I'm sure you guys have heard this before, but im new to the duramax club, and honestly i feel lost right now. ![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I bought my truck with an issue, and felt fairly sure it was fuel knock. the guy i bought it from said a gm tech took a look at it and said the issue was a piston wrist pin. sounds similar, i would say.... you can put your head above the engine and cant distinguish which side the noise is coming from. sounds like all over the place, honestly. i dont feel any blowing out of the oil fill, and there is a small amount of smoke out of the exhaust. it needs to turn over and sputter a few times to get started, and also seems to lose its prime after awhile.
i did a few logs with efi live, and the #2 injector had a balance rate of 11.5. the other cylinders were pretty much in tolerance other than #5, which was around 7. rail pressure was showing good, so i replaced #2 injector. truck runs exactly the same. did another log, and #2 is still 11.5 or more. i did the ice pick deal to no avail.
any suggestions? should i do a compression check on all cylinders? crank position sensor? faulty wiring?
I bought my truck with an issue, and felt fairly sure it was fuel knock. the guy i bought it from said a gm tech took a look at it and said the issue was a piston wrist pin. sounds similar, i would say.... you can put your head above the engine and cant distinguish which side the noise is coming from. sounds like all over the place, honestly. i dont feel any blowing out of the oil fill, and there is a small amount of smoke out of the exhaust. it needs to turn over and sputter a few times to get started, and also seems to lose its prime after awhile.
i did a few logs with efi live, and the #2 injector had a balance rate of 11.5. the other cylinders were pretty much in tolerance other than #5, which was around 7. rail pressure was showing good, so i replaced #2 injector. truck runs exactly the same. did another log, and #2 is still 11.5 or more. i did the ice pick deal to no avail.
any suggestions? should i do a compression check on all cylinders? crank position sensor? faulty wiring?