misfire issue

[Jackpine]

Longshot, the intake is just a drop in filter in the Gotts Mod option, so it shouldn't cause problems. But I agree, the other mods are possibly creating some difficulties.

NITEMARE, when you say it "misfires", this sounds like a spark problem. And, this happens at a steady, low speed below 45? I don't know why you'd have spark problems at such a low load.

Have you cleaned the MAF sensor and the intake area that surrounds it?

- Jack

[NITEMARE07]

JackandJanet, I have cleaned the intake system extensively and hasn't had an impact. When I say it "misfires" it simply "skips" like an older carbureted engine. No bucking involved. When I give more gas to the engine it clears out. Im thinking its all in the programmer since it doesn't do it when the programmer is set to transmission only mode. While we are on the topic, what is the difference between flex fuel 5.4 and normal 5.4? Other than injectors and tune.

[ticopowell]

Originally Posted by NITEMARE07

JackandJanet, I have cleaned the intake system extensively and hasn't had an impact. When I say it "misfires" it simply "skips" like an older carbureted engine. No bucking involved. When I give more gas to the engine it clears out. Im thinking its all in the programmer since it doesn't do it when the programmer is set to transmission only mode. While we are on the topic, what is the difference between flex fuel 5.4 and normal 5.4? Other than injectors and tune.

The difference between the flex and the not so flex is the gaskets and rubberized material is made to better withstand the ethanol. There might be a few other small differences but that is the biggest as far as I know

[Jackpine]

Originally Posted by ticopowell

The difference between the flex and the not so flex is the gaskets and rubberized material is made to better withstand the ethanol. There might be a few other small differences but that is the biggest as far as I know

^^^ What he said ^^^ (That's my understanding, anyway.)

NITEMARE - I can't really think of anything you can do to fix the problem you're having. It sounds to me maybe like the A/F ratio isn't quite right at that no load condition (possibly too lean) and when you open the throttle, it (maybe) becomes richer.

I'd have to say Bill is going to have to adjust your tunes, so you'll need to get in touch with him. (And I know that's sometimes difficult.)

- Jack

[NITEMARE07]

That's my theory as well. Oh well, just gives me a excuse to pay the guys at php a visit!