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Pxwguad

2010 Porsche Cayenne Base intermitent engine hesitation

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Hi Guys, I am a proud owner of a 2010 Porsche Cayenne Base model and I have been having a intermittent Engine hesitation issue. the following is a detailed issue of whats been happening, any suggestions that would help resolve this is appreciated.

 

About a month ago I was coming back from Roosevelt lake ,AZ which is about 3 hours from Tucson, it was a hot day 113deg, I was already in town and the gas gauge read about 1/8 of a tank and I was starting to move from a light when all of the sudden it felt like the engine stalled and came back on for a second then it did it again and my CEL came on.

 

I thought maybe my gauge was off and i was running out of fuel so i found the nearest gas station and filled up, I drove home and connected my car to my Icarsoft Computer and it was showing error P2293 Rail Pressure Control, I cleared the error and decided I would drive the car and see if it would happened again, Two months and hundreds of miles of mixed city and highway driving went by without a hitch.

 

Last week I had to go to LA so I packed up the car (4 passengers and luggage) and headed out. About two hours in on I8 right before Yuma it was 114 degrees outside and  I was cruising at about 85 MPH, the gas gauge read about 5/8 of a tank all oil and coolant temps were normal when all of the sudden the hesitation came back, it would run normal then hiccup then run normal, ect.. and the CEL came back on, this went on for about 20 minutes but I was still able to maintain 80-85 MPH.

 

After 20 minutes of this we decided to pull into a gas station and fill the tank with gas to see if anything would change and wouldn't you know that after filling up and setting off again over the mountain pass towards San Diego the car ran without a hitch, we averaged 77 MPH all the way to LA, but we would stop to fill up whenever the gauge read 5/8. after a couple of hours the CEL turned off on its own.

 

On our way back to Tucson we decided to fill up in San Diego and not fill up until it started to act up, and to my surprise the car once more ran flawlessly.

 

We didn't fill up until the gas low warning chime came on in Marana, AZ. The highest temperature this day was 104 deg. We filled the tank and made it home without incident. The next day I connected my car to my Icarsoft computer and it was showing the following error codes: P2293 Rail Pressure control, P0300 Random/multiple cylinder misfire detected, P0301 cylinder 1 misfire detected, P0303 cylinder 3 misfire detected.

 

Could this be ambient temperature related? Vapor lock at high ambient temps? If it was the fuel pumps you think it would have failed again on the way back, right?

This has to be happening to other people with 2007-2010 Cayenne Base models. Any input will help.

 

Thanks in Advance.

 

Sincerely;

Paul

Edited by Pxwguad
Spaced it out more for better reading

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