the exhaust smells like fuel, and ill check for leaks but ive never smelt anything while driving in the cab.. thanks for ur help, looks like im bout to start a tare down here soon..
no need to jump into a tear down just yet.
1. shoot your exhaust header with a temp gun, and mark your temps, (it is best to remove the serpentine belt for this to get an accurate reading from the first few cylinders)
*Since it is at idle and your engine cold, there is no worry about overheating the engine or such even when fairly warm, provided your idling and your not runnign to long if your warm.
2. pull valve cover run motor (w/o) serpentine belt at idle and use a screw driver to see if you can pinpoint where in the motor the sound is coming from.
*you don't want to fan runnign so you are not blowing crap all over your motor inside with the valve cover off.
3. do a leak down test/compression test on your motor.
4. pull injectors and have them tested.
5. pull oil pan and check for play in the connecting rods/crankshaft, look for metal deposits in the pan.
I would then check the VP-44 before i pull the head, these trucks are mechanical, so if your VP-44 is screwed up it will cause a timing issue, but since you say you smell alot of fuel out of your exhaust, i would suspect you have a bad injector that is just leaking like crazy.