1994 300 ex .. sometimes i can get it to run as long as i keep the throttle opened up maybe a min or two then it almost sounds like it backfires and dies.

i did just rebuild the whole motor , but i also went for a pretty good ride with it after i got it done .. so it did run after the rebuild

can the timing be off? if it was 180 off it wouldnt start ?

it would be wierd if the carb was messed up now .. because its always been cold hearted but i could get it to run before just had to get it warmed up a little

i did replace the cam in the rebuild because we lost the other one ( long story ) just a stock cam

what woudl you check if you were me ? im out of ideas.