2016 GT/CS - Cylinder 4 and 8 Misfire - 1600 miles
05-28-2016, 05:18 PM
#11
4th Gear Member
Join Date: Jul 2011
Location: Michigan
Posts: 1,329
yeah, if it turns out to be contaminated gas then the tune won't void the warranty. Though if it is bad gas, Ford probably still won't pay for it, since it's not a defect. Your recourse will then be to get the gas station/company to reimburse you for the repair.
05-29-2016, 05:46 AM
#12
3rd Gear Member
Join Date: Feb 2006
Location: Connecticut
Posts: 558
The only way they can void his warranty is if they can prove that it was caused by the tune..with it back to the stock tune and still doing it, it will be pretty hard for them to prove. I wouldn't sweat it, sounds like bad gas to me..it would be quickand chep for them to just drain it and put some good gas in there for a check. It was running fine until you filled up, it only makes sense that it would be the first thing to check/blame.
05-30-2016, 07:53 AM
#14
Moderator
Join Date: May 2006
Location: Michigan again!
Posts: 8,579
The only way they can void his warranty is if they can prove that it was caused by the tune..with it back to the stock tune and still doing it, it will be pretty hard for them to prove. I wouldn't sweat it, sounds like bad gas to me..it would be quick and cheap for them to just drain it and put some good gas in there for a check. It was running fine until you filled up, it only makes sense that it would be the first thing to check/blame.
05-30-2016, 08:10 AM
#15
3rd Gear Member
Join Date: Feb 2006
Location: Connecticut
Posts: 558
The MM act specifically states that that law will NOT cover aftermarket performance parts. The act is there so one cannot be denied warranty coverage should you replace oil or air filters and spark plugs that aren't OEM. This lawyer has been down this road and will tell you you're basically screwed.
http://www.mustangevolution.com/foru...1/#post2371837
http://www.mustangevolution.com/foru...1/#post2371837
09-04-2020, 02:13 PM
#16
Join Date: Sep 2020
Location: Ca
Posts: 7
Hey everyone same thing happening to me cyl 4 misfire p0304
P0304 and p0308 Same thing happening to me I have a 2015 mustang gt and it’s misfiring on cylinder 4 it’s not all the time and come in and goes mostly when I rev past 3k and let rpm drop, if I wot rev past 4K rpm the car runs good . Once it drops it starts misfiring bad ! I have checked most things changed spark plugs for motor craft . Changed coil #4 to a new one. Changed the injector to another cylinder and persists on cyl 4, the other day it randomly threw cyl 8 misfire too. We checked compression and seems normal on all cylinders , When the car runs good it’s hauls and runs like brand new . 70xxx miles on it I bought from dealer about two months ago the car used to have Procharger and tune ngauge hptuners, but I guess was put to stock . Checked resistance for injectors and for wire . Help please maybe a crank relearn or a KAM reset??
09-04-2020, 04:48 PM
#17
Join Date: Sep 2020
Location: Ca
Posts: 7
Did you figure this out hellion850???
Hey everybody
Wanted to get some opinions on this. Right now the Mustang is in the shop.
My car is a 2016 Mustang GT Premium California Special Auto
I bought it brand new.
It has 1600 miles, a few good pulls but mostly daily driving 20 miles to work on backroads or in traffic.
Mods
AirAid CAI - the one that does not require a tune
BAMA Tune
I have been running the CAI and the Bama tune for about a month with no problems whatsoever and enjoying the car as my DD.
I drove home Monday night, filled my tank at the Valero next just down the street and went to bed.
When I woke up, I opened the garage door and remote started the car like I do every morning to warm the engine up before I go to work. When I got to the car I noted the CEL was blinking and when I sat in the seat I noticed the car was shaking.
Plugged in the tuner to find that I was getting a P0308 code. Cylinder 8 misfire. I reset the tune back to stock and drove around the neighbor hood. Reset the battery etc. to see if anything would change and it persisted each time after clearing the codes and restarting the car. The big point though was that the same physical symptoms persisted. The car violently shaking when idle.
So I took it to a dealership close by as I have warranties and extended warranties. Left the CAI on but with the stock tune. They held on to the car for two days with little to no communication and the result was that they could not figure it out. They said no way that the CAI did this and also found out that cylinder 4 is also misfiring but not registering that it is (no code thrown).
They tested compression, crankshaft sensor, etc etc. and came up with nothing. I ended up taking the car back to the dealership I bought it from as they were offering a loaner so I can get back to work.
They asked for the stock airbox so they can reinstall it and continue diagnostics. They dont think it was the CAI either but they have to resintall the stock airbox to prove it. They also have no idea what is causing any of this.
BAMA says it has nothing to do with their tune. Some have said "bad gas" but this gas station is 6 months old and ran very well and I fill up there once a week. The mechanic currently working on it said "Ive worked on cars for 30 years and have seen bad gas once."
Looking for some opinions as I am mentally freaking out that if it was something like the bama tune that did this, warranty wont cover it.
Wanted to get some opinions on this. Right now the Mustang is in the shop.
My car is a 2016 Mustang GT Premium California Special Auto
I bought it brand new.
It has 1600 miles, a few good pulls but mostly daily driving 20 miles to work on backroads or in traffic.
Mods
AirAid CAI - the one that does not require a tune
BAMA Tune
I have been running the CAI and the Bama tune for about a month with no problems whatsoever and enjoying the car as my DD.
I drove home Monday night, filled my tank at the Valero next just down the street and went to bed.
When I woke up, I opened the garage door and remote started the car like I do every morning to warm the engine up before I go to work. When I got to the car I noted the CEL was blinking and when I sat in the seat I noticed the car was shaking.
Plugged in the tuner to find that I was getting a P0308 code. Cylinder 8 misfire. I reset the tune back to stock and drove around the neighbor hood. Reset the battery etc. to see if anything would change and it persisted each time after clearing the codes and restarting the car. The big point though was that the same physical symptoms persisted. The car violently shaking when idle.
So I took it to a dealership close by as I have warranties and extended warranties. Left the CAI on but with the stock tune. They held on to the car for two days with little to no communication and the result was that they could not figure it out. They said no way that the CAI did this and also found out that cylinder 4 is also misfiring but not registering that it is (no code thrown).
They tested compression, crankshaft sensor, etc etc. and came up with nothing. I ended up taking the car back to the dealership I bought it from as they were offering a loaner so I can get back to work.
They asked for the stock airbox so they can reinstall it and continue diagnostics. They dont think it was the CAI either but they have to resintall the stock airbox to prove it. They also have no idea what is causing any of this.
BAMA says it has nothing to do with their tune. Some have said "bad gas" but this gas station is 6 months old and ran very well and I fill up there once a week. The mechanic currently working on it said "Ive worked on cars for 30 years and have seen bad gas once."
Looking for some opinions as I am mentally freaking out that if it was something like the bama tune that did this, warranty wont cover it.
mine is doing the same on cyl 4
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