Jeep has problems starting
I have a 2004 jeep grand cherokee with a 4.7 V8 in it, bought it back in february. Two days ago i took out the IAC and cleaned it as well as the throttle body because it was running close to 2000rpms when you would start it up. While I was doing that i went ahead and changed my spark plugs (they were WAY overdue to be changed). Put it all back together, took it for a spin and all seemed fine, idling at about 800rpms. Now it wants to turn over a whole mess of times before it wants to start, I have to pump the gas multiple times before it takes off. Once it gets running and is at idle speed, if you just tap the gas you can hear it hesitate as if it is going to stall before it takes off. It also sounds as if one of the headers might have a hole or be cracked (dont think i noticed this sound before i clean the IAC and changed the plugs...but it could have been there) not sure if that has anything to do with it. It seems to be one thing after another with this Jeep.
I just went back out and listened to the *manifold leak*, and Im pretty sure that is NOT what it is. It makes that sound only at a low idle, between 600-900 rpms. When i rev the engine up to 1000-1200 rpms, this sound goes away. Deos this have anything to do with the starting problem?