I just put in a 4000 k rev kit and 60 lb valve springs, at 3 grand my truck pops and defuels!!! iv tryed adjusting valve lash and adjusting the gov springs and a lift pump nothing has seemed to work... im told that its rack float....any sugestions and ideas?

 

Fill out your signatue so we know what year & options/mods you have so we can more intelligently help you.

Tony

 

Sounds like you need more timing.