D722 high compression

[miller09]

Any ideas why my d722 would have high compression? It has become hard to start blowing black smoke. Once it fires up it seems to run just fine. Did a compression test and it has 430lbs on 2 cylinders and 560lbs on 1 cylinder. Could it be a bad injector? Thats my only guess. Thanks

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[North Idaho Wolfman]

Any ideas why my d722 would have high compression? It has become hard to start blowing black smoke. Once it fires up it seems to run just fine. Did a compression test and it has 430lbs on 2 cylinders and 560lbs on 1 cylinder. Could it be a bad injector? Thats my only guess. Thanks

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Yea unless it's flooding (because of a bad injector) or coolant (cracked head, blown head gasket, usually white smoke too) there is no logical reason for it to have that high of compression.

 

[beex]

430 is in the correct range for that engine, 560 is high, have no idea what could cause compression to be too high, never heard of that


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