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How to correctly compression test with electronic throttle?
#8
.RJ Wrote:This is true if you're just trying to make a general assessment of a street car as "not busted".

Yeah, that was the goal this time. So the consensus then is that the compression test shouldn't be affected too greatly by not knowing the throttle position. At least for a quick, "non-busted" test, not "testing my race engine" test.

Maybe next time I get around to it (likely never, I will forget), I'll try to verify by finding the difference between open and closed throttle.

FWIW, the bimmer was 190-210 on all 6. Which was a relief, because I did it at the dealer and had trouble getting repeatable #'s out of cyls 1 & 3, sometimes they were scary low. Like, 60. Confusedhock: Maybe the fuel system cleaner actually got rid of some carbon deposits, maybe just a long drive helped, and I definitely didn't warm it up fully, AND didn't disable the fuel system. I chalked it up to me doing something wrong and went with my gut. Whatever it was, it's ok now. Yay! :dunno:
The only thing that stops a bad guy with a van is a good guy with a van
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