Ford F-150

SSGKRA

MEMBER
2003 FORD F-150
V8
2WD
AUTOMATIC
59,000 MILES

I have a 2003 F150 4.6L that has 59000 miles on it. It has started a missing of some type in it. It is making a popping noise back through the air filter. You can fill it on take off and when you drop it down into drive. It does not hurt the gas mileage, it is not bringing up a code, and I have changed the mass air flow sensor, and the plugs. What could be causing this.

1 Reply

CJ MEDEVAC

MECHANIC
11,005 POSTS

I had a similar issue with the wife's escape, also 2003, but a 3.0

It would Stud-d-d-d-der for a second or so, when climbing a slight hill or more.

The 1st thing I did was replace the plugs--it helped some, maybe 30%

They told me several things to look for

One being a vacuum leak

The other was EGR

I removed and cleaned the EGR the best I could, I even used vacuum from my Jeep CJ 5 to actuate it while trying to clean it

It did improve, but the EGR Piston and Seat, were nearly impossible to access for a proper cleaning

I could suck air by the piston, using my mouth, via the hole to the exhaust. Was not much, but it was not 100% sealing off.

I replaced it a few days later, with a new one

That was the ticket!

Let me know if this helped.I did take some pics!--Remember, This is an ESCAPE 2003--3.0

The Medic

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