The-Sarge

Hello. New member here.


I have what may be a strange question.


I just bought a used 2013 Mustang GT, that had some mods done. One of them was the installation of a JLT Cold Air Intake. I know these intakes must have a performance tune for the engine to work properly.


However, the dealer had no idea what kind of a tune had been done. Is there a way to read what kind of tune has been uploaded to the vehicle? If so, where in the GTA would I go to have this done.


I'm asking because at this stage, I'm not even sure what octane level of gas to put in it. I don't know it the tune has made it mandatory to use 91 octane, or if I can put in 87 octane. This is a daily driver, and I'm not interested in completely maximizing my HP at the cost of affordable gas.


Any info or insight would be greatly appreciated.

Apocalypse Pony

Welcome. I'm no expert, but I think without the hand held unit that installed the tune, it will be tough to tell what you have, I think. Maybe take it to a Ford dealer, they should be at least able to tell you that its not a factory tune. Better yet, you should have the info for whoever owned the car before you, get in touch with them and find out WTF. The Used Car Information package is law, and should have the ownership history. Trading in a car with no info on a tune is a chump move, probably weaselled a few extra bucks by selling the tuner independently instead of doing the right thing and either returning it to stock, or keeping the tuner with the car. Unless your cold air intake doesn't need a tune, there are some out there that don't, but as I said, i'm no expert. Best of luck, post some pics, and congrats on the new ride.

The-Sarge

The dealer I bought it from is a Ford dealer, and they have no idea. They got the car from Ford Canada after the car was traded to them, so the dealer has no information on the previous owner or the mods done.


The air intake definitely needs a performance tune. It is mandatory for JLT intakes just to calibrate the mass air sensor for the larger amount of air it moves, so it couldn't be returned to stock. I just don't know what else was done with that tune.


At this point, I just want to know what type of gas I can put in this thing.

Ray Spencer

If your 2013 Mustang GT already has a JLT Cold Air Intake it most likely already has a tune installed or else your check engine light would be coming on. If you still need a tune the link below should help;

JLT Performance Mustang Cold Air Intake CAI-FMG-11 (11-14 GT) - Free Shipping

The dealer can't be to swift if they cannot tell what type of octane fuel to use but most Mustangs from the factory run on #87 Octane...91, 97 etc usually has more to do with performance gains. If the vehicle has an owner's manual it should give you some fuel information.

If you need to know how the vehicle originally came equipped from the factory use this site's VIN decoder. Simply put your vehicle identification number into the decoder. The decoder is located under tools.

http://indianapublicmedia.org/amomen...ctane-numbers/

Read this story http://www.torquenews.com/106/2013-f...ove-buying-gas

Ray Spencer

A lot of what AP says is usually right and bang on!

def67

The jlt neads a tune as others have said. The guy that sold the car to the dealer would have to put the stock tune back on the car if he wanted to sell the tuner or it would be locked to your car anyway. Unless he's going to try and sell a locked tuner. Hopefully he put the stock tune back on then you could put the stock air box back on and you will be good. If not I'm not sure if you can even buy a tuner for it and upload a new tune?

The-Sarge

Thanks for the information.
I know that a mustang with a stock tune can run on 87 octane. In fact, it is the recommended fuel in the manual.


I also know it is possible to do a performance tune for higher octane levels. I'm not sure if the performance tune on the car has done this or not.


Perhaps a better question would be, if it has had a performance tune to a higher octane level, and I started using 87 octane, would there be any problems, or would it just result in cancelling out some of the performance gains from the tune itself?


I appreciate all the help and advise. I know this is kind of a far out there question.

Ray Spencer

You could give DaSilva Racing a call, contact info below. They are also on Face Book. DaSilva Racing - Your home for Mustang aftermarket performance upgrades!

The-Sarge

The JLT intake can't run on the stock tune. The check engine light would be coming on. So it couldn't have been returned to stock. And he could have had the car dyno tuned at a performance shop at the time the intake was installed. It didn't have to come from a hand held tuner, so there may have been no way for him to return it to stock in the first place.

The-Sarge

I'm trying to avoid that. I have had dealings with DaSilva before with my 2005 Mustang GT, and was not very impressed with them when it was all said and done.