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Cranks but no start

Tiny
FISHER8967
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • 4.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 204,500 MILES
New plugs, wire, distributor and cap, new ECM and is matched to VIN. Was running fine stumbled now won’t start. There’s a plug connection that is loose so zip tied it and ran fine no codes, same thing after six months. So I’m guessing g plug connector finally went bad, but can’t find the name of said plug. It’s mounted under air intake and looks to go down to distributor. Anyone know the name of said plug? If need be I’ll try and upload pictures of said plug.
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Wednesday, December 19th, 2018 AT 7:43 AM

12 Replies

Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
Yeah, a photo might work.
As far as the crank no start, see if the engine will start and run for a few seconds on starting fluid. If not, check for spark.
If it does start, check for fuel pump operation, check the fuel pump fuse and try a new fuel pump relay.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
FISHER8967
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All that is good. I know what it is I just can’t think of the parts name to get it from parts store. I’ll get the picture.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
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Perhaps if it has wires, give me the color of the wires and even where it connects to and I should be able to see something on a wiring diagram perhaps.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
FISHER8967
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Okay, I’m at work took Mrs car today. I’ll get it when I get home.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
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Okay.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
FISHER8967
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This is the plug I’m talking about.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
FISHER8967
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  • 7 POSTS
Also, what sensor is it plugged into and where do the wires go to they are wrapped into the plastic protectors with others?
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
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I believe that is this.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
FISHER8967
  • MEMBER
  • 7 POSTS
Okay, got her started by putting zip tie on plug but might not be that. So if I throttle up to 3,000 rpm's and hold she will actually stumble to about 2,500 but back up. Then after a minute will stumble hard and shut off. Right now at idle it will stumble and almost cut off. Any ideas?
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
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Get the engine trouble codes retrieved and go from there.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
FISHER8967
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Not throwing any. And this model does not have an in line fuel filter.
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Wednesday, September 2nd, 2020 AT 12:55 PM
Tiny
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If half of that is a mass air flow sensor, that cannot be simply zip tied, you will have to secure it.
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Wednesday, September 2nd, 2020 AT 12:55 PM

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