Plug Question

Kevin R.

New Member

Jun 3, 2004

473

0

0

Ohio

May 7, 2005

#1

• May 7, 2005

• #1

If i had one spark plug that was bad, would it make a noticeable difference or just slight?

I was wondering because my brother got in my car and mentioned a slight shaking and lope, almost as if misfiring on one cylinder. I apparently have become accustomed to it and do not notice. This time i paid attention and it does have a slight shake and "lope" to it but very small.

Could a bad plug cause this?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

May 7, 2005

#2

• May 7, 2005

• #2

a bad plug, wire, etc can cause that (almost makes it feel like you have a lopey cam in it). you can do a couple things. a cylinder balance test might shed some light. or pull plug wires one at a time and note if nothing changes when you pull a specific wire. i have also sprayed water on headers - a non-firing cylinder wont steam the water.

be very careful doing any of this stuff. you can get shocked and burned.

good luck.

 

302fordracer

New Member

Mar 27, 2004

738

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0

Vancouver, WA

May 7, 2005

#3

• May 7, 2005

• #3

well I would say a plug that isn't firing at all would be VERY noticeable...I had that problem in a previous car and it stumbled all over the place and refused to accelerate...but if it is just a weak spark...sure I could see it causing that..

 

BlackVert

15 Year Member

Oct 3, 2003

5,589

9

98

Bethesda, MD

May 7, 2005

#4

• May 7, 2005

• #4

i had a bad spark plug wire and it was REALLY noticeable. terrible stumbling and misfiring between 2000 and 3500 rpms.

 

Kevin R.

New Member

Jun 3, 2004

473

0

0

Ohio

May 8, 2005

#5

• May 8, 2005

• #5

Thanks a lot for the great info. Although this may be a slight problem, I have come to the conclusion my piston rings are going downhill. I didnt think anything of it but when I changed my throttle body out it had quite a bit of oil in it and I am losing a lot in between oil changes. Ohhh man. Here we go.