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Three day ago I change my sparks plugs, wires.

Tiny
MNO221
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 210,000 MILES
Three day ago I change my sparks plugs, wires and pvc, now my truck idle rough in the mornings, unless I keep my foot in it.
Monday, October 31st, 2011 AT 4:08 AM

11 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Recheck your installation, you may have crossed a wire.
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Monday, October 31st, 2011 AT 2:26 PM
Tiny
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Ok I didn't finish the question, its idle rough until it warm up then it smooth out and runs good all day, then the next morning same thing. This morning I didn't have to give it gas but it idle rough like it wanted to die out, after about 3/4 mins it smooth out and running good.
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Monday, October 31st, 2011 AT 4:03 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Then you probably have avacuum line left off someplace it soudns like the computer is richening up the mix when it's warm tomake it tidle better. Check your hoses/pcv linvacuum lines etc.
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Monday, October 31st, 2011 AT 4:32 PM
Tiny
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Thanks will check it now
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Monday, October 31st, 2011 AT 4:41 PM
Tiny
MNO221
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One more question I replace my plugs with AC Delco 41-110 gap.40 that what it call for now, they came pre gap when I check them they was off a little, should I have gap them to the correct gap, would that cause the problem?
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Monday, October 31st, 2011 AT 4:52 PM
Tiny
HMAC300
  • MECHANIC
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The manual I have says that it take R41-932 and gapped at.060if it goes away when warm it has to be a small vacuum leak as the computer will richen the mix up to take careof small vacuum leaks. But only after it reachs a certain temp
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Monday, October 31st, 2011 AT 6:43 PM
Tiny
MNO221
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Ok I have been gone for a while haven't had a change to reply. Checked all connection and all seem to be right and tight, now getting codes P0171 & P0174. Where can I go from here?
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Monday, December 5th, 2011 AT 11:31 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
That is a lean code condition, check yoru fuel pressure and recheck your vacuum lines and spray intake with choke cleaner for a vacuum leak again. It rpm changes you found the vacuum leak.
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Monday, December 5th, 2011 AT 11:48 PM
Tiny
MNO221
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  • 49 POSTS
Spray intake and there was a change in rpm so I need to change the intake gasket is there a DIY on this job.
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Tuesday, December 6th, 2011 AT 11:09 PM
Tiny
HMAC300
  • MECHANIC
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Removal

1. Disconnect negative battery cable. Release fuel pressure. See FUEL PRESSURE RELEASE. Drain cooling system. Remove sight shield (intake manifold cover) and sight shield mounting bracket. Remove air
cleaner duct. Disconnect accelerator cable,  cruise control cable,  and coolant hose from throttle body. Disconnect necessary electrical connectors,  and vacuum lines.
2. Remove EGR pipe. Remove fuel injector electrical connectors. Disconnect fuel pipes from fuel rail. Remove intake manifold bolts,  and remove intake manifold.

Installation

1. Use NEW "O" rings when reconnecting fuel lines. Apply light coating of engine oil to NEW "O" ring and install onto EGR pipe. Tighten EGR valve bolts in 2 steps to specification. See TORQUE
SPECIFICATIONS.
2. Install NEW gaskets and intake manifold. Apply Threadlock (12345382) or equivalent to intake manifold bolts. Tighten intake manifold bolts in sequence and to specification. See Fig. 1. See TORQUE
SPECIFICATIONS. To complete installation,  reverse removal procedure.
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Wednesday, December 7th, 2011 AT 12:26 AM
Tiny
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Ah OK, pics would have been nice :)
Thanks hmac300. I"ll get.
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Wednesday, December 7th, 2011 AT 12:43 AM

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