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Engine stalls out?

Tiny
DWAYNE75
  • MEMBER
  • 1989 CHEVROLET SILVERADO
  • 22,200 MILES
Engine stalls out in drive at stop sign but shuts off in reverse. Changed plugs and ignition plug actuator. What to do next
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Friday, March 22nd, 2013 AT 8:30 AM

41 Replies

Tiny
DWAYNE75
  • MEMBER
  • 4 POSTS
Also the turning signals work when they want to. Looks like left signal is wired straight to the turning signal shifter. News to know gap on plugs.I've heard 35 and 60. Set at 35 now. This is a 1500 4x4 5.7 liter 350 small block engine
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Friday, March 22nd, 2013 AT 9:36 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Shut off and stalls out are the same i would look for vacuum leak at base of the throttle body and go over this guide

https://www.2carpros.com/articles/engine-stalls

Please run down this guide and report back. Roy
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Friday, March 22nd, 2013 AT 10:56 AM
Tiny
DWAYNE75
  • MEMBER
  • 4 POSTS
Understand. More like hesitates in drive at light. Have to give it a little gas while pushing brake pedal.I've looked for leaks there and replaced a few vac lines. But ill double keep check. But it is worse in reverse. That's when it shuts off
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Friday, March 22nd, 2013 AT 12:54 PM
Tiny
DWAYNE75
  • MEMBER
  • 4 POSTS
What's the correct sparkplug gap
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Saturday, March 23rd, 2013 AT 3:31 PM
Tiny
MARK TOPE
  • MEMBER
  • 3 POSTS
  • 1989 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 11,300 MILES
Won't start without starting fluid and the engine stalls when I take my foot completly off the pedal. New fuel pump, works fine, no problem getting fuel to the throttle body but when I turn the engine over to start theres no mist from the injectors. When I do get going I can't take my foot off the pedal ever.
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Sounds like the pressure regulator. There are two types of injectors on Chevy, the 220 and the 700 the top is 220.


https://www.2carpros.com/forum/automotive_pictures/62217_silve_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_silvera_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_silverb700_1.jpg

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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
MARK TOPE
  • MEMBER
  • 3 POSTS
I only recieved part of the first sentence of your reply and the diagrams.
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
MARK TOPE
  • MEMBER
  • 3 POSTS
Please disregard I see now, sorry
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
KOLT_LODGE
  • MEMBER
  • 1 POST
  • 1989 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 298,000 MILES
My truck will idle and then start to die and it keeps doing that till it just does die what could be the problem
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean out the idle air control valve and test the throttle position sensor.
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
DRAVES67
  • MEMBER
  • 2 POSTS
  • 1989 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 163,000 MILES
This truck has a 350 throttle body fuel injection system. The problem is that it will start without even touching the gas but, it only runs about 5 seconds and then shuts down. We have replaced the idle air oxgen sensor, fuel presure regulator and all the seals in the throttle body. It has a new starter, battery wires, alternator, ignition module, cap and rotor, plugs and wires. The fuel pump is working I just don't know what to do next !
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure, the fuel pump might be coming on but is it producing the correct fuel pressure. Also have these things checked out-coolant temperature and throttle position sensors, idle air control valve/air bypass passage could be clogged up.
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
JUNKYCHEVY
  • MEMBER
  • 2 POSTS
  • 1989 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 400 MILES
I just built a 350 for my truck
Crane cam 280duration 480 lift
Vortec heads and tbi intake conversion
Headers
New plugs and wires
It idles okay until it "starts" to warm up I'm guessing the thermostat is bad but anyways
It starts to idle weird like it wants to die
It stutters and spits as I'm accelerating
Egr has been blocked off so that ain't an issue.
No matter what I set timing to it does not change the stutter or miss. Am I missing something I don't know what to do
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You may not be getting enough fuel or not have enough back pressure. Tbi unit can only give so much fuel Or the ecm may need to be remapped for the cam and different heads although vortec heads aren't any larger than what you have or had. But they put fuel into the cylinder differently also check for a vacuum leak as well.
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
JUNKYCHEVY
  • MEMBER
  • 2 POSTS
I found out that the plugs were fouled but I gotta ask could a flywheel make a knocking noise that goes away under acceleration?
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it's an automatic then probably your torque converter bolts have loosened that is normally what it is. They loosen up and hit the back of the block so check it then if they are take them out and put blue Loctite on them then retighten about 40-50 ft lbs. Should be ok then
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
DAVID5454
  • MEMBER
  • 1 POST
  • 1989 CHEVROLET SILVERADO
  • 5.7L
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Truck will crank fine then when you put it in gear it will just shut off. I have replaced throttle body injectors, throttle position sensor, idle air controller, new plugs, cap, rotor, fuel pump assembly, fuel filter, EGR blocked off, ignition temperature sensor. This has helped some but still cutting off.
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,840 POSTS
Can you please make a video of the engine having a problem so I can see what is going on? You can upload it here in your response. I sounds like you have a torque converter fallen apart locking up the engine when put in drive or reverse. It could be you have a vacuum leak as well. Here is a guide to help us go over a few things:

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

Please run down this guide and report back.

Cheers, Ken

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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
CHEVYMETRO19
  • MEMBER
  • 5 POSTS
  • 1989 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 18,500 MILES
My truck will start and idle fine when in park you can even reav it and it will run fine but as soon as you put the truck in gear the truck will stumble and stall
iv replaced the o2 sensor the fuel filter and I just resentle put new headers on it why does the truck stumble and stall when in gear
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the TPS, MAF, and MAP sensor to include the EGR valve
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Thursday, September 3rd, 2020 AT 1:03 PM (Merged)

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