Sunday, August 7th, 2016 AT 3:14 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If the pump is turning on and zero pressure, was it installed correctly and not upside down? Also check for blocked filter or lines.
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Sunday, August 7th, 2016 AT 3:31 PM
Tiny
DYLAN ROBERT
  • MEMBER
  • 7 POSTS
Yes I installed it correctly.
And I put in a new fuel filter as well.
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Sunday, August 7th, 2016 AT 8:24 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Did the new pump have a new harness piece with it? Some these had this problem and had to have the harness replaced. I will leave this question open and send to another person.
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Monday, August 8th, 2016 AT 7:29 AM
Tiny
DYLAN ROBERT
  • MEMBER
  • 7 POSTS
The new pump came already installed in the new tank.
I just connected every thing and strapped on the new tank
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Monday, August 8th, 2016 AT 8:47 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hi Dylan,

First thing you want to do is plug a plug after cranking it over to see if there is fuel on the plug, if not then its a fuel problem, if so then its a ignition problem. Here are some guides that will help you check for both.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

and

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

and

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

Let us know what you find.

Best, Ken
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Monday, August 8th, 2016 AT 9:22 AM

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