Hey all,
not sure if this is the right place to post this but I am having a strange issue.
Last week I had to take my car to the dealer because it was stumbling and stalling. They diagnosed and replaced "Low side Fuel Pressure Sensor and Purge Valve". I also see "Recal PCM" on the report.
After picking up the car, I noticed the wrench indicator was on the dash, but the car ran well and the problem was fixed. In fact the car felt extra strong, and very willing to rev and seemed to have more power.
I have a Cobb Stage 3 setup and was running the 93 Octane tune, and I had not reverted to factory tune or uninstalled the AccessPort before taking the car to dealer. I was very happy with how the car was running and thought it was running better because of the fuel sensor and purge valve repair, but I was concerned why the wrench indicator remained on.
In an attempt to diagnose the wrench, I connected my AP and pulled the codes. I saw lots of active codes for fuel system issues( P0087, P008B, P018C, P0456, P1450,, and P2610) and thought these were from before the repair so I cleared code and also cleared learning. The wrench did not go away, but the codes cleared and did not come back.
However, after doing this, the car no longer ran as strong as it did when I first got it from the dealer. In fact, very soon after that the MPG reported had dropped from ~28 mpg which was where it was when I got the car back from the dealer to ~22mpg which was what I was normally getting with the Stg3 93 Octane Cobb tune. I flashed the Stg 0 tune and saw worse perf and similar MPG numbers. I flashed back to Stg 3 93 octane but still havent replicated how strong the car felt when I got it back from dealer. I smells like the car is running richer on the Cobb Stg 3 93Octane tune than whatever the dealer had changed.
Bottom line is I dont know what the dealer did to the PCM, but the car felt great and by clearing and reflashing the CObb tune I have lost those improvements. I want to understand what the dealer could have done and why it felt so much better than the Cobb tune. I will post readings from my AP guages and logging later.
not sure if this is the right place to post this but I am having a strange issue.
Last week I had to take my car to the dealer because it was stumbling and stalling. They diagnosed and replaced "Low side Fuel Pressure Sensor and Purge Valve". I also see "Recal PCM" on the report.
After picking up the car, I noticed the wrench indicator was on the dash, but the car ran well and the problem was fixed. In fact the car felt extra strong, and very willing to rev and seemed to have more power.
I have a Cobb Stage 3 setup and was running the 93 Octane tune, and I had not reverted to factory tune or uninstalled the AccessPort before taking the car to dealer. I was very happy with how the car was running and thought it was running better because of the fuel sensor and purge valve repair, but I was concerned why the wrench indicator remained on.
In an attempt to diagnose the wrench, I connected my AP and pulled the codes. I saw lots of active codes for fuel system issues( P0087, P008B, P018C, P0456, P1450,, and P2610) and thought these were from before the repair so I cleared code and also cleared learning. The wrench did not go away, but the codes cleared and did not come back.
However, after doing this, the car no longer ran as strong as it did when I first got it from the dealer. In fact, very soon after that the MPG reported had dropped from ~28 mpg which was where it was when I got the car back from the dealer to ~22mpg which was what I was normally getting with the Stg3 93 Octane Cobb tune. I flashed the Stg 0 tune and saw worse perf and similar MPG numbers. I flashed back to Stg 3 93 octane but still havent replicated how strong the car felt when I got it back from dealer. I smells like the car is running richer on the Cobb Stg 3 93Octane tune than whatever the dealer had changed.
Bottom line is I dont know what the dealer did to the PCM, but the car felt great and by clearing and reflashing the CObb tune I have lost those improvements. I want to understand what the dealer could have done and why it felt so much better than the Cobb tune. I will post readings from my AP guages and logging later.
