ive got 3 post here and only 1 response,i know there are alot of pros here,they have helped before.i got a 1986 lt 250 quadrunner and it keeps missing if you hold the throttle at a fast idle or more.it works better if you just ease it up faster more slowly.any ideas.

 

low compression, dirty carb, restricted fuel shutoff valve, main jet, intake leak, restricted air filter, bad gas

 

thanks for the reply,i put in a new head and base gasket

 

Did the problem start before or after you replaced the head and base gasket?
If it was after, then why did you replace them?

Just trying to get more info.

Could also be bad spark plug, or insufficient spark.

 

i replaced the head gasket because the base gasket was leaking oil.the 2 ront head bolts were loose.