Crying tears of joy after leakdown/compression results
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This is a discussion on Crying tears of joy after leakdown/compression results within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hi all, about a year ago I started getting random misfires on cylinder 4 on my 2002 WRX. I worked ...

  1. #1
    Registered User subypete's Avatar
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    Jan 2008
    Forsyth, IL

    Crying tears of joy after leakdown/compression results

    Hi all, about a year ago I started getting random misfires on cylinder 4 on my 2002 WRX. I worked myself into a panic after reading various horror stories about burnt valves, cracked rings, etc. Fortunately for me my wife wasn't working at the time, so I borrowed her car until I could diagnose the problem. Well, before I could figure it out (because honestly, I couldn't make time), I got sent on a 6 month assignment for work. I really missed driving the WRX (her name is Betty) and the commutes to and from work in a CRV only made things worse. Well, I got back last month and finally found time to do both leakdown and compression tests. Here's the numbers:

    Cylinder 1: Compression - 156 PSI...... Leakdown - 6.7%
    Cylinder 2: Compression - 153 PSI...... Leakdown - 5.5%
    Cylinder 3: Compression - 154 PSI...... Leakdown - 4.4%
    Cylinder 4: Compression - 158 PSI...... Leakdown - 6.7%

    Now I don't now about everyone else, but seeing these numbers gives me chills Pretty good for an engine with 170,xxx miles!!! And not bad for a Monday!

    I've been following this list, so clearly I've got a few more things to try, but it's good to know it's not the internals:

    I hope if you find this after searching "cylinder 4 misfire" that it gives you hope. It's not always rings or valves!
    2013 Nissan Leaf SL - Extra Leafy
    2002 OBP WRX - Stage II - "Black Betty" - SOLD
    1987 Subaru GL Wagon - Stock - "Mr. Ratburn" - SOLD

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  3. #2
    Captain James of the SS Impreza has gone down with the ship Drews's Avatar
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    Aug 2008
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    Cool story.
    Hawk-Eye Alliance #Eleventy,000,000,000|N.E.R.D. Member 20,000
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  4. #3
    Registered User wreckingball man's Avatar
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    Jul 2012
    Rocky Top

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