2001 Taurus Sel Duratech

#1

I have a 2001 Taurus SEL w/ Duratech engine–When idling in drive at a light or similar situation, the idle gets rough and the check engine light comes on—when my mechanic kicked the code, it said problem with # 5 cylinder–Switched plug and wire with cylinder next door and same problem with # 5–Now, the kicker is that it clears up on its own and runs smooth as ever. I know about carbs from my youth and we used to have a problem with the needle valve picking up dirt, but I can’t understand that if it is some type of debris affecting the EFI, why is it only affecting the same one cylinder–Hate the Elect. trans and overdrive also in this car

#2

While you’re playing swap, swap out #5 fuel injector with another position. Result?

#3

And check the compression while you’re at it - all cylinders, but esp. look at cylinder 5. How many miles are on it?

#4

Thanx–52,000 miles–99% of the time it runs like a champ