car starts but something isnt right
03-07-2010, 02:02 PM
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car starts but something isnt right ok i posted last night that my 67 camaro with a 5.3 and ls1 intake starts but idles up over 2000 rpm immediatly then after a minute or so starts to make its way back down to around 700 but something isnt right. im only pulling about 6 inchs of vacuum according to my gauge i hooked up and when i hit the gas it almost dies. im really really confused right now. i sprayed carb cleaner everywhere and didnt find much. the only placce i see it idle up when i drench it is around the throttle body. but its not but maybe a couple hundred rpm and i gotta seriouisly soak it down to get it to idle up any so im not sure if thats even it. so where all is the most common vacuum leaks. also what scanner tool do i need so i can check all of my sensors and make sure like the maf and everything is working right. who figures this one out ill buy a case of beer lol. if you need more info just ask any help is greatly appreciated
oh yeah also im getting a scanner code that says my map sensor performance. but i figure its cause im not getting enough vacuum
oh yeah also im getting a scanner code that says my map sensor performance. but i figure its cause im not getting enough vacuum
03-07-2010, 07:40 PM
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If you're only seeing 6" of vacuum, you've either got a massive vacuum leak or didn't have the gauge hooked in the right place.
At idle you should be seeing 17" or better, depending on your cam.
At idle you should be seeing 17" or better, depending on your cam.