96 GMC Sierra hesatation when throttle is pressed


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Grounding Cable, 2017 Jeep Renegade Trailhawk

The Cable that connects my negative batt...

Rough Idle (Found new thing)

Hi everyone. First of all sorry for bad ...

equipment

hey yall. im a first year engineering st...

HELP

I have a 1956 1/2 ton panel truck, 69 35...

Howdy

    Just wanted to s...

ABS/Tractiob/Brake Lights on But No DTCs

Hello all, Recently while driving m...

Chevy strut replacement

I'm trying to get a sensor of some kind ...

2020 suburban new transmission and issues after install

recently had the transmission fail at 11...

2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes

When I bought this car in summer 2023, a...

Caliper piston post cleaning won't screw in

Hello, 2013 Hyundai Elantra limited (ma...

96 GMC Sierra hesatation when throttle is pressed

Sign up here!

Email This Post

Auto Repair Home>> Truck Repair>> Truck Repair Advice

mechneck72
New User

Apr 26, 2011, 8:30 PM

Post #1 of 4 (2880 views)

96 GMC Sierra hesatation when throttle is pressed	Sign In

i am working on a 1996 GMC sierra it has a 5.7. i've replaced the fuel pump it worked fine after that when my mother in law brought it back from a long trip it would die out if you hit the throttle so i replaced fuel filter. that didn't fix the problem so i replaced the fuel pressure regulator now it will hessatate and back fire and almost die out when you hit the throttle ive asked numerous friends and we are all puzzled. It has 50 to 55 psi fuel pressure when running and when its not running it has 50 to 55 psi fuel pressure until the pump shuts off then it drops down to 10 to 15 psi. Any help you could give me would be much appreciated

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 27, 2011, 4:34 AM

Post #2 of 4 (2858 views)

Re: 96 GMC Sierra hesatation when throttle is pressed	Sign In

There is your problem. Your fuel pressure is too low. This engine requires a minimum of 55 PSI to run. The spec is 56 to 62PSI. I suspect that you probably purchased a cheap discount fuel pump and it has failed already.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

mechneck72
New User

Apr 27, 2011, 11:45 AM

Post #3 of 4 (2850 views)

Re: 96 GMC Sierra hesatation when throttle is pressed	Sign In

thanks ill try it i hope this works

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 27, 2011, 11:47 AM

Post #4 of 4 (2848 views)

Re: 96 GMC Sierra hesatation when throttle is pressed	Sign In

Make sure you verify power and ground at the pump before condemning it.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Email This Post

Search for (options) Privacy Sitemap