Engine won't stay running, stalls while driving?

Tiny
TED YU
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 99,521 MILES
Hi, the engine start and stalls won't stay running, how can I relearn the computer?
Friday, December 17th, 2010 AT 11:31 PM

48 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
This is common when the throttle plate needs to be cleaned here are two guides that will help us fix the problem.

https://www.2carpros.com/articles/stall-at-idle

and

https://www.2carpros.com/articles/throttle-actuator-service

Please run down these guides and report back.
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Friday, December 17th, 2010 AT 11:40 PM
Tiny
ELLENKUMMER
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What a great post the throttle bore guide helped me fix the problem at no cost lol I love this site.
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Tuesday, September 3rd, 2019 AT 4:27 PM
Tiny
RICK1956
  • MEMBER
  • 2 POSTS
  • 2003 CHEVROLET SILVERADO
  • 6 CYL
  • 2WD
  • MANUAL
  • 90,000 MILES
Truck ran really good til about a month ago. It started to hesitate a little within a week it got worse. Then it just stalled and I had to have it towed home. I changed the gas filter and found my coil wire was bad. So I replaced that and it seemed fine. Coming home from work it started to sputter and stalled and wouldn't start. So I had it towed again. Yesterday I replaced the fuel pump but it will not stay running. It will run then wants to stall then it catches then wants to stall. And now when it runs there is a knocking sound like it's out of oil but it's full. It's a 4.3 w/90,000 mi. Thanks
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
TURNER4204
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET SILVERADO
  • 4.8L
  • V8
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
I try to start my truck and it sounds good for 2 or 3 seconds and it just dies I thought it might be fuel but I put a new fuel pump on it and new relay and it didn't help then I heard it might be a mass air flow sensor so I changed it and it is still doing the same thing I'm not sure what else to try
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try resetting security system then scan for codes if that doesn't work.
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
THIS IS MIKE
  • MECHANIC
  • 686 POSTS
Car-man145
Oct 21, 2015.

Sound like you may have a theft problem try a different key
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
DOZERDIXON
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET SILVERADO
  • 140,000 MILES
I have a 2003 Chevy Silverado 1500 5.3 8Cyl automatic w/ 4wd. I am having problems keeping the motor running. It will start (sometimes) then die randomly even with the throttle fully engaged. It will sputter a little then die. It has fuel, is getting fuel to the injectors.

Alternator problems prior, general clean bill of health, maintained well with regular oil changes at 3000 miles, recent oil change trans fluid and filter change.

This site is great! :-)
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the coolant temperature sensor, check the fuel pressure and clean out the idle air control valve, PCV/EGR valves and see what happens
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
STELLASTAR9482
  • MEMBER
  • 3 POSTS
  • 2003 CHEVROLET SILVERADO
  • 5 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
Chevy silverado 2003
is stalling when letting off of the gas to stop or slow down.
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Start back up an idle good? Check engine light on? Plugs, filters ect. In good repair?
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
STELLASTAR9482
  • MEMBER
  • 3 POSTS
Idles fine, plugs and filters are good. Check engine light has been on for a year but it is because of a upgraded muffler system. Battery did die this weekend because we were playing the radio.
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
STELLASTAR9482
  • MEMBER
  • 3 POSTS
After battery died jumped and truck started fine. The next day is when the stalling started. We did drive 350 miles yesterday on the interstate it was fine but when pulling off on the exit it would stall. So then I put it in to neutral when slowing down and it would not stall then.
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Would be helpful to have code in P0xxx format cause there is no code for a muffler
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Tuesday, September 3rd, 2019 AT 4:28 PM (Merged)
Tiny
RHODES.K
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
My truck will start fine and run fine until it warms up. Once it is warm it will shut off if I let off the gas in turns and at stop lights. It will start fine after that but will still stall with no rpm's. I have replaced the battery. The alternator was tested and was fine. I have found that the top radiator hose is warm but the bottom is ice cold. Thermostat maybe?
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Tuesday, December 31st, 2019 AT 12:40 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check air / fuel filter
do you have check engine light on
scan for codes
if not over heating and you have heat inside thermostat ok
scan for history codes
check base idle
check and clean idle air valve
check for vacuum leak
good luck
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Tuesday, December 31st, 2019 AT 12:40 PM (Merged)
Tiny
LISETH18
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 108,000 MILES
My pick-up doesn't start right away. If I give the key a turn and then another quick turn it will start up no problem. If the engine is warm it starts right up. Also it shuts off sometimes when I slow down quickly or make a sharp but slow turn but it will start right back up. What does this sound like? Thank you very much.
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Tuesday, December 31st, 2019 AT 12:40 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Check the fuel pressure regulator, mounted on the fuel rail and has a vacuum line to the intake. Pull the vacuum line at the reg and see if it is wet, if so replace it. If dry, have the fuel pressure tested with a manual gauge, might be bleeding down overnight due to weak pump
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Tuesday, December 31st, 2019 AT 12:40 PM (Merged)
Tiny
TFALC
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET SILVERADO
Engine Performance problem
2003 Chevy Silverado V8 Four Wheel Drive Automatic

I have a 2003 silverado. Yesterday getting on the hi-way, my pick up studdered and then stalled. I started it again and it was barely staying running then died again. Engine lite did come on. Any ideas on what it could be.
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Tuesday, December 31st, 2019 AT 12:40 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Since the check engine light is on I would have that scanned for codes and post them back to me to prevent throwing parts at it.
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Tuesday, December 31st, 2019 AT 12:40 PM (Merged)
Tiny
DRDREWUSAF
  • MEMBER
  • 4 POSTS
  • 2003 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 71,950 MILES
Hello, first, just to specify, my truck is a 6.0L extended cab long bed truck.

Now, this is what I changed before the problem started. Recently, I found that some wires in my truck were being smashed and, in turn, shorted against the firewall by the interior e-brake pedal arm. So, I disconnected the battery to solder the 3 wires back together. I clipped the corroded/broken parts off before soldering, then I heatshrinked them and wrapped them with foam and duct tape. The three wires are purple, orange, and yellow. The yellow one is either 18 or 22 gauge, while the others are around 14 gauge. They go into a connector on the fuse panel under the dashboard which is labeled as "12-way body" in the manual. I reconnected the battery and started the truck, no probs.

Now to the problem. The next day, driving to work, the truck died at my first stop (no check lights). After that I started paying attention to the tach and voltmeter. Only at stops, the tach drops from 750 rpm to about 600, then bounces between 250 and 600. No weird noises, besides the fact that the engine sounds like its dieing. Watching the voltmeter, it drops from just above 14 (normal) to about 10-12v. So far, since this started, my truck has only died 2 times. So, most of the time the engine recovers and goes back to normal idle. I figured out this morning that the lulling/shuddering/low rpms/trying to die is most easily replicated by shifting gears. Every move of the shifter causes temporary lulling/shuddering/low rpms then it goes back to normal idle. The symptoms last for 5-10 seconds after the tranny is done shifting. Still not one check light. Also, this is ONLY during braking/stop.

Right now, I’m just trying to find out the problem maker. I’d like to narrow it down as far as possible by spending the least amount of money because it’s going to be for sale real soon and I have no idea where to start. Please help! Thanks!

Drew
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Tuesday, December 31st, 2019 AT 12:40 PM (Merged)

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