Limp Mode

[AllAboutViper]

2014 Viper SRT
Full Exhaust + HP Tuners

Car was running fine for one year, no codes, until i changed the Oil Pressure Sender because the gauge was Showing Zero,

Since then everything is fine, until yesterday when i took the car to the track, i Filled half of the tank with VP MS109 Race Gas (Because my car was tuned at 97OCT and now the Octane was downgraded in our Country to 95) so i wanted to be in the safe side avoiding knock because of the lower fuel octane,

One of the runs, i was at 4th gear, 4500RPM, the car went to limp mode, check engine light was blinking, no codes at all, turned the car off,On then everything is normal, and after a few runs, again Limp mode,

is it possible that it is caused by the MS109? This never happened using Octane boosters,

Checked the dash screen again, no codes at all, the car is only 8000 Miles

Thanks

[Steve M]

What type of limp mode? The spitting sputtering type, or the softer, won't let you go over 2,000 RPMs type?

Still using the stock air box?

[AllAboutViper]

Yes it is the spitting sputtering one, Stock air box,
I didn't try to go above 2000RPM, when it happened, pressed the clutch and parked turned off the car, but i tried to rev it in neutral before turning off, the response is heavy and as you said "spitting and sputtering"

[Steve M]

Were the throttle response tables altered in the file you are currently running?

[Jack B]

Use a scan tool, it will give you the code. The dash codes are limited.

[mjorgensen]

2014 cars had a PCM update for this issue, you will need to get an update somehow. The HP Tuners will not affect this needed update so without it may be hard to remedy. Also with the use of HP Tuners you cannot get back into the PCM at a dealer because the internal part number is changed by the HPT... You may need a new updated PCM to start with and then redo the HPT if you cannot figure something out with the tune.

[AllAboutViper]

Thanks all for responding,

But i took the car to the track multiple times before the VP MS109, raced alot, no Limp mode at all!!!
Thats why i'm asking if it's possible to be from the Race Gas

[Arizona Vipers]

Thanks all for responding,

But i took the car to the track multiple times before the VP MS109, raced alot, no Limp mode at all!!!
Thats why i'm asking if it's possible to be from the Race Gas

I've run 101 (Same octane as what you're running) on two Gen 5's with various Arrow computers etc and have never had that happen. I think you are going to have to do what Mark said above.