991.2 Base Carrera BOOST LEAK
10-26-2018, 01:29 PM
#16
Former Vendor
10-26-2018, 02:34 PM
#17
Race Director
Porsche NA has directly told me.....Its not the dealers decision...its Porsche North America's decision on warranty. They do go off the dealerships recommendations to a degree. Porsche NA will ask for ECU read outs when engine related issues are being addressed in the dealership service department.
10-26-2018, 02:36 PM
#18
Race Director
10-26-2018, 03:07 PM
#19
Instructor
First thing. Reset the DTCs. ( Even if there are none, this resets short term / long term trims ).
Depends on the software version of the AP. resetting the ECU with the AP does not reset the adaptions. Reset with a gerneric OBDII scan tool or a RossTech VCDS ( VAG COMM ).. or stop by a auto parts store, its free to use their scanner.
report back.
Ive had this happen a few times as we test hardware and revisions.
Depends on the software version of the AP. resetting the ECU with the AP does not reset the adaptions. Reset with a gerneric OBDII scan tool or a RossTech VCDS ( VAG COMM ).. or stop by a auto parts store, its free to use their scanner.
report back.
Ive had this happen a few times as we test hardware and revisions.
10-26-2018, 09:58 PM
#20
Yep exactly...Porsche will not warranty the engine, trans....if the car is tuned...ECU tampered with.
Porsche NA has directly told me.....Its not the dealers decision...its Porsche North America's decision on warranty. They do go off the dealerships recommendations to a degree. Porsche NA will ask for ECU read outs when engine related issues are being addressed in the dealership service department.
Porsche NA has directly told me.....Its not the dealers decision...its Porsche North America's decision on warranty. They do go off the dealerships recommendations to a degree. Porsche NA will ask for ECU read outs when engine related issues are being addressed in the dealership service department.
With boost leaks, it's important to get the problem fixed pronto. The reason being the engine invariably leans out as the ECU fails to adequately adjust. The cost of getting the leak chased down and fixed is negligible on a new car.
Another point to note: with the 992 Porsche have upped the compression ratio of the engine, added piezo fuel injection (improved knock threshold - timing advanced) to increase torque and HP. They have not dialled up boost and in fact in the base they have wound it down. There will be reasons for this.
11-20-2018, 07:06 AM
#21
Guys, so I uninstalled the AP, and brought the car to Porsche to diagnose. They said it was a faulty circuit in the DME and replaced it under warranty. BUT... I don’t think that was the issue, they knew it was reflashed and did not care, but I think their faulty circuit was just their scan tool showing the unlock... I still believe there is some sort of boost leak, or turbo/intercooler issue..
I decided to send the new ecu out to be unlocked again by Cobb. It is still acting the same and the issue still exists. I’m seeing roughly 14-15 psi max on stage 1 tune and roughly 11 psi max on stage 0. No abnormal noises, check engine lights and such. I’ve heard of these cars having wastegate issues but that’s not the case here, neither rods are stuck. Open to ideas..
I decided to send the new ecu out to be unlocked again by Cobb. It is still acting the same and the issue still exists. I’m seeing roughly 14-15 psi max on stage 1 tune and roughly 11 psi max on stage 0. No abnormal noises, check engine lights and such. I’ve heard of these cars having wastegate issues but that’s not the case here, neither rods are stuck. Open to ideas..
11-20-2018, 04:46 PM
#22
Instructor
Ryan,
The WG arms are known to stick. They have changed the protections around the bushing. ( Porsche )
You can check this by inspecting that the swing arms on the turbo move freely.
The WG arms are known to stick. They have changed the protections around the bushing. ( Porsche )
You can check this by inspecting that the swing arms on the turbo move freely.
11-20-2018, 07:48 PM
#23
Why don't you take the car back to Porsche and tell them you suspect there is problem with boost and see if they can find anything. Usually cars with a significant boost leak run rough - it's noticeable.
Better to get it checked and if there is a problem get it fixed.
Better to get it checked and if there is a problem get it fixed.
11-20-2018, 10:30 PM
#24
RL Community Team
Rennlist Member
Rennlist Member
Come on. You think a dealer has never fixed a modded car under warranty? They have, all the time. And many times knowingly.
There are are plenty of reasonable dealers. Plenty more unreasonable ones but a tune does not automatically equal no warranty.
There are are plenty of reasonable dealers. Plenty more unreasonable ones but a tune does not automatically equal no warranty.
11-20-2018, 10:46 PM
#25
No WG rod issue, a previous post stated it could be the BPV which I will search with a boroscope tomorrow. And yes, warranty wasn’t denied when they replaced the DME after knowing it was reflashed. There is decent dealerships out there, I truly believe it is a small boost leak, just can’t seem to find it yet... if I can’t find it this time around, it’s going back to the dealer again..