"WORK TRUCK DOWN"  I have a 2000 ford e250 van, 5.4, v8. 200k miles. Engine light came on & started…

MobileTireGuy

"WORK TRUCK DOWN"
I have a 2000 ford e250 van, 5.4, v8. 200k miles. Engine light came on & started idling rough when I sitting at red lights.
Took it to autozone and...p0171 & p0174 came up.
I changed the pcv valve and nothing changed. Got a smoke test & and saw a tiny amount from the egr (that's it), mechanic says that's nothing/that's not it.
He then sprayed something at or near the intake I guess, and it slightly changed the idling each time he sprayed.
Before I start handing out money...what do you think? PLEASE HELP!!.

Comments (3)
No. 1-3
MobileTireGuy
MobileTireGuy

Thank you Scotty for responding. I value your expertise. I'll take it to the shop in the morning and I'll make sure that the mechanic knows what you said.

MobileTireGuy
MobileTireGuy

Thank you Scotty for responding.

ScottyKilmer
ScottyKilmer

Editor

classic sign of leaking intake manifold gaskets, known flaw on those