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Recently I've noticed rhythmic fluctuations in AFR at idle while the engine is still warming up. Every 4 or 5 seconds the AFR jumps from ~14 to ~15, and results in a corresponding drop in RPM at the high end of the AFR. This seems to disappear when the engine has warmed up. Any ideas?

There are a ton of them on dealership lots now, most listed at below MSRP. Would be kind of neat to have another FPC V8 vehicle. Main issue for me is a lack of back seat; my daughter wouldn't be able to ride in it for a number of years. Tempting though. Have to figure out how to start...

So it looks like after 6 years of ownership I am finally going to have to take my car in for some warranty work and take advantage of the ESP I paid for. My AC compressor was whining and warbling for quite some time and today I lost cold air from the driver's side vents; the passenger side still...

Today I noticed the car having trouble cranking over. The voltage readout in the center screen while driving was between 12.1 to 12.9V with occasional spikes to 14.5V. If the car is on and the alternator is working, shouldn't the voltage be in the 14.5V range constantly if the battery is low...

I just received some new rotors and unfortunately one of them arrived damaged. There is a raised lip on the edge of the inside surface. See attached photos. I emailed the Ford dealership parts website I ordered them from, so let's see what happens. But will this cause any issues if installed...

I'm chasing a clunk/click on the front passenger side when going over bumps and on uneven pavement. All fasteners are tight. Ball joints seem fine. But I am able to very easily rotate my rearward LCA and when I do it makes this clicking and clunking noise. Is the bearing toast on the chassis...

I took the car out for a spin the other day and noticed a clunking and popping noise on the front passenger side going over bumps and imperfections in the road. It sounds different than last year when my strut top nut was loose. I checked all the fasteners and nuts and everything is tight...

I am considering picking up the FP sway bar and spring kit for the GT350. However I am unsure about the installation of the rear springs. The FP instructions state to essentially disassemble a lot of the arm and knuckle assembly, which requires removal of the muffler and exhaust to access the...

I'd like to replace one of my OEM sets with some lighter aftermarket wheels, while sticking to the OEM look as much as possible. I also track the car and bang it off the curbs quite a bit. Any recommendations for a reliable wheel?

What is the part number for the 2019+ non-drilled rear rotor? Is it KR3Z-2C026-B? Also I assume these are not directional (unlike the fronts) because there is only one part number for left and right. Thanks! https://parts.lakelandford.com/p/Ford__/Disc-Brake-Rotor/75171555/KR3Z2C026B.html

Decided to check the alignment after 14300 miles. I noticed that I have the prototypical accelerated wear on the inside shoulder of both front PSS tires. Sure enough I have -0.08 total toe, which is probably the culprit. I'll have to get that corrected when I buy new tires. Caster and camber are...

I signed up for the one at NJMP Thunderbolt in a couple of days. I was just curious if anyone had any experience with Track Night in America events. Looks like a pretty cheap way to get on track but I'm concerned that this will also attract a bunch of yahoos...... Anyway, main reason I signed...

Long story short I installed SPL LCAs and tension arms and one of the mounting studs snapped on the passenger side when I sat in the car a couple of days later. The car is in my garage and the driver's side is against the wall (about 1.5 feet from the drywall). I am going to switch back to stock...

Anyone know why the recommended alignment specs in the GT350 supplement differs so much from year to year? The 2018 specs have the lowest camber numbers. The 2019 front specs are the only one with positive toe. The 2020 specs are back to toe out but with the same camber as 2019. Very...

I purchased a set of SPL LCAs and tension rods a couple of months back since my stock LCA bushings are toast. I was wondering if anyone had any installation tips and tricks (both with the install of the new arms and rods but also with the removal of the OEM ones). Any guidance will be greatly...

I am looking to replace my LCAs because the bushing in my driver's side arm is toast. I was wondering if anyone is running either of the spherical LCAs from OP Mustang and if you have any reviews or suggestions. I attend 10 to 12 track days a year and the rest of the time the car is street...

Driving home today I noticed a clunk/creaking noise when initially applying the brakes (the initial weight transfer moment) and also while going over speed bumps. I can feel the clunk in the brake pedal. Any ideas what I should look for first? I am going to try to diagnose and fix myself if easy...

I'm heading over to PittRace for a couple of days at the end of May. I have never been there but have watched some videos; seems fun and a bit like VIR but without the long back straight. Any tips or tricks anyone might care to share?

Does anyone have the shop manual pages describing the replacement procedure for the rear rotors? Thanks in advance! :like:

In preparation for a track day I emptied my passenger side catch can and washed and re-installed my FP air filter. Upon first start up the engine seemed to be stumbling and the RPM was fluctuating as was the air/fuel ratio (falling to 12 and jumping up to 16). Any ideas what the problem might...