Could it be an intake plenum leak without pulling oil in there?
Peter

 

Nope.

 

Well that IS frustrating.
What is the possibilities of a bad cam chain after 118K of well taken care of miles?
I have a new MAP sensor on the way and I will take another peak in the intake then I toss it on........
The engine is quiet, Is there something I can check looking for a work cam chain?
Peter

 

As to wear and tear I'd say slim to none. But there is always the possibility of a defective part having gone bad earlier than it was engineered to.

 

Guys, yet another newbie here.

I have a B1500 conversion with the 5.9 and the EXACT SAME ISSUE! Sorry but as the original poster to this thread will attest is that this is a very frustrating issue without the usual suspects being at fault.

My unit has had a complete tune up (plugs, wires, cap and rotor, ignition coil and both O2 sensors) from the dealer. The person I bought it from had the Crankcase sensor replaced at a 3 party shop so don't know what it was replaced with. I do not recall the original poster saying so but the computer does not throw any codes. I cannot say if the problem is getting worse but its not getting better.

Absolutely any assistance will be appreciated... (and rewarded with many thakyous!)

 

I could not believe it, No oil in plenum, Clean and dry, Yet we had the intake plenum gasket changed out all the same, We were too far in and needed the van for moving and dropped it off for the mechanic I have known since 1982 to do, Well he said aside from the old gasket being dry and brittle he didnt see anything bad in there,,,
So I worried as I drove away,, And now nearly 2K miles later not as much as a buck, Perfect! Great running van!
So no matter if your plenum is dry and you dont consume oil It still can be needing replacement,
Sorry, But thems the facts!
Peter

 

well i just got done reading the posts, i have my van its the 127 wheel base with the 5.2. i have the same problem as the post i jus read did all the things that the guy did to his truck. my truck misfires. horribly.. starts runs idles, its great till about 1/2 throttle, or a hill then pop, pop, n no movement.. its so annoyin.. ive done the full tuneup , new cat, temp sensor, coil , cam sensor, all that .. man this truck only has 50000 miles on it as well. now i jus read about the plentum thing.. so ill have my backyard mechanic look into the plentim thingy.. i mean why not jus keep going.. ive spent as much on parts and labor on this truck as what i paid for it.. and its a hog on gas.. wow.... i only paid 1500. for the truck power everything, ac blows cold, three rows of seats n only 50000.00 miles. now im in another 1000. on parts , and 300 in labor.. someone please guide me in the right direction... it would be so appreciated .. im a contractor and i need this truck to support my new baby,but this is soooooo frustrating , and i cant afford to change every single part on this truck. thank u for your time, and anything u can help to advize me on would be so great!!!!!

 

Sounds like a bad fuel pump to me. Have you had the fuel pressure tested?

 

no i havent checked the ful pressure yet.tom. i will be doing that.. but i spell alot of gas coming out of the exaust..it smeels like st8 gas.. the truck runs great , idles great , then put it to the floor and pop pop and it bogs right down.. i wonder about the fuel pressure regulater. does this truck have 1 or is it with the fuel pump.. i also had to change the computer in it a few weeks ago however the problme exisited prior the changing of the ecu, and the company i bought it from allegidley flashed it..