so i just had my motor rebuild by my mechanic who is pretty reputable. when i got it back it ran well but the next day it was popping upon acceleration and i could feel the popping liek on my gas pedel maybe even under the seat. he just rebult the exuast eystem while he was in there because it was cracked. my question iis what could be causing this im going back to talk to them tomorrow but i just wanted so good feed back to make sure i new what was going on

 

"Popping" is a pretty general term. Possibly an exhaust leak. Or is the engine back firing?

 

i dont really know i thought since i felt it under the seat it might be exhaust

 

Your mechanic should be able to solve it in no time....

 

i hope so cause now it wont even get up past 30mph and its shaking alot its really pissing my off i spent 1800 on my new rebuild lol

 

Also now it wont even go im taking it in on monday but im super stressed cause i spent 1800 on the rebuild and i dont know whats wrong. it starts up just fine but as soon as i hit the gas it slowly builds rpms and when its in 1st when i push the gas down it dont even go it shakes really bad at idol and when i tried to go. air coming out of the tail pipe is sputtered and i plugged the tail pipe and it didnt stall out can a vacuum leak be causing all these problems? also i went under the hood and when i pushed the throttle in i could hear it sucking air or trying to suck air by the air intake box never heard this before so idk if thats normal but i dont think it is really confused any thoughts would be awesome

 

Yes, a vacuum leak could be causing your problems.

 

Sorry to dig up an old thread, but what did the problem turn out to be? My rebuilt engine is doing the same thing.