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Unread 07-04-2012, 04:27 PM   #1
Xtremegameroom
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Misfire on Cylinder 1, low compression on cyl 1

Hi guys, I have been getting misfire on Cyl 1 randomly for the last 3 months or so. When I first got the misfire, I replaced all the plugs, and the ignition rail. It seemed to be fine for a couple weeks then it started up again. Then I replaced the injector on Cyl 1 and it ran good for a couple more weeks. then it started up again. So today I ran a compression test and heres what I got:

143 PSI Cyl 6
152 PSI Cyl 5
151 PSI Cyl 4
151 PSI Cyl 3
152 PSI Cyl 2
82-89 PSI Cyl 1

I tested cyl 1 three times. the first time it read 89, the 2nd time it read 130, the 3rd time it read 82 PSI.
What should I look for? Cracked head possibly? Blown head gasket?

Thanks

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Unread 07-04-2012, 07:49 PM   #2
cruiser54
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With the intake boot removed, use a 8 ounce cup of water and dribble it slowly into the throttle body while using the linkage to keep it from stalling. Repeat with a second or third cup. The water will cause any carbon under a valve to break off and allow the valve to seat again.
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Unread 07-10-2012, 10:22 PM   #3
ruggles
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Quote:
Originally Posted by cruiser54 View Post
With the intake boot removed, use a 8 ounce cup of water and dribble it slowly into the throttle body while using the linkage to keep it from stalling. Repeat with a second or third cup. The water will cause any carbon under a valve to break off and allow the valve to seat again.
Has anyone else tried this? I have a dead cylinder on my 2.5L maybe I'll give that a shot
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Unread 07-10-2012, 10:44 PM   #4
cruiser54
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This has been done for years. Go for it.
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Unread 09-07-2012, 04:17 PM   #5
Mboelts
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I have got to try this before I start tearing my engine apart...
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Unread 09-07-2012, 05:28 PM   #6
cruiser54
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Originally Posted by Mboelts View Post
I have got to try this before I start tearing my engine apart...
Can't hurt. Just be prudent as you're pouring it in.
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Unread 09-07-2012, 08:00 PM   #7
Mboelts
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Think ill just use a dollar store mister bottle
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-"I feel sorry for people who don't drink. When they wake up in the morning, that's as good as they're going to feel all day." - Frank Sinatra

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

KCCO!
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Unread 09-07-2012, 08:02 PM   #8
cruiser54
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Originally Posted by Mboelts View Post
Think ill just use a dollar store mister bottle
Why not?
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