Hesitation, ticking, burning rubber smell, and knock

[Kilobyte]

And now a check engine light is on. I did 15 minutes of highway driving this morning. About 7 minutes in, at 77mph, the engine can't handle the slight grade on cruise control. The RPMs climb, but slow to accelerate. Then hesitation whenever pushing the gas pedal. It's like the engine can't decide which gear it wants to go to. When I exit the highway 8 minutes later the ticking is quite loud and still considerable hesitation up to 40mph. I get to my destination 5 minutes later, park the car, and can smell burning rubber. I check under the hood, no noticeable reason.

On the route home the ticking is still audible from inside the car and then the CEL goes on. The code is P0324 and 0325 knock sensor related basically. I have changed out the PCV a week ago to try and fix the ticking, but no joy. Was going to change out the spark plugs and coil pack next. Running premium gas right now, but I don't have high hopes. Everything is stock, I didn't know about tuning until I got onto this forum, lol.

We purchased the car in August with 64k miles. It still is under the 3k miles, 3 month extended warranty. Doesn't sound like replacing the knock sensor is under warranty, but I'm leaning towards lifters. This issue has been very intermittent since a week or two after we purchased, but now is happening more frequently.

Called the dealership and have an appointment on Monday. We'll see if the tech thinks it warrants an engine tear-down to figure it out more.

KB

 

[gnonne]

How much coolant is in the overflow/expansion tank?

Definitely sounds like it is running too hot, and these things are known for coolant leaks...

 

[Kilobyte]

Coolant level is at the line and I haven't seen a change. Had a fresh oil change at the dealership in August too.

I was taking some readings with my ODBII device when this happened, but I'm not well versed in what the parameters mean or what are/are not typical values.

KB

Sent from my SM-N960U1 using Tapatalk

 

[Kilobyte]

Of course, the CEL goes off on the way to the dealership. And she runs like a perfect little car...ugh.

If they can't get the CEL to go on after some freeway driving today, we'll leave the car overnight and have them try again tomorrow.

KB

Sent from my SM-N960U1 using Tapatalk

 

[Kilobyte]

Dealership found the upper timing chain guide was loose. Hopefully that's the only fix needed.

KB

Sent from my SM-N960U1 using Tapatalk

 

[gnonne]

That's an odd problem - definitely would cause lack of power and other issues if the engine was running out of timing... But, it is odd that the chain guide would come loose...

 

[Kilobyte]

Picked it up from the dealership last night. There's no hesitation and plenty of power to pass on the freeway. Also, there's no clicking sound anymore. So far so good.

KB

Sent from my SM-N960U1 using Tapatalk

 

[Maddmatts]

Glad to see it was an easy-ish fix. Thanks for letting us know the solution.

 

[Limo_89]

Hi i am glad i found your post since my car is having the same problems as yours did... was the repair successful and was the repair covered by the warranty?