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Engine shuts off when transmission is put in gear

Tiny
ICVMC
  • MEMBER
  • 1998 CHEVROLET 1500
  • 260,000 MILES
This truck has set for one year and ran fine before that. Now you can start the truck and the engine will run at idle all day but when you put the truck in gear it shuts off and you have to hold the accelerator to the floor to get it to restart and then it will shut off again. You let the truck set for several hours and it will start back up idle but still goes through the same problem.
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Thursday, November 15th, 2018 AT 6:49 AM

25 Replies

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

The first thing I would do since it has sat for so long is to drain the fuel tank, have it flushed out, replace the fuel pump and change the filter.

The old fuel is most likely the issue that will not allow it to work.

Roy

REMOVAL PROCEDURE
1. Drain the fuel from the tank. Refer to Draining Fuel Tank.
2. Raise the vehicle.

Diagram
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3. Loosen the filler neck hose clamp at the fuel tank and disconnect the fuel tank filler neck from the fuel tank.

Diagram
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4. Support the fuel tank and remove the tank straps and insulator strips, it equipped.

Diagram
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5. Remove the frame mounted bracket.

Diagram
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6. Lower the fuel tank shield.

Diagram
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7. Lower the fuel tank.

Diagram
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8. Disconnect the fuel feed and vapor hoses. Disconnect the electrical connections at the sender.

Fuel Sender Assembly
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9. Remove the fuel sender assembly and seal ring, using tool J 39785. Discard the old seal ring. Purge the tank, if the tank is being repaired.
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Thursday, November 15th, 2018 AT 7:35 AM
Tiny
JONNYB1963
  • MECHANIC
  • 252 POSTS
Welcome to 2CarPros!

Lets see if we can get to the bottom of this together. Can you answer some more questions just to get me more familiar with the problem.

When the engine is running at idle and in park, if you were to rev the engine and take your foot off the pedal, will it also stall?

When the engine requires you to floor-it in order to restart, what happens when it does start? Do you see black smoke coming from the exhaust when it finally fires? Also, when it does restart will it stay running as long as you have your foot on the gas? Will it stall if you take your foot off the gas?

If you could answer these it would be very helpful to get me looking in the right direction. Vehicles that sit for a long time without being used can develop glitches. Lets see if we can find out what this is.

Thanks,
Jon
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Thursday, November 15th, 2018 AT 7:38 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
I need to let you know that the fuel pressure sets between 56 and 60 when Idling, I cannot get a reading when in gear because engine stops.
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Thursday, November 15th, 2018 AT 9:22 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It should stay the same when the engine is off. If it drops, then you have a fuel pump issue.

Did you drop all the old fuel and clean the tank? Stale fuel will cause this issue.

Roy
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Thursday, November 15th, 2018 AT 9:35 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
I need to let you know that the fuel pressure sets between 56 and 60 when Idling. But I cannot get a reading when fear because truck shuts down.
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Thursday, November 15th, 2018 AT 9:40 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
Non I did not drain fuel yet. But pressure remains the same with truck off.
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Thursday, November 15th, 2018 AT 9:41 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
Did you get my last reply?
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Thursday, November 15th, 2018 AT 10:34 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
Question #1 is, because I have not checked the exhaust. Question #2, truck will not stay running with foot on gas. Question #3, yes.
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Thursday, November 15th, 2018 AT 12:15 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, I still feel fuel quality is your issue. You need to start with getting rid of the bad fuel and starting with new fuel.

Roy
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Friday, November 16th, 2018 AT 4:03 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
Okay, thank you. I will do that first and let you know if I have anymore issues. Thank you for time and patience with me.
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Friday, November 16th, 2018 AT 4:32 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

We are always glad to help.

Roy
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Friday, November 16th, 2018 AT 5:08 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
Fuel pressure stays the same with engine off in accessory. When engine running in idle you can accelerate and let off quietly the truck will shut off and have a hard time restarting.
I put new gas in without drain tank.
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Thursday, March 14th, 2019 AT 10:13 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The old fuel will still stay contaminated. New fuel does not change stale fuel.

Roy
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Thursday, March 14th, 2019 AT 2:23 PM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
Thank you.
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Thursday, March 14th, 2019 AT 4:25 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
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Thursday, March 14th, 2019 AT 4:27 PM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
If a fuel pump shows 60 psi in accessory and drops to 52 psi when running park is this normal?
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Friday, March 22nd, 2019 AT 5:33 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, that is normal. A small drop is normal.

Roy
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Friday, March 22nd, 2019 AT 5:44 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
What about a fluctuation when running or a bounce between 50 to 53 while running in park?
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Friday, March 22nd, 2019 AT 6:29 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, that is not normal at all. It should be rock solid with no variations.

Roy
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Friday, March 22nd, 2019 AT 6:31 AM
Tiny
ICVMC
  • MEMBER
  • 16 POSTS
What could be the issue?
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Friday, March 22nd, 2019 AT 7:45 AM

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