I have a v8 Dakota that I'm trying to straighten out under the hood. The starting and running procedure goes like this. When I start her up when the engine is stone cold, it runs great with plenty of tire burning power and mountains of torque. But after a minute or two of running and warming up, all the fun ends and it feels like it has about 30% less hp. I have a loud exhaust that comes out of the bed like a stack, and I can hear a noticeable difference in the exhaust note too. It starts off real loud and powerful, then dies down to a smoother weaker note. I have evidence of fuel pressure problems. But another issue is, when I'm climbing a hill at highway speed, the engine misfires in five cylinders when under load. It has a brand new ignition system, good fuel, and a K& N intake. Any leads on what may cause this?
Friday, November 30th, 2012 AT 3:54 AM