running rough

1005 Views 4 Replies 3 Participants Last post by  lilbully
Here is my confusion..... I put a 5.2l in my dodge ram that had a 5.9 in it but now if I have all the vacuum lines hooked up it dies out like the rpm gauge drops and when i disconnect any of the vacuum lines it runs better a little rough but doesn't die out. When I hit the gas it revs up without hesitating at all and drives fine only when I let it get back down to idle in 1st gear or in reverse when stopped it dies. It is getting better since I ran it for a bit and kept hitting the gas to keep it running but is still dieing when you just let it sit can someone explain to me what is going on....
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Just replaced the gasket for the intake and the plenum. No leaks at all already checked that out already. Replaced every gasket but the head gasket. So I am lost it only happens this bad when all the vacuum lines are hooked up properly
I just got 2 codes to pop up one is throttle/pedal position sensor circuit high input and the other is bank 1 system to lean. How do I fix this and could this be my issue?
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