My daughters 01 Trailblazer 250 Won't start. It road fine all day, loaded it on trailer shut it off and hasn't started since. It's getting fuel, spark and the compression is at 110 psi, rebuilt the carburator, and checked all vaccuum lines for clogs and leaks and still nothing. This year and model doesn't have a reed valve, but I did notice if you put your hand over the carb on air breather side it's blowing pressure towards breather. Is this the problem and whats causing this? Thanks

 

Welcome to the forum! Try first holding throttle wide open and see if it cranks( crank could be flooded,plus there is a 10 mm crank drain plug at the bottom by the starter) 110 pounds compression is getting down close to the minimum,but you might want to check/replace the crank seal behind the drive clutch(after you've tried the above) as it could be a source of the problem also if distorted and leaking.Plus shouldn't be blowing back through the carb,should have suction! Also check the carb intake boot for any tears or leaks. Keep us updated OPT