Post plug change issues

Tiny
GARRYSCH
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 179,000 MILES
I finally decided to change the speak plugs in my 2001 5.3 Silverado (179k miles)

I am now getting a P0332 code in checking why my service engine soon light comes on. I am somewhat skeptical about coincidence, so, I feel I may have done something wrong. I did get OEM plugs, and I believe the gaps are properly set at.060. I say this because the pointed electrode started gouging my tool.

Any thoughts?
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Wednesday, February 23rd, 2011 AT 8:49 PM

14 Replies

Tiny
DOCFIXIT
  • EXPERT
Code is for rear knock sensor under intake. Any spark knock after plugs installed? Anything done with MAF?Iridium or Platinum plugs installed?
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Wednesday, February 23rd, 2011 AT 8:57 PM
Tiny
GARRYSCH
  • MEMBER
No Audible knocking sounds. Nothing done with MAF. Books said it took the AC/Delco 41-110 iridium plug. The ONLY thing I have done is change the plugs. The plugs wires were a bear trying to get off without the GM tool, but I made sure they went back on and that I heard a click each time.
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Wednesday, February 23rd, 2011 AT 9:07 PM
Tiny
DOCFIXIT
  • EXPERT
Plugs have been superseded A/C Delco 41-985 GM 12571164
Gap changed to.040
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Wednesday, February 23rd, 2011 AT 9:13 PM
Tiny
GARRYSCH
  • MEMBER
FYI- I just noticed that my profile reads [ 6 cyl ], and it is an 8 cyl. No sixes in the 5.3 liter variety.
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Wednesday, February 23rd, 2011 AT 9:15 PM
Tiny
GARRYSCH
  • MEMBER
I believe that plug is 2004 and later per my Haynes repair manual
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Wednesday, February 23rd, 2011 AT 9:19 PM
Tiny
GARRYSCH
  • MEMBER
'01 and '02 models required the NGK PZTR-5A15 plug
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Wednesday, February 23rd, 2011 AT 9:21 PM
Tiny
DOCFIXIT
  • EXPERT
That was superseded to plug in post per GM TSB
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Wednesday, February 23rd, 2011 AT 9:42 PM
Tiny
GARRYSCH
  • MEMBER
Well then, do I change the plugs, or try to re-gap these?
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Wednesday, February 23rd, 2011 AT 9:44 PM
Tiny
GARRYSCH
  • MEMBER
And, was there a chance I may have damaged any of the plug wires?
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Wednesday, February 23rd, 2011 AT 9:46 PM
Tiny
DOCFIXIT
  • EXPERT
Your truck GM says use plug I posted gaped at.040
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Wednesday, February 23rd, 2011 AT 9:48 PM
Tiny
GARRYSCH
  • MEMBER
Well, AC-Delco now says 41-985 are now to be 41-110, leave the gap at.040. I have done this. After about 30 minutes of driving, check engine comes on, the same p0332.

Have I possibly damaged the plug wires in the change out process, or, do I flip off AC-Delco and get the 41-985?
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Monday, February 28th, 2011 AT 4:11 PM
Tiny
GARRYSCH
  • MEMBER
I had truly hoped to get more from you. I went to the Chevy dealer where I bought my truck 10 years ago. They told me that 41-110 is the proper plug for my truck, gapped @.040.
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Friday, March 4th, 2011 AT 2:27 PM
Tiny
GARRYSCH
  • MEMBER
You know something? It is amazing what happened when I pulled the connector off of the rear knock sensor, and then put it back on. Now I know I cannot hit you for the extra set of plugs I bought, but, you do not deserve the monies paid.
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Friday, March 4th, 2011 AT 9:27 PM
Tiny
DOCFIXIT
  • EXPERT
Well I don't get the money it goes to 2carpros I get a VERY small %.
As for knock sensor you never got off plug thing for me to tell you about the common failure in wiring and water intrusion. Am glad it is resolved keep in mind very difficult to diagnose via a computer.
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Saturday, March 5th, 2011 AT 7:42 PM

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