A buddy of mines just had his fuel filter and plugs changed...Gapped his ford motorcraft plugs at .044 and they are tight...The tech told him that when he started the truck it's idling strange.. It has a lopey cam idle and has a rotten egg smell coming out of his exhaust..He also says the truck is shacking bad..Can anyone offer us some help please??..

Thanks..Lay

He has an 02 with 38,000 miles
only mods are a diablo chip, JL air box and boost bypass w/ JL ram air

 

Isn't a .044 plug gap a little big? I always thought they should be gapped around .035-.038.

 

Sounds like maybe one of the coil packs didn't get put on properly. I would start there. Also look to see if a vacuum line got disconnected, but this will usually throw a code. Good luck.

 

Sounds correct to me..

PEacE.................
Jim

 

Sounds like one or more not firing. Check coil connections or a dropped/damaged plug. gap sounds too big.

 

I agree with the earlier post. It could be a faulty or loosely connected coil pack. I believe the plug gap is way to large. I think the plug gap should be 0.40 to 0.42 Max for stock. Just my 2 cents.

https://www.f150online.com/galleries...y.cfm?gnum=720

 

OK i'm sorry he gaped .056 and the vaccuum lines and coil packs are on tight.... Isn't that too high?? He told me his mechanic said that this is ford specs (gapped at .056)??? Doesn't sound right to me..This sounds rediculous... my TR6s are gapped at .044

 

thats a perfect gap if hes renning an 80's style GM HEI distributer

 

Ok...now he called me back and says he gapped it at .046(factory specs).. Sorry guys for the confusion.. Still we are at a loss as to whats going on

 

try new mechanic????

 

theres always one jackass out the bunch..

Thanks guys for your help... Come to find out one of the vacuum lines wasn't connected...

Thanks again..My buddy was getting kinda worried..

 

.046" is fine with stock pulleys.

Everyone has been running big pulleys for so long they freak when they see the stock gap which is .042" - .046".

 

I'll be sending you a bill on this. Please forward your address to me so that I can make sure you can pay me for my technical advice. j/k

Glad you found the problem and got it corrected.