im running six pounds of boost on a stock 91 integra motor. it ran great till i went to start it this morning and it just cranks. it ran fine when i parked it the night before. it has spark. it has fuel. and the compression seams very low. between 60 to 65 psi in all cylinders. anyone have any ideas what the problem could be

 

well if you did the compression test correctly, theres a good chance your rings are shot.

 

do you think the rings are stot even though it run great the night before and never blew any smoke out the exhaust

 

sounds like its off timing...check the cam timing it probably jumped. You might have bent valves...it might be fine

 

thanks you were right it jumped a tooth i spent so much time trying to figure this out. thanks again