4th cylinder misfire

R

Ryan441

Member

Nov 26, 2007

173

0

16

wintersprings, fl

Dec 23, 2007

#1

• Dec 23, 2007

• #1

my check engine light keeps coming on and the computer says the 4th cylinder misfire. i turned the light off and it stays off for about a week or so and comes back on. i checked the compresion and its at about 90lbs. someone told me that its a low compresion but it shouldnt set the light off would it also have todo w/ something electrical?

 

DBMSTNG

I fantasize about it being BIG!

Founding Member

Apr 23, 2002

2,120

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56

not quite here

Dec 23, 2007

#2

• Dec 23, 2007

• #2

could be a bad plug or coil pack.

 

Spro

New Member

Nov 3, 2007

73

0

0

IL

Dec 23, 2007

#3

• Dec 23, 2007

• #3

Change the coil pack with another one. Reset the computer and see if you throw a code on the other cylinder. If so, bad coil pack.

 

Bad92GT

The 5 Minute Plan Man

Jun 10, 2004

492

0

0

SC

Dec 23, 2007

#4

• Dec 23, 2007

• #4

pull the wire/COP and clean out the goop down in the hole.. typically water/junk will get down there and short out the spark. Not sure if this is the case, i'd just think i'd take the cheap easy ways of solutions first before coil packs/cop's

 

PUNISHER RACING

Active Member

Aug 27, 2007

1,124

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36

FORD CITY, PA.

Dec 23, 2007

#5

• Dec 23, 2007

• #5

coil pack

 

R

Ryan441

Member

Nov 26, 2007

173

0

16

wintersprings, fl

Dec 24, 2007

#6

• Dec 24, 2007

• #6

Spro said:

Change the coil pack with another one. Reset the computer and see if you throw a code on the other cylinder. If so, bad coil pack.

Click to expand...

do you mean switch the left one from the right one?

 

Spro

New Member

Nov 3, 2007

73

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IL

Dec 24, 2007

#7

• Dec 24, 2007

• #7

Ryan441 said:

do you mean switch the left one from the right one?

Click to expand...

Switch it with any of the other ones.

 

deftsound

Please ask me how much my supercharger cost

Apr 6, 2004

945

1

39

Texas City TX

Dec 24, 2007

#8

• Dec 24, 2007

• #8

+1 coil pack

 

R

Ryan441

Member

Nov 26, 2007

173

0

16

wintersprings, fl

Dec 24, 2007

#9

• Dec 24, 2007

• #9

i just checked my compresion and its at 90psi. what might be wrong and how bad is that c/r

 

R

Ryan441

Member

Nov 26, 2007

173

0

16

wintersprings, fl

Dec 24, 2007

#10

• Dec 24, 2007

• #10

i just changed my number four cylinder plug and i can still hear/feel the miss