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Compression test results
Topic Started: Aug 21 2014, 05:18 PM (1,623 Views)
M4tthewd
Matt

I think I'll pull the FI relay, and redo the test! Because it's definitely a beast for power. I'm really impressed actually! It's quicker then my truck. I must of done the test wrong, even though I double checked my work and did it twice. Because my engine doesn't sound feel or show any sign of lose of power or that it's almost dead lol.
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myredvert
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myredvert

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think I'll pull the FI relay, and redo the test!
here's a thought. How about...

"I think I'll read and follow the actual compression test in the Factory Service Manual which is available right here in the forum library (FSM Section 6, page 6, all years), and do the test correctly so my results will be as the engineers intended in order to be used for comparison to specs, and I won't have to keep doing it over to get meaningful readings ? :dunno

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myredvert
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myredvert

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when I got my 95 1.3 my comp was 115 or so on all. However when I lifters broke and messed up my cam shaft I test again and I was 180-170 on all.

I rebuild another 1.3 honed and new rings and it was 150 on all.

What I am trying to say is gauges are not always right....
...Especially when the results are unlikeable or indicate we may have been mistaken or performed a procedure poorly or incorrectly. ;)

Objectivity includes an understanding of the fact that a gauge could be wrong, but also nags us to confirm the accuracy of the gauge and verify the actual condition of our engine, no matter how unlikeable those results may be. Denial and Bias are those two little Mr. Badwrenches on our shoulders saying .....
"blame it on the gauge, bubba... everything is juuuuuuuuuuuuust fine." :thumb :evillol :evillol

Yes, gauges aren't always right, but they are wrong less than people are, and at least when they are wrong their errors are typically consistent enough to be measured and reliably corrected for.
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cwatkin


I have seen bad compression gages before. It sounds like you calibrated your's against others so this probably isn't the case. I usually pull the fuel injection connector from the throttle body and hold it WOT when testing just to be sure no fuel is getting released into the engine.

How do the other aspects of the engine seem? Does it burn any oil? Normally a newly rebuilt engine will burn some oil until the rings seat. If you are still adding 1 quart every 1000 miles after a couple thousand miles, you did something wrong.

That being said, my first G10 burned oil like a madman but ran surprisingly well and got good fuel mileage. I went through about 1 quart or more every 100 miles, leaving massive clouds of smoke behind me. I knew this engine wasn't going to be around long so I found a good replacement and have been happy with it ever since.

Conor
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