Swervin309

Last week i pulled all 8 plugs, cleaned them, and gave the engine the Seafoam treatment. Now she has an inconsistent miss and will sometimes stumble at WOT between 1500-3000. Did i make a boo boo or could it be something simple?
When SF is added to the fuel and left in there for a certain period would it have a negative effect on the fuel? I'm not prepared nor willing to shell out $90 on new plugs.

howarmat

its most likely plugs man, make sure they are put back in correctly.

Swervin309

You're probably right. I'm waiting for her to cool off so i can check em out. FFFFFFFFFUUUUUUUUUUUUUUUUUU.....

Goldenpony

The 2 piece crap plugs from the factory are quite fragile. A lot of times, the torque to remove them will screw them up inside and cause just such a miss. You might be looking at a new set of plugs after all. Were they hard to get out?

Swervin309

Yeah, i had to put a little @$$ behind em. I started playing around and i determined that it was the #2. I unhooked the injector harness on each one until i got a consistent miss. Is it safe to swap just one plug or is it better go ahead and do em all?

07 GT E UPP

At this point, If I was you.... I would replace them all, and with proper gap..!!

Swervin309

Yeah, i did. I was sure to put anti-seize compound on them. Runs like a dream. Unfortunately, the gap on the plugs in non-adjustable.

hammeron

glad to hear it all worked out

Simon1

Where did you hear that? I adjust mine down to .034.

moosestang

I adjusted mine using a big C clamp and a socket.