limp mode after tune

[stangyota]

LTH and CAI went into limp mode after agressive launch several times after several tune up grades. has anyone experience the same situation?

Sponsored

 

[SH!FT]

If you did the install:
Check for codes. Check any sensors touched during the install. Check for melted wires against exhaust. Data log.

If you paid shop to install:
Stop launching. Bring back to shop. Hold them accountable.

 

[GrayMater22]

Are you 100% your tune downloaded properly, I had this issue because my battery was too weak, but the device (SCT X4) acted like the tune downloaded, drove it and it threw 2 codes related to afr (running lean) due to the 114mn cai. Where did you get your tune? Long story short, I had to hook my wife’s Cherokee to my battery while running just to properly download the tune.

 

[ORRadtech]

Are you 100% your tune downloaded properly, I had this issue because my battery was too weak, but the device (SCT X4) acted like the tune downloaded, drove it and it threw 2 codes related to afr (running lean) due to the 114mn cai. Where did you get your tune? Long story short, I had to hook my wife’s Cherokee to my battery while running just to properly download the tune.

I thought it was always recommended that cars be hooked to a battery charger/ maintainer before trying to download a tune or any kind of software update?

 

[Cordero1]

I thought it was always recommended that cars be hooked to a battery charger/ maintainer before trying to download a tune or any kind of software update?

This is the 1st time I've heard of this recommendation

 

[ZXMustang]

This is the 1st time I've heard of this recommendation

Only when doing a full write.

Whos the tuner?

 

[GrayMater22]

I thought it was always recommended that cars be hooked to a battery charger/ maintainer before trying to download a tune or any kind of software update?

Yes, I found that out the hard way, but many do it without one. I think it depends on how strong your battery is at the time and how long the tune takes to download.

 

[Robottrainer]

Are you 100% your tune downloaded properly, I had this issue because my battery was too weak, but the device (SCT X4) acted like the tune downloaded, drove it and it threw 2 codes related to afr (running lean) due to the 114mn cai. Where did you get your tune? Long story short, I had to hook my wife’s Cherokee to my battery while running just to properly download the tune.

I had this happen to a 13 Shelby. Didnt connect a charger. Tune loaded and started throwing bank rich codes. Not putting two and two together I replaced the MAF. Re-did the tune a second time. Made it worse until it wouldnt idle. I had to disconnect the battery, turn everything on to drain the capacitors and then reload with a battery charger attached. The tune draws alot of battery power.

 

[young at heart]

Guys, straighten me out here If I’m wrong but I don’t think I’m far off. The title of this thread could almost be a tattoo.

Has anybody ever modified and/or tuned one of these cars and it didn’t result in some kind of problem down the road that required additional work or retuning to make it run right? It seems like virtually every time someone asks for help with CELs, codes, driveability, etc. it turns out their car has been jacked around with by some tuner who thought he could outsmart Ford engineers.

I mean let’s face it. Getting some extra ponies for not a lot of cash is really appealing, right up to FI. But is it worth creating an ongoing problem in a car that’s already a pretty strong runner and reliable?

Remember the old Popiel Showtime Oven where you could “set it and forget it”? If that applied to tuning a Coyote I’d be all over it, warranty be damned. But it seems like the complete opposite is true.

 

[ZXMustang]

Guys, straighten me out here If I’m wrong but I don’t think I’m far off.

Has anybody ever modified and/or tuned one of these cars and it didn’t result in some kind of problem down the road that required additional work or retuning to make it run right? It seems like virtually every time someone asks for help with CELs, codes, driveability, etc. it turns out their car has been jacked around with by some tuner who thought he could outsmart Ford engineers.

I mean let’s face it. Getting some extra ponies for not a lot of cash is really appealing, right up to FI. But is it worth creating an ongoing problem in a car that’s already a pretty strong runner and reliable?

Remember the old Popiel Showtime Oven where you could “set it and forget it”? If that applied to tuning a Coyote I’d be all over it, warranty be damned. But it seems like the complete opposite is true.

You’re a lot of very wrong. Lots.

 

[young at heart]

You’re a lot of very wrong. Lots.

OK. I‘m listening.

Trying to learn, not argue.

 

[ZXMustang]

OK. I‘m listening.

Trying to learn, not argue.

Well where to start. Sure there are good and bad tuners. But tuning a factory stock gen 3 coyote is a very good way to get the 10R80 to behave a bit better as well as getting a noticeable power increase especially with E85. Which you can run easily on a stone stock gen 3.

Trans tuning alone is worth the price of admission. Now as for CELs and whatnot, that's an EPA issue. If you decide to run no cats, then eventually your car will throw a few codes in relation to emissions. And "some" tuners will still disable those codes for you in the tune, and some wont. The big names for sure wont, but a few of the lessor known ones still will.

Once a car is tuned, its pretty much tuned. There are adaptives for the trans and also long term fuel trims that can stand to be reset with a battery pull for a few hours once a year. But aside from that, its nothing different than a factory tuned car. And to be honest, Ford's factory calibrations leave a lot to be desired but for good reason.

Remember these cars are driven by all walks of life, in all altitudes and climates with all types of octane fuel used. Some will take care of them, most wont. They are tuned for all around performance in any scenario.

For our use cases being enthusiasts, we tend to use better fuels and take better care of these cars. We also want to use them at higher levels of performance. And for that, they need refinement. They can be leaned out, timing can be increased and ramped in sooner and faster. in some cases knock sensors can be adjusted. There are several hundred parameters that can be tweaked to stop or allow the car to do more or less with the hardware it was built with.

Personally, with the help of Wengerd, I have been tuning my car on my own. I have had the pleasure of making and remaking the different drive modes do many different things in relation to accelerator pedal, shift schedules and shift points, active exhaust valves as well as many other characteristics. I've had a peek under the hood so to speak and frankly Im surprised how shoddy the factory tunes really are. Ford has over-engineered the car to make thousands of decisions over a millisecond as to what timing table it wants to use and how much of it. Its quite baffling how complicated they made this car's calibration is comparison to GM LT cars and current gen Mopars. Coyote's are by far the most complicated to tune compared to the others.

But yes with a good tuner, who is responsive and has good customer service, a tune is a great thing for these cars to correct and adjust all the strange calibration decisions Ford made.

 

[young at heart]

Well where to start. Sure there are good and bad tuners. But tuning a factory stock gen 3 coyote is a very good way to get the 10R80 to behave a bit better as well as getting a noticeable power increase especially with E85. Which you can run easily on a stone stock gen 3.

Trans tuning alone is worth the price of admission. Now as for CELs and whatnot, that's an EPA issue. If you decide to run no cats, then eventually your car will throw a few codes in relation to emissions. And "some" tuners will still disable those codes for you in the tune, and some wont. The big names for sure wont, but a few of the lessor known ones still will.

Once a car is tuned, its pretty much tuned. There are adaptives for the trans and also long term fuel trims that can stand to be reset with a battery pull for a few hours once a year. But aside from that, its nothing different than a factory tuned car. And to be honest, Ford's factory calibrations leave a lot to be desired but for good reason.

Remember these cars are driven by all walks of life, in all altitudes and climates with all types of octane fuel used. Some will take care of them, most wont. They are tuned for all around performance in any scenario.

For our use cases being enthusiasts, we tend to use better fuels and take better care of these cars. We also want to use them at higher levels of performance. And for that, they need refinement. They can be leaned out, timing can be increased and ramped in sooner and faster. in some cases knock sensors can be adjusted. There are several hundred parameters that can be tweaked to stop or allow the car to do more or less with the hardware it was built with.

Personally, with the help of Wengerd, I have been tuning my car on my own. I have had the pleasure of making and remaking the different drive modes do many different things in relation to accelerator pedal, shift schedules and shift points, active exhaust valves as well as many other characteristics. I've had a peek under the hood so to speak and frankly Im surprised how shoddy the factory tunes really are. Ford has over-engineered the car to make thousands of decisions over a millisecond as to what timing table it wants to use and how much of it. Its quite baffling how complicated they made this car's calibration is comparison to GM LT cars and current gen Mopars. Coyote's are by far the most complicated to tune compared to the others.

But yes with a good tuner, who is responsive and has good customer service, a tune is a great thing for these cars to correct and adjust all the strange calibration decisions Ford made.

ZX, Thank you for a reasoned and thorough response.

Clearly you’re at the head of the class on this stuff and know what you’re talking about and doing.

 

[GrayMater22]

Guys, straighten me out here If I’m wrong but I don’t think I’m far off. The title of this thread could almost be a tattoo.

Has anybody ever modified and/or tuned one of these cars and it didn’t result in some kind of problem down the road that required additional work or retuning to make it run right? It seems like virtually every time someone asks for help with CELs, codes, driveability, etc. it turns out their car has been jacked around with by some tuner who thought he could outsmart Ford engineers.

I mean let’s face it. Getting some extra ponies for not a lot of cash is really appealing, right up to FI. But is it worth creating an ongoing problem in a car that’s already a pretty strong runner and reliable?

Remember the old Popiel Showtime Oven where you could “set it and forget it”? If that applied to tuning a Coyote I’d be all over it, warranty be damned. But it seems like the complete opposite is true.

My tune is great, can’t imagine going back, the only problem I had was during the download process (due to a weak battery). There are a lot of really reputable tunes and tuners out there, it seems the morale of the story here is to ALWAYS use battery support when downloading your tune.​

 

[Cordero1]

Only when doing a full write.

Whos the tuner?

Definitely not me. Op's, idk.

Sponsored