ok guys i have a 5.3 swap in an old jimmy, i have a whipple on it right now, basicly what happend is that i got on it in front of my house then when i went to turn around the brakes felt horrible and it had horible blower idle when i therw it in neutal the rpms shot up as if i was wot, so i shut it down and rolled it back in the shop.....blower has been on the jimmy now for about 100 miles no problems, have any ideas??


checked throttle
checked brake booster hose
looked for any thing out of the regular, nothing

oh it is only on the 6# pulley right now

 

This has never happend to anyone before????

 

sounds like a vacuum leak somewhere maybe a bad booster.