well i have a basically stock 5.0 in my car except for the weiand xcelerator intake and i am running an edelbrock model # 1405 carb. my problem is i cannot seem to get it to idle correctly. usually i am pretty good at adjusting carbs but this one has me thrown off. my floats are adjusted correctly and i used a vacuum guage to find the lean-best idle mixture. when it is a idling in my driveway it will surge and when i am driving and ill have the clutch in at a stop sign it will go up to like 2k rpmsthen drop down and want to stall, i can tap the gas and it will go back up and sometimes come back down and start to surge around 1k rpms. i dont get it???

 

one thing is you have the wrong intake..you need a dual plane intake..does that carb have a slosh tube?

 

ya i know its not the proper intake but it was really cheap....40 bucks, but do u really think that is causing that kind of problems?

 

vaccume leak maybe?

 

nah no vacuum leaks, ive made sure of that countless times, anything else?

 

any other ideas?

 

bump

 

Sounds like a vacuum leak. You got a cam?

 

no cam and no vacuum leak...i keep coming back to a vacuum leak too but there is absolutley none. i did just realize today i have a minor exhaust leak where the header meets the h-pipe, i dont think that would cause my problem though. if it is i am fixing it tom. i would have done it today but i was at motoX races tonight

 

I dunno man. Usually a high idle is due toa lean mixture or vacuum leak