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Update; I got the plugs changed out-actually had IT-20’s in it. Went with it16 this time-ohm’d the coil packs and they all tested the same and were good. Truck smoothed out so went and got some fresh fuel in it. Back to her old self again! It does still do this strange ‘gurgle’ sound at idle...

Was also looking at Denso web site and after putting in year/make/model, it’s telling me IT20? I have ngk TR7’s... not sure which way to go regarding Denso...is the IT16 showing up in a cross reference from the motorcraft numbers?

I was thinking about staying with stock heat range- and paying attention to AFR and detonation conditions. I have a pretty safe tune and have to controller to change spark timing tables- which I have already had to do when 93 octane disappeared from Oklahoma. E3 plugs are intriguing- has...

Thanks for the replys. It does appear that I am running a number colder than stock, even though they are denso iridium. Fuel stabilizers and a few longer-than-normal intervals between drives certainly doesn't help the cause. I guess the big deal to prevent pre-deonation when I got that pulley...

Have a 20k mile '04 with 4lb lower, cat-back, CAI, and have been running the Denso Iridium's for several years, but it seems after a short time, they tend to foul. It is likely due to the truck sitting around more then it likes, and then starting and moving it to clean garage, etc... Likely too...

Does any one know if replacement MotorCraft batteries are available with the "eye" on them. Most dealers dont have them or say they cant get them? Mine is an '07 with the numbers BXT-90R on it.

I do some significant track days in my GT500, and I have only a JLT CAI, 3:73's, and an axleback exhaust...(and lots of suspension mods!). I am going to the dyno this week and plan to set up a tune for road coarse and one for street-the SCT tuner already has a Lund street tune. I'll plan on...

First of all, I ordered the kit from Lethal! Great service, as we all know! I have a stock (except suspension and 3:73s) 2007 GT500. I am the only owner, and decided to get a little engine stuff going...Got the JLT and SCT tuner with the Lund tune for 91 octane. Got it installed, and right...

I am buying a boat this winter-it and the trailer weighs close to 4,000 lbs. My L is an 04 has a 4#lower and Bassani cat-back. I also have a CAI, but no other mods. The truck has been mine since it was new and has 21,000 miles on it. It also has been tuned for listed mods. I installed a...

Just got my Shelby back from my mechanic...now when I roll at neutral throttle or slip the trans into neutral, it howls/whines like crazy...We used the latest pinion bearings and gear assy. that is available. This guy has been a mechanic for Ford for 37 years, and does only powertrain and trans...

Does anyone know the FRPP part number for the 3:73 ring/pinion gear?? I have a FRPP catalog, but I think that I remember reading that there are some revisions to the make of the gear, and thus a new part number. My mechanic already had all the shims, bearings, seals etc..., but I want to get...

I am selling my red 5-door 03 SVT Focus to make a little garage room!! My employer bought me a work truck, so I no longer need to have my Focus as my commuter/DD. My Focus was purchased new in late 2004 by me and I have also ran a CarFax and it is flawless. It has all of the cool factory...

Just wondering if there is a TSB from Ford yet concerning notchy shifts and clutch "disengagement" problems...It seems there are some people getting their clutches and trannys replaced, and some are getting the throw-out bearing shaft properly greased. My GT500 does seem to have notchy shifts...

Hey Focus owners...I was cleaning my 03 SVT Focus (to sell) tonight and turned on my wipers to get rid of some water before drying, and when I turned them off, they didn't go back the "rest" position. Everyting works as far as the delay and high/low speed settings as well as the wash cycle...