Spark plug gap

Tiny
JOEY341974
  • MEMBER
  • 2001 BUICK LESABRE
Engine Mechanical problem 6 cyl Front Wheel Drive Automatic 107000 miles

I took my plugs out of my car and they were gaped at.75 and the Oreillys computer said.60 gap these plugs I bought were pre-gaped at.75 already. I looked in my car manual and couldn't find any spark plug gap settings. So is.75 the right setting?
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Sunday, August 30th, 2009 AT 11:05 PM

7 Replies

Tiny
KEN
  • ADMIN
Hello,

Here is a guide on how to replace your spark plugs along with a video on how to check the gap on your spark plugs before you install them.

https://www.2carpros.com/articles/how-to-change-spark-plugs

and

https://youtu.be/c9_NVXiwvYg

Here are the specs for the plugs,

Spark Plug AC Type 41-921

Gap 1.52 mm (0.060 in)

15 Nm (11 lb-ft)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Friday, September 29th, 2017 AT 4:57 PM
Tiny
OGALLARDO
  • MEMBER
  • 2001 BUICK LESABRE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 174,342 MILES
Engine Performance problem
2001 Buick Lesabre 6 cyl Two Wheel Drive Automatic 174342 miles

my buick lesabre just had a tune up and the engine has a bad case of the shakes, gets bad gas milage and has loss of power. I'm tring to verify the gap on the spark plugs but not sure of the gap and if there is anything I can check for I would like to know. Thanks
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Friday, September 29th, 2017 AT 4:58 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
I could give you a gap but they very from the vehicle. What I can get is recommended but your vehicle has one on the vehicle emission label under the hood. Look for it there. That is the right one guaranteed.

Id make sure all the plug wires are on properly and routed properly and not causing the plugs to crossfire or not fire at all.
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Friday, September 29th, 2017 AT 4:58 PM (Merged)
Tiny
CYBERJAZZ
  • MEMBER
  • 1990 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 20,000 MILES
Engine Performance problem
1990 Buick Lesabre 6 cyl Front Wheel Drive Automatic 20000 miles

What is the Correct Gap for a spark plug on a 1990 useing split fire plugs
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Friday, September 29th, 2017 AT 4:58 PM (Merged)
Tiny
SERVICE WRITER
  • EXPERT
Splitfires are a sexy glamorous spark plug that is junk.
I don't think they are gap adjustable either.

The gap is.060

Pick up a set of delco or autolite (605) plugs
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Friday, September 29th, 2017 AT 4:58 PM (Merged)
Tiny
GREGHA
  • MEMBER
  • 1982 BUICK LESABRE
  • 2WD
  • AUTOMATIC
  • 52 MILES
I have a carbon build up on spark plugs what causes this
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Friday, September 29th, 2017 AT 5:00 PM (Merged)
Tiny
HMAC300
  • EXPERT
Usually oilin the cylinder and sometimes gas not firing correctly. It really dependson how long the plugs have been in the engine and what kind of driving and care the vehicle has had. It also depends on how much carbon is on the spark plugs.
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Friday, September 29th, 2017 AT 5:00 PM (Merged)

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