Engine shuts off bogs down while on highway and stalls?

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
CHARLENE3
  • MEMBER
  • 1 POST
  • 1997 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
I replaced intake manifold and gaskets. When I put everything back together, the engine will not stay running. Has a hard start, doesn't seem to be getting enough fuel. Ran just fine before replacement of gaskets.
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
HANDYRANDY1027
  • MEMBER
  • 8 POSTS
Sounds to me like your fuel pump is going out or mabe your fuel filter is stoped up. Try pouring a litle gas in the throtle body and see if it starts easy and runs for a moment. If it does try changing the fuel filter. On the driverside mounted to the frame right under the cab is the fuel filter. If that does not work change the fuel pump. Good luck.
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
8736ANDREW
  • MEMBER
  • 2 POSTS
  • 1997 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
The truck will start and run for about 2-4 seconds. Then the truck stops running. Fuel pressure stays at 50 psi. Has new plugs and wires and problem was there before all this was replaced. Also no codes present in the vcm.
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
It sounds like the security system is shutting it down. Is the light staying on or flashing? Have you tried a different key?
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
8736ANDREW
  • MEMBER
  • 2 POSTS
The key is not a chip key. The security light is not coming on at all. I dont think it has a security light. I only have the one key and I have used it for about 3 years.
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+2
Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
PB_PAUL
  • MEMBER
  • 2 POSTS
  • 1997 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 155,000 MILES
Engine cuts out when I give it the gas, it will cut out if its running and parked or driving and I hit the gas fast but will not if I give it gas slowly, has no power. I have replaced the fuel pump and fuel regulator, cleaned the injectors, new fuel filter. I had a obd scan done and it brought up one code only saying fuel cap was bad, I replaced cap, I have checked all lines and seam fine. I did have the distributer out when I replaced the intake gasket, could it be off a tooth as I did not check timing afterward but runs smooth otherwise. Someone sugjested catiletic converter bad? Any sugjestions? I'm at a loss. Any help would be great! Thanks
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
It sounds like either a bad vacuum leak, or the catylatic converter may be plugged. If you drive it at night, when you stop, let the engine run and look at the converter to see if it is glowing red hot. If it is, it's plugged. Also, use a timing light to make sure the timing it right. A tooth off can cause many problems.

Let me know what you find.

Joe
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-1
Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
PB_PAUL
  • MEMBER
  • 2 POSTS
Thank you! I will have the local exaust shop check the cat and go from there.
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Let me know what you find.
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
NTAHTINEN
  • MEMBER
  • 1 POST
  • 1997 CHEVROLET SILVERADO
  • 6 CYL
  • 2WD
  • MANUAL
  • 14,000 MILES
I have a 97 silverado that will start up fine and idle fine, but it seems as soon as it warms up the engine dies, I have recently replaced the fuel filter and fuel pump and I was wondering what else it could be?
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
JASONRAY
  • MECHANIC
  • 213 POSTS
Sounds like the Ignition Control module is shutting down when it gets hot. Common! Replace it. If you want to be absolutely sure, when it dies, try to restart it. If it doesn't start, check for spark. If no spark is present, that's it.
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
MANZOLARRY24
  • MEMBER
  • 28 POSTS
  • 1997 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 165,000 MILES
When you try to start it runs then shuts off. Shows a 1626 code, replaced the key tumbler and tried the ten minute relearn. Have purchased a stellar alarms bypass module, but the wiring diagram does not show the right color wires for my truck. Does this year even have a factory security system in it? It looks like someone had removed something because there are wires cut coming off of the ignition switch.
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
STEVE W.
  • MECHANIC
  • 12,992 POSTS
Cut wires are never a good thing. Sounds like it had an after market alarm/remote start or similar and they did not remove it correctly. That can always cause problems.
VATS started in late 1997. (Does your truck have a security light?)
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
MANZOLARRY24
  • MEMBER
  • 28 POSTS
There was no bulb in the socket on the insterment cluster so I put one in it, I'm pretty sure the key has a transponder in it and the truck has the box by the ash tray that's supposed to be the BCM I believe. The other codes it put out are 0452, 0463, u1041. It will stay running if a constant supply of fuel is put through the air intake, and it has good fuel pressure at relief valve
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Thursday, September 3rd, 2020 AT 12:30 PM (Merged)
Tiny
STEVE W.
  • MECHANIC
  • 12,992 POSTS
VAT used the resistor in the key, 97 wouldn't have a transponder.

P0452 EVAP System Pressure Sensor/Switch Low (fuel tank pressure sender)
P0463 Fuel Level Sensor Circuit High Input
U1041 - Electronic Brake Control Module Missing Data

I would get a good wiring diagram and fix the wiring, then see what it does.
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Thursday, September 3rd, 2020 AT 12:31 PM (Merged)
Tiny
TILLYMOMOF2
  • MEMBER
  • 3 POSTS
  • 1997 CHEVROLET SILVERADO
Engine Performance problem
1997 Chevy Silverado 6 cyl Two Wheel Drive Automatic

When you are accelerating and idling it will lag and it seems to want to die. We have cleaned the carburator and put a new fuel filter and new spark plugs and wires in. Also put in fuel cleaner. Now we are just drawing a blank on what it could be. Would you have any suggestions?
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Thursday, September 3rd, 2020 AT 12:31 PM (Merged)
Tiny
PEAR69
  • MECHANIC
  • 1,482 POSTS
Are you sure this truck has a carburator? Is the engine stock? Did you change the distributor cap and rotor? How many miles on this truck?
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Thursday, September 3rd, 2020 AT 12:31 PM (Merged)
Tiny
PEAR69
  • MECHANIC
  • 1,482 POSTS
What type of modifications did you do to the computer to put a carburator on this engine? In your PM you stated that you didn't change the "rotors". There is only one distributer "rotor". I do not mean the brake rotors--I mean the distributer rotor---and yes it will make a difference.
You say your engine has a carburator so I must take your word for it, and this rules out fuel injector problems--so--with 200000 miles on it; it's probably time to rebuild the carb. What type of carburator is on this engine? 4 barrel or 2 barrel? Is your fuel pump mechanical or electric?
Check the floats in the carb, they may be sticking. Varnish sometimes builds up and causes them to stick.
Check the spacer gasket between the carb. And the intake--it may be leaking.
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Thursday, September 3rd, 2020 AT 12:31 PM (Merged)
Tiny
JNOR
  • MEMBER
  • 1 POST
  • 1997 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 155,000 MILES
Several days ago I was driving and my engine just stopped. I had been driving on the freeway for about 10 miles. When I tried to restart it, it would turn over but would not start. After a couple minutes it started up. I continued on and about 5 miles further, it died again. After a few minutes it started. The next morning I was on my way to work which is about 20 miles it stopped 4 times. I took it to a Chevy dealer. They would not drive it to duplicate it but let it run for a couple days when it finally died. They replace the fuel pump, some kind of harness in the fuel tank and a oil pump switch. I picked my truck up and it was fine that day. The following day it died again. I took it back to the dealer and they could not find anything else wrong.

Up until the first time it stalled, I did not have any problems. When the truck had about 65,000 miles on it, they replaced a fuel pump but at that time when the engine stopped, it would not restart after a few minuets.

The dealer is stumped. Is there something else I could have them check?
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Thursday, September 3rd, 2020 AT 12:31 PM (Merged)

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