i have a 93 13btt touring bone stock ...i just put a koyo raceing rad. in with new hoses and while everthing was out my way i replaced the precat o2 sensor and brand new sparkplugs in. it sat there for about 2 weeks without running . so i got everthing back to gather it cranked right up drove around for awhile to make sure there were no leaks came back and shut her down..then i came back about 30mins later to go somewhere nothing it would turn over strong and act like it was right on the verge of cranking but wouldnt so i kept trying and trying and finally after mashing the gas pedal alittle it cranked back up but the weird thing is it doesnt do that evertime. its been doing it about ever other time i try to crank it and it only does it when the engine is warm. if u guys have any ideas it would help me out alot. thanks

 

Sounds like low compression, do a comp test to rule that out. If compression comes back around 95psi or higher when the engine is warm you may have a slow leak in one of the injectors.

 

My guess is the engine is having a hard time getting fuel or like DJ said "compression test"... AWESOME title thread

 

ok thanks guys im going to the test as soon as i get time and ill let u guys know