High RPM high altitude drivability issue

[MrSir]

I was passing someone in third gear, WOT for like 10 full seconds, coming up through about 8000+ft ASL, at about 7200 rpm I noticed a small drop in power, followed by a flashing CEL. I flicked the car into neutral and blipped the throttle a few times to listen for anything unusual, and everything was fine. About 5 seconds later, the CEL went away and everything was back to normal. Has anyone else experienced this, and is there a confirmed fix?

Car is a stock late-2013 with 42k miles. It had the spring recall done at like 10k, several years ago. It has an injen evolution sealed cold air intake and muffler delete. Code wasn’t current, but it was a multicyl random misfire. FF data looked okay, air mass and IATs were both on the low side of normal for the conditions. The intake has never caused me any issues on my LTFTs either.

The rest of the drive was completely fine. Driving around the valley (1500-3000 feet) was also completely fine. I’ve experienced a loss in power at high altitudes in basically every car I’ve ever driven, but never had a misfire except during sudden changes in throttle input.

[Snake]

Originally Posted by MrSir

I was passing someone in third gear, WOT for like 10 full seconds, coming up through about 8000+ft ASL, at about 7200 rpm I noticed a small drop in power, followed by a flashing CEL. I flicked the car into neutral and blipped the throttle a few times to listen for anything unusual, and everything was fine. About 5 seconds later, the CEL went away and everything was back to normal. Has anyone else experienced this, and is there a confirmed fix?



Car is a stock late-2013 with 42k miles. It had the spring recall done at like 10k, several years ago. It has an injen evolution sealed cold air intake and muffler delete. Code wasn’t current, but it was a multicyl random misfire. FF data looked okay, air mass and IATs were both on the low side of normal for the conditions. The intake has never caused me any issues on my LTFTs either.



The rest of the drive was completely fine. Driving around the valley (1500-3000 feet) was also completely fine. I’ve experienced a loss in power at high altitudes in basically every car I’ve ever driven, but never had a misfire except during sudden changes in throttle input.

How much petroleum distillate in the receptical? (Or for the more American amongst us, how much gas in the tank?). Happened to me on a long high g corner at a race track once because I only had like a quarter of a tank left.

Sent from my CPH1979 using Tapatalk

[MrSir]

Originally Posted by Snake

How much petroleum distillate in the receptical? (Or for the more American amongst us, how much gas in the tank?). Happened to me on a long high g corner at a race track once because I only had like a quarter of a tank left.

Sent from my CPH1979 using Tapatalk

It was about 3/4 tank. I’m stating to think I hit the limit of the spark plugs heat range. I’m just gonna take it easy at high altitudes.

[humfrz]

Originally Posted by MrSir

I was passing someone in third gear, WOT for like 10 full seconds, coming up through about 8000+ft ASL, at about 7200 rpm I noticed a small drop in power, followed by a flashing CEL. I flicked the car into neutral and blipped the throttle a few times to listen for anything unusual, and everything was fine. About 5 seconds later, the CEL went away and everything was back to normal. Has anyone else experienced this, and is there a confirmed fix?

Car is a stock late-2013 with 42k miles. It had the spring recall done at like 10k, several years ago. It has an injen evolution sealed cold air intake and muffler delete. Code wasn’t current, but it was a multicyl random misfire. FF data looked okay, air mass and IATs were both on the low side of normal for the conditions. The intake has never caused me any issues on my LTFTs either.

The rest of the drive was completely fine. Driving around the valley (1500-3000 feet) was also completely fine. I’ve experienced a loss in power at high altitudes in basically every car I’ve ever driven, but never had a misfire except during sudden changes in throttle input.

Y yes, jest don't do that no more -

Seriously, I reckon the engine just hiccupped, I wouldn't worry about it.

[humfrz]

Originally Posted by MrSir

It was about 3/4 tank. I’m stating to think I hit the limit of the spark plugs heat range. I’m just gonna take it easy at high altitudes.

Yep, run that 4 banger up here, if you really want to hear it pant -

[MrSir]

Originally Posted by humfrz

Yep, run that 4 banger up here, if you really want to hear it pant -

The intake sure sounds good when you’re always floored. Lol

[humfrz]

Originally Posted by MrSir

The intake sure sounds good when you’re always floored. Lol

The intake was hard for me to hear when mrs humfrz kept screaming - "their ain't no guardrails - I'm gonna die in this dammed car" -

[soundman98]

Originally Posted by humfrz

Yep, run that 4 banger up here, if you really want to hear it pant -

Looks like a g rated version of a peep show

[humfrz]

Originally Posted by soundman98

Looks like a g rated version of a peep show

The damn shutter was sticking. Of course that HAD to happen while on vacation! -