kkroll86

for starters i have a 2000 GT with a 4.6 and it has 144,000 on it. the only thing that has been changed is there is SLP load mouth exhaust and a chrome intake put on.


So last summer i was having a problem when i was giving it gas or putting it under a load, it would sputter ( can tell starting in 3rd gear). So i went through and changed all the plugs and ignition coils. Car ran good for about a month or so. Then the same problem started coming back and it threw a CEL. I got it scanned and it said there was a misfire on a cylinder 1. so i changed one of the injectors figuring that would be the problem...didn't help. so i went to the fuel filter and changed that thinking it was probably just plugged...ran a little bit better but it still has that sputter. I am looking for a couple more things that I can do for myself before i bring it in to get looked at.

JC316

Does it lose any water? Did you gap the plugs properly? What brand of coil did you use?

JJ Glo

Maybe a dirty MAF sensor?

kkroll86

it doesn't lose any water, I didn't gap the plugs i just bought new ones and replaced them, and the coils are just OEM replacements

JC316

Guessing your gap is off then. Plugs don't come pre-gapped.

kkroll86

do you know what the gap is suppose to be. I can check them and see if thats the case, also if i unplug the MAF and take it for a ride will it bypass it or will it just run crappy anyways?

JJ Glo

I think the gap is supposed to be 0.52-0.54

JC316

0.52-0.56. Most plugs come gapped around 0.40.

kkroll86

thanks i'll give it look and let you know what I find..

kkroll86

gap was fine ended up one of the new coils was not working out of the box replaced it and car runs great!