I'm running FRPP 80's in my 14,...............which isn't stock.
I would stick with Ford coils..

 

OEM is one of the less expensive option, did see a HP from Ford.
Tempted to just replace them all, rubber plastic doesn't age well. Cracking of insulation shorts to engine.
With the stick coils, takes the wait until dark. Open hood and look for the sparks on the plug wires.

Thanks for the reply.

 

Sounds like a plug, coil pack or injector. Happens a couple times a minute. Idle, higher rpm. Throttle response a bit off also.

The injector shop in town closed down, so getting them tested and cleaned would be a pain.
So looking at getting a coil stick and injector. Who is using what, No engine mod's.

Worst case I wasted a question.

Thanks Mark.

Moved your post here to our problems section. Do you know which cylinder it is? You can always swap the plug, then coil, then injector to see if/when the problem follows.

 

A new set of spark plug boots will come with the springs. Unless you see a P030X, which is the PCM telling you it's a bad COP, I wouldn't just replace it. Have you replaced the plugs? Have you searched for any stored codes?

 

Hadn't check for the codes, the shop I work with is swamped. The owner will slide by sooner or later. No check engine light, that's a plus. Checked air filter replacing it.
Hadn't considered the plugs with 28 k miles, but they foul. Nothing else pulling them all one may hint with a ya it's me not like the others.

If there is s decent OBDI code reader I would pick it up. Any decent ones out there.

 

Hadn't check for the codes, the shop I work with is swamped. The owner will slide by sooner or later. No check engine light, that's a plus. Checked air filter replacing it.
Hadn't considered the plugs with 28 k miles, but they foul. Nothing else pulling them all one may hint with a ya it's me not like the others.

If there is s decent OBDI code reader I would pick it up. Any decent ones out there.

I picked this one up it’s actually really good. I have an SCT tuner but didn’t want to use that for just reading codes because it would take up a vin spot.

MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Code Reader Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow https://a.co/d/0JGH1XK

 

If you have a programmer for the car, it can retrieve OBD codes. That's what I use.

When I'm chasing issues like that I always change the plugs, because it's easy and might reveal what cylinder could be having issues. I'd pull the boot down and have a look at the spring. If you see corrosion on the spring, you might want to do a boot kit. Might not be a bad maintenance item to add to the plug change.

 

Do you drive your car much? I don't drive mine much so I keep Stay-Bill in the tank. Sometimes this stuff will clear itself if you just get it out and drive it. How many miles on your car.

 

Great question, it's been driven more in the last year than 2 prior year. Had it out 2 weeks ago, put just under 200 miles charity road rally.
Ran great when parked. With the fuel situation my choice is 100LL or 89 Pure gas. Will add some Sta-Bil.

The software I use for a BlueTooth OBDII doesn't talk with anything but motorcycles.
Reading the reviews, seems many Scanners have challenges like anything close to run data. Maybe a sample at one point in time.

Didn't plan on tuning yet, will go by visit a and see what the Snap-on scanner he has finds.

 

Great question, it's been driven more in the last year than 2 prior year. Had it out 2 weeks ago, put just under 200 miles charity road rally.
Ran great when parked. With the fuel situation my choice is 100LL or 89 Pure gas. Will add some Sta-Bil.

The software I use for a BlueTooth OBDII doesn't talk with anything but motorcycles.
Reading the reviews, seems many Scanners have challenges like anything close to run data. Maybe a sample at one point in time.

Didn't plan on tuning yet, will go by visit a and see what the Snap-on scanner he has finds.

Did you burn 100LL in your car? It is an aviation fuel that will cause problems in cars. I also would not run 89 octane. You need 93/91 octane automotive gas.

 

That would be sweet, sources for fuel not defiled is unobtanium. Sunoco used to along with all Top Tier providers.

Is everyone with tuners on just pump ethanol fuel mix or E85, do they deal with flipping them around.

No, haven't run any LL, should have this tied down. A plug check should give a hint or who isn't happy.

 

If you run E85 you are stuck with that. I don't think you can swap back and forth without a tune. There is a lot to change when converting to E85. Personally i am not sure it's worth the cost. You gain some HP but lose millage. I have a 07 and changed the pulley and CAI and gained about 100 HP at the wheels. I have the JLT setup. All my smog crap is still on the car.

 

Makes sense, the term Flex-Fuel made me ASSUME it was done on the fly.
I am very anti ethanol as presently setup. Cars made for it should at least break even not cost energy to be cleaner while being inefficient at the same time.
Have one injector coming in today. Friend (with scope) was going to just move the injector with the cylinder code\ and then retest. No need replace and fix or move on. Getting one coil stick wasn't as easy.
Miss the injector shop, took 12 off of broken bike's to get 3 sets matched for the engine. Flow/Time getting those 3 cylinders all the same helped me gain over 13% hp and just about torque.
With an 07 any service you've needed like spark plugs, COP, injectors, hard rubber etc. etc. Once they get over 10 years some of the soft bits no longer are and some crack.

Done any replacement or mods for the suspension, it's not as tight as I expected.

 

The PCM in the GT500 is not flex fuel capable. Ford has provided for that in other engine lines. For the GT500 you either set up the tune to run one fuel or the other. But, injectors and fuel pumps need some beefing up to handle the additional fuel requirements if you're taking advantage of higher boost. There are aftermarket computer controls that can make it flex fuel capable.

 

Took the car over and the scanner said 68 mis fires on cylinder 8.
One mis fire on cylinder 1.

Might as well check all the plugs no drama until cylinder 1. It is not playing well with the others and play ball.

Day of PB blaster soaking in the cylinder may have helped the others. Believe the torque is 13fp, took about 30 to move 1/16 of an inch, will let it soak and see if I get the 16th back tightening then try to gain a little more doing daily tests for a week or until it lets loose with 1/4 inch of penetrating oil in the cylinder.

 

Took the car over and the scanner said 68 mis fires on cylinder 8.
One mis fire on cylinder 1.

Might as well check all the plugs no drama until cylinder 1. It is not playing well with the others and play ball.

Day of PB blaster soaking in the cylinder may have helped the others. Believe the torque is 13fp, took about 30 to move 1/16 of an inch, will let it soak and see if I get the 16th back tightening then try to gain a little more doing daily tests for a week or until it lets loose with 1/4 inch of penetrating oil in the cylinder.

It’ll come out. Just takes more patience than any human being has. Had a stuck plug on my truck a few months back. Thought the darn thing was going to stay in for the life of me. Several rounds of PB blaster, some careful tightening/loosening, and it finally came out. My forearms looked like Popeye when I was done. 😂. Good luck.

 

If your truck was the 04-07 3v, you don't need to worry about pulling threads out of the cylinder with your Shelby. You always going to have some amount of carbon on the threads to add to the removal process, but you're in no danger removing these plugs with a bit of force.

You don't need a colder plug with stock boost.

 

Good info on the truck, didn't seem anyone differentiated any differences between engines. Just the 3 valve head the sticking.
Brand and type preferred and to avoid. The reasons why iridium and not.
I'm putting in some double iridium's Champion, for $4 a plug deal.
Don't plan on leaving them in, more than likely I'll pull them every winter. Scope cylinders and just clean her and do service.

Is there a delete button, LMAO. Connected to a WOW switch, only available in flight feature.

 

Limited edit features.

 

Happy hands.gif

• Indy
• Jul 24, 2022

 

Nothing wrong with iridium. They're just expensive and it seems modified cars go through them before you get the life expectancy out of them. That's certainly the case for me. But, with a lightly modified car, there's no real reason to avoid them. I have a set of TR7IX in my car at the moment.

I had a 2008 F-150 with the revised head, which used a traditional style spark plug. It was a mid-year change. I heard a lot of horror stories. I had a friend of mine that had 100k on his 2005 and I told him to take it to Ford for the plug change, so they would have to deal with it if they broke one. He paid out the nose for it, but they removed them without a thread issue.

 

Wanted to give some updates. Buddy put the magic box, says 86 misfires on cylinder 8 and 1 on cylinder 1.
Ordered new plugs, while replacing them found 8 had discoloration of the valve cover from water the plug showed some rust on the plug top.
Cleaned the coil, the long tube doesn't make the cleaning the mating surface well. Swapped 8's coil with 5.
Since I started on 8 last was 1. Took 3 days to get one out, it was serious nail biting.

Fired it up and no change. WTF,, so coil or injector. The magic box said cylinder 5 is having issues.

Question is stock, seems the GT500 uses the HP coils. Replace with the same? Granatelli has some saying 60k volts.


Second question is one or all 8 coils. I'm inclined to do them all. Plastic, rubber etc. don't age well.
Don't expect any tuning needed even with upgraded coils, before I found out the coil was bad was looking at injectors.
I'll push for a twofer, injectors worth an upgrade, once done tuning required or highly suggested.

Thoughts, trolling for flames and or your 2 cent's. Like one, love the other.

 

I don't know any of the high performance coils that don't fail with time. They just are not reliable. I'd give them a hard pass. You don't really need larger injectors until you start turning up the boost. With the exception of the stock injectors, any change will require a tune.