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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-17-2009, 11:34 PM   #1
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Default Check Engine

Cylinder 4 Misfire... Ugh.

Is there anyway to fix this myself, or without having to pay 280$?
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Old 04-18-2009, 12:19 AM   #2
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Pull the plug on #4, what does it look like?
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Old 04-18-2009, 12:24 AM   #3
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I dont know, I wouldnt even know where to start with this lol. All Ive done so far to keep it from getting worse is used Fuel Cleaner.

All its doing is using up more fuel, and slowing my accelaration a bit. I just dont want it to get worse lol.
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Old 04-18-2009, 09:03 AM   #4
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Have you ever changed a spark plug?

Here is a visual on where the #4 plug is as you are standing in front of your motor looking down:


To get to it you will have to remove the strut tower bar as shown in this photo:
**Note: this bar is red. It is the long bar going from one strut support to the other. yours will be black**



For the strut tower bar all you need is a 1/2 inch socket and the 3/8 ratchet. Remove the 4 bolts; 2 on each side. Pull bar up and put a side somewhere. Please take note on the top bar on either end the embossed 'L' and 'R' on each side of the bar. There is a left and right so put it back the way you took it off.

Once removed you can get to the rear plugs.

Tools you will need are spark plug socket and 3/8 ratchet, and about a 3" extension.


-Todd
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Old 04-18-2009, 09:13 AM   #5
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Strut tower is actually a 13mm, but a 1/2 will work. #4 is right by the O2 sensor wire. Make sure that plug wire is not touching the O2 sensor wire.
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Old 04-18-2009, 09:20 AM   #6
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Edit: it is a 13mm...just checked it.
Thanks Dan
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Old 04-18-2009, 09:23 AM   #7
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Remember, 10mm, 13mm, and 15mm covers nearly every nut and bolt on these cars.
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