Chevy CK3500 Vortec 5.7L 150,000 miles Won't stay runni


	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

Drive Shaft Repair

I have a 2015 Chevy Traverse AWD. The fr...

2006 Toyoto Camry XLE Driver Side Electric Window Trouble

Hello, Looking for a little brain help ...

Tierod end change caused some kind of leak

Hello so I just took my car to the nearb...

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

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

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 CK3500 Vortec 5.7L 150,000 miles Won't stay running

Sign up here!

Email This Post

Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

MiRepo
New User

Oct 15, 2009, 10:33 AM

Post #1 of 5 (4281 views)

Chevy CK3500 Vortec 5.7L 150,000 miles Won't stay running	Sign In

Help me before I kill my truck. My Chevy 5.7L Vortec 150,000 miles. Replaced fuel filter when I was noticing bad mpg. Then a week after my truck was idling and would lose rpm and stall. Replaced fuel pump. Still would idle for one minute and stall. Replaced egr valve, still same problem. Replaced every single sensor, new battery and cables, took apart intake, checked injectors, all fine. Still same thing idle and then stop. Rented a computer to diagnose problem, no code tried this for twelve hours still no code . Rented a fuel pressure gauge and found that the fuel filter I first purchased was bad replaced again, and again, and again. Now I believe I blew my fuel regulator and the wiring harness. I have spent over $1600 in parts on this truck in less than two weeks I'm out of money need to get back to work. I wanted to bypass the wiring harness by installing a toggle switch to manually turn on the fuel pump. Can anyone give me an idea of what the heck is wrong and how I can get this thing running for less than $100. PS I've had two mechanics over and this is what their telling me to do, but even they can't figure out whats going on. Each step I take doesn't resolve the issue. Help!

milling machine
User

Oct 15, 2009, 5:55 PM

Post #2 of 5 (4273 views)

Re: Chevy CK3500 Vortec 5.7L 150,000 miles Won't stay running	Sign In

You should check out Jim Linder's article on the vortec's fuel system it might help you.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 15, 2009, 6:03 PM

Post #3 of 5 (4269 views)

Re: Chevy CK3500 Vortec 5.7L 150,000 miles Won't stay running	Sign In

Forget the toggle switch nonsense.

What exactly is the truck doing? Is it just stalling and starting right back up?

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

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.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 18, 2009, 4:02 PM

Post #4 of 5 (4246 views)

Re: Chevy CK3500 Vortec 5.7L 150,000 miles Won't stay running	Sign In

Taken from second question started

Quote

Thanks for the feedback. I've had two more mechanics out here and they still are just confused as I am. The mechanic was the person that recommended the toggle switch idea. Now I've added a new starter to the new parts list. Sometimes it starts and sometimes it doesn't. When it does start it will sometimes run for one minute and other times for a few hours. I still am disgusted and pretty much totally fed up. Any suggestions, please let me know. All I can think to do is put a good carb on this thing. It seems to only want to run when I pour fuel down the throttle body. I still want to kill my truck, but I I love it.

I have deleted the new question you started. If you expect anyone to be able to help you then you need to stay in one question and be a lot more clear of exactly what your problem is and what the truck is or isn't doing so we can follow this.

It sounds like what you need to do is use a fuel pressure gauge to monitor what your fuel pressure is doing. This engine is very pressure sensitive and even a few pounds below the factory spec of 55-60 psi and Open Throttle 66 psi

will cause it not to start

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

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.

(This post was edited by Hammer Time on Oct 18, 2009, 4:03 PM)

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 20, 2009, 11:33 AM

Post #5 of 5 (4232 views)

Re: Chevy CK3500 Vortec 5.7L 150,000 miles Won't stay running	Sign In

Quote

Ok, I'll explain in detail again.
parts replaced
1. iac valve
2. egr
3.mass air sensor
4.crank trigger
5. fuel regulator (sucked bad great engineering)
6.fuel relay
7. now the fuel pump will only cycle one time and then no more. not sure if the computer is telling the fuel pump what to do or what
8. should i replace the computer??????????
help please i have been working on this for three weeks and still nothing ( oh yea if i hook fuel pump direct to battery the truck will idle but will not rev at all just noses ove and dies )

Please stop creating new questions

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

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