Flooded
12-08-2013 | 10:01 AM
#1
Thread Starter
Instructor
Joined: Jan 2012
Posts: 106
Likes: 0
From: Edgewater, MD
Flooded
I need a little help.
Two weeks ago I drove ten minutes to the bank, shut the car off, when I went to restart it, I flooded it. I did all the normal attempts to restart it. Pedal to the floor, pulled the fuse for the fuel pumps. After an hour of sitting and retrying, had the car towed home.
After sitting for two weeks, I have time to address the problem. Should I just attempt a restart as I normally would had this problem not happened? Pull the fuse and turn the motor over? Pull the plugs and dry them off? Restart with the pedal to the floor? Please advise....
A quick note: once the key is turned on (pre ignition), both fuel pumps start pumping. I can never be slow with starting the car.
For your amusement: when I went to start the car, a motorcycle was next to me and as I turned the key he started his bike. I assumed my car was running. But my set belt on, released the parking brake, put in reverse, gave it gas, and no movement. Probably ten seconds went by since I turned the key. WAY to much time with no ignition!
Two weeks ago I drove ten minutes to the bank, shut the car off, when I went to restart it, I flooded it. I did all the normal attempts to restart it. Pedal to the floor, pulled the fuse for the fuel pumps. After an hour of sitting and retrying, had the car towed home.
After sitting for two weeks, I have time to address the problem. Should I just attempt a restart as I normally would had this problem not happened? Pull the fuse and turn the motor over? Pull the plugs and dry them off? Restart with the pedal to the floor? Please advise....
A quick note: once the key is turned on (pre ignition), both fuel pumps start pumping. I can never be slow with starting the car.
For your amusement: when I went to start the car, a motorcycle was next to me and as I turned the key he started his bike. I assumed my car was running. But my set belt on, released the parking brake, put in reverse, gave it gas, and no movement. Probably ten seconds went by since I turned the key. WAY to much time with no ignition!
12-08-2013 | 10:35 AM
#2
Burning Brakes
Joined: Apr 2006
Posts: 1,118
Likes: 2
From: Central Washington State
Really the only way to flood these cars would be to have an ignition problem (as in no spark) and continue to crank the engine over for several seconds. I suspect that may be your issue.
Remember that with CIS fueling systems, even though your pumps are running with the key turned to the ON position there will be no fuel flowing to the injectors unless the fuel metering arm on the fuel head is deflected by air being drawn into the engine (as when cranking her over or engine running). If you just sit there with the pumps running and do not crank, it will not flow fuel to the injectors and will not flood your car.
Go here for "no start" diagnostics
http://forums.pelicanparts.com/911-9...snt-start.html
Remember that with CIS fueling systems, even though your pumps are running with the key turned to the ON position there will be no fuel flowing to the injectors unless the fuel metering arm on the fuel head is deflected by air being drawn into the engine (as when cranking her over or engine running). If you just sit there with the pumps running and do not crank, it will not flow fuel to the injectors and will not flood your car.
Go here for "no start" diagnostics
http://forums.pelicanparts.com/911-9...snt-start.html
12-08-2013 | 11:10 AM
#3
Thread Starter
Instructor
Joined: Jan 2012
Posts: 106
Likes: 0
From: Edgewater, MD
Mark, thanks for your reply. But I forgot to mention, my engine is highly modified by TPC racing in Laurel, MD. Besides other things a seventh injector was added. I'm current at 385 rwhp. The first thing I was told was about the start up procedure and the fuel pumps.
I've only had one other problem and that was with the fuel pump fuse and it over heating (corrosion issue). But since then, that's the first thing I check.
Being relatively new to the Porsche family, I don't want to head down the wrong path.
I've only had one other problem and that was with the fuel pump fuse and it over heating (corrosion issue). But since then, that's the first thing I check.
Being relatively new to the Porsche family, I don't want to head down the wrong path.
12-08-2013 | 08:14 PM
#5
Racer
Joined: Apr 2008
Posts: 261
Likes: 2
From: Seattle-ish
I had an injector go bad, and it would leak down after shut off, purging the stored fuel pressure straight into the manifold at the injector block.
Combine that with a hot engine & intake manifold, it would vaporize the leaked fuel and permeate the entire intake manifold with vaporized gas. The sucker would not even think about starting, unless I let it sit for close to an hour.
Had the injectors cleaned and a spray pattern check, have not had the problem since.
Mark
Combine that with a hot engine & intake manifold, it would vaporize the leaked fuel and permeate the entire intake manifold with vaporized gas. The sucker would not even think about starting, unless I let it sit for close to an hour.
Had the injectors cleaned and a spray pattern check, have not had the problem since.
Mark
