Something popped, car shut down doing 85, yikes! Cause?

[lswing]

So I'm going 75 in CC, see a older beamer approaching in my mirror, give it some gas with Cruise Control slider, accelerating and the POP, engine drops RPMs, no throttle, have to coast over to the shoulder. Idle is all screwed up around 1200, EPC and Traction light are on, throttle does not work at all. Turn off the car, restart, running in limp mode. Made it back home, shifting and throttle seemed a bit off, took it easy, here are my codes. Maybe some computer issue, or a hose popped off, can't see it? Thanks, scary, lucky I had a spot to pull over, big time WTF moment, off to the mechanic again...

Throttle body seems to be a common find when searching this issue...

17743 - Engine Torque Monitor 2
P1335 - 008 - Control Limit Exceeded - Intermittent

Address 03: ABS Brakes
1 Fault Found:
18256 - Please check DTC Memory of Engine Controller
P1848 - 35-10 - - Intermittent

[Brav]

Hose maybe.. did the brakes go hard at all? I can't imagine a huge pop sound from accel via the cruise control. Lumpy or high idle?

[MaxRS6]

Yikes- I have not had that experience..Good luck and hope it is an easy fix

[905084]

In CC, slow accel and then POP? Idle runs up and down a lot?

[TozoM8]

Intake hose popped. You have a major air leak.

[lswing]

Thanks, you guys are great! Cruise accelerates fast once into boost:) Pop wasn't too loud, the engine dying down felt bad! Had brakes, no throttle at all, coasted to the side. Idle was really jumpy between, 1000-1300, she was upset! Hose popped was my first thought, catastrophic how the car shut down though, should I report that to AOA?

Into the mechanic, my back is bad or I'd be in the engine...

[Bigglezworth]

Sounds like a vacuum leak.

[905084]

How does the beast make vacuum? Obviously not under boost. How does it store the vacuum?

[AUDI5000CSTQ]

On my 86 Audi 5000 CSTQ, with increased boost the Michelin man hose would pop underneath.
you would never see it, weakend by years of oil sitting in it.
I am sure the RS6 has somthing like it coming off the Turbo or IC.
Just my 2cents

[lswing]

Cool, hope to get in there tomorrow, 2 cents are more than none:)

I'm a bit shocked at how the car shutdown though, protecting it's engine at least...

I was about to drop that Beamer proper too!

[lswing]

Well i have been having random idle off just barely, fine now though, so not vaccum right. I keep reading about throttle body issues. Could the tb have got a bad signal from the cruise slider? Just pondering...

[TozoM8]

Vacuum leak after the MAF makes the mix way too lean. ECU will shut it down.

[lswing]

Vacuum leak after the MAF makes the mix way too lean. ECU will shut it down.

Thanks, will pursue that if hoses are intact...

[Brav]

Get the car in the air and pull the belly pan. Check the IC hoses. That's the most likely cause. Then check the diverter valves under the small engin cover from above.

[Amulet-S6]

I had the same scenario a couple years ago. Accelerating using the Cruise Control. All of a sudden no power and engine won't respond to the throttle. Turned off the car, restart and all ran smoothly, until I used the cruise control again. Mine was a brake peddle sensor. Audi master tech said it's a fairly common issue.

Jim

[Brav]

I had the same scenario a couple years ago. Accelerating using the Cruise Control. All of a sudden no power and engine won't respond to the throttle. Turned off the car, restart and all ran smoothly, until I used the cruise control again. Mine was a brake peddle sensor. Audi master tech said it's a fairly common issue.

Jim

Interesting - this would be a super easy and cheap fix!

[lswing]

Jim, interesting fix for you there, crazy when it happens eh?

Checked ic hoses and all visible vacuum lines, looked fine. Probably under the airbox, can't get in until Tuesday. We tapped a line in there to control the w/m spray, so that could be what popped, shall see next week. Will give it the smoke test if that's not the case, driving slow this week....

[MNRS6]

So I'm going 75 in CC, see a older beamer approaching in my mirror, give it some gas with Cruise Control slider, accelerating and the POP, engine drops RPMs, no throttle, have to coast over to the shoulder. Idle is all screwed up around 1200, EPC and Traction light are on, throttle does not work at all. Turn off the car, restart, running in limp mode. Made it back home, shifting and throttle seemed a bit off, took it easy, here are my codes. Maybe some computer issue, or a hose popped off, can't see it? Thanks, scary, lucky I had a spot to pull over, big time WTF moment, off to the mechanic again...

Throttle body seems to be a common find when searching this issue...

17743 - Engine Torque Monitor 2
P1335 - 008 - Control Limit Exceeded - Intermittent

Address 03: ABS Brakes
1 Fault Found:
18256 - Please check DTC Memory of Engine Controller
P1848 - 35-10 - - Intermittent

I had the exact same thing happen, accelerating under cruise, pop and shut down. I got the torque limit code as well as an over boost. I was getting a bad exhaust temp sensor, which I have yet to fix. I assume the temp sensor went out, allowed too much boost and the engine was protecting itself. I need to fix the temp sensor but seems to be running fine. Not much help but you are not alone.

[ThrillHouse]

*note to self, no Accel via cruise

Hopefully its an easy fix for ya

[lswing]

Greg, give it a shot, just make sure you've got space to pull over:) Crazy feeling to have the beast shutdown going 85:(

Your egt sensor might be acting up due to an air leak messing with the mixture, lean and hot.

My lambda's, all 4 have been acting up, we think its the air leak causing this.

[ttboost]

Not that this is likely the issue..but I've recently discovered that a bad EGT WILL put us in limp mode. I currently have an EGT code and go limp after 2 or 3 CEL's...

[MNRS6]

Not that this is likely the issue..but I've recently discovered that a bad EGT WILL put us in limp mode. I currently have an EGT code and go limp after 2 or 3 CEL's...

How do you know if you are in limp mode?

[Bigglezworth]

How do you know if you are in limp mode?Ford Escorts and Toyota Camry's clean your clock in a 0-60 sprint....

[mmaturo]

Ford Escorts and Toyota Camry's clean your clock in a 0-60 sprint....

Or my most embarrassing moment waaaaayyy back when...a Nissan Maxima. F me...I know it must have been all over the internet that he out ran me.

[lswing]

I've been driving with tail between legs all week...I'll be back next! I did a reset of codes, she feels strong under 3k still, does that get you out of limp mode, or do you have to do redneck reset?

Car drives fine with no codes the last 50 miles, but I haven't hit boost either, or just barely. If we don't find any vacuum leaks on Tuesday, I'll give her a go and see if all is fine without using the CC.

[lswing]

Smoke tested everything, not a vacuum or hose leak, small leaking starting on one of my stock IC's finally.

So.....this makes me think it's the brake pedal sensor as Jim mentioned. I'll look into pricing on that fix...

Runs great, just won't be accelerating with cruise anytime soon!