Hey fellas, I got a bit of a problem here that I need a little help on. When my truck is cold, usually the first drive of the morning, the throttle acts very funny. It is unresponsive and bounces around. If I step on it hard enough the problem goes away. It only does this for the first few miles. It will usually start doing it around freezing or below.
Here is what I did today. When it was cold I left it in park and slowly pushed the pedal down. Then engine would start to climb, then stop climbing while I kept pushing, then it would jump to where it should be. It would climb normal, then maybe fall a little bit, climb up, pause again, maybe drop a little, then finally at about 2000 it seems to run fine.
But the odd thing is that if I leave it on the block heater or drive a few miles it works fine.
I hate to admit it, but I'm thinking the apps is going. It has a new vp44, lift pump, and injectors. What ideas do you have.
99 24 valve cummins