Check engine light
Advanced
Joined: Jan 2019
Posts: 85
Likes: 13
From: Chandler, AZ
Take this at face value - I'm very new to Porsches - but if it did indeed sit for 3 years with old gas I'd start by looking at the fuel system. Injectors were a great start. At a minimum I'd run 2 tanks of techron fuel system cleaner through it. I'd also find out what in the system could gum up with old gas and replace those. Probably the fuel filter would be top of my list - not sure if that can be replaced independently from the low pressure fuel pump on these cars.
As I say, not a Porsche expert, but that's what I'd do for any car that was parked for that long.
As I say, not a Porsche expert, but that's what I'd do for any car that was parked for that long.
RL Community Team
Rennlist Member
Rennlist Member
Joined: Oct 2007
Posts: 28,609
Likes: 8,397
From: Clemson, SC
After a 3 year sit, that fuel should have been dumped and renewed before the car was ever started. In my 997, even non-stabilized fuel that is 3 months old has resulted in running issues - it all gets stabilized now since I don't know how long one of the cars may sit between drives. On my Cayenne build that took 18 months, we dumped the fuel before restarting it and replaced with fresh.
How much has the car been run since the plugs were changed. It's very possible that the old fuel has damaged the new plugs that were installed and they need to be replaced again. For sure also look for rodent damage to any wiring after a 3 year sit.
Mario, to your question to me about the plenum, it's a T shaped device with a single input and 2 outputs - one side going to bank 1 and the other to bank 2. If the crack is on the input side, then yes, you would have problems with both banks, but if the crack is on the output side to bank 2, then only issues on bank 2 could result. It's also possible that the intake manifold for bank 2 is leaking or is cracked - they look like metal, but they're painted plastic.
How much has the car been run since the plugs were changed. It's very possible that the old fuel has damaged the new plugs that were installed and they need to be replaced again. For sure also look for rodent damage to any wiring after a 3 year sit.
Mario, to your question to me about the plenum, it's a T shaped device with a single input and 2 outputs - one side going to bank 1 and the other to bank 2. If the crack is on the input side, then yes, you would have problems with both banks, but if the crack is on the output side to bank 2, then only issues on bank 2 could result. It's also possible that the intake manifold for bank 2 is leaking or is cracked - they look like metal, but they're painted plastic.
Nordschleife Master
Joined: May 2005
Posts: 7,326
Likes: 77
Just to confirm, the following have been replaced on bank 2?
- timing solenoid
- valve lift solenoid
How about the big vane type timing actuator on the intake cam (has to open the cam cover and remove the cam to replace). How about the intake valve lifters? Not saying those are your problems. Just checking...
- timing solenoid
- valve lift solenoid
How about the big vane type timing actuator on the intake cam (has to open the cam cover and remove the cam to replace). How about the intake valve lifters? Not saying those are your problems. Just checking...
