New problem - Takes two attempts with the key to start.
#16
Rennlist Member
2 tries to start.
the 964 fuel pump does not prime on initial turn of the key like the earlier cars do. someone correct me if i'm wrong. our 964 fuel pums are commanded to come on when the flywheel speed sensor picks up a rated speed. your flywheel sensor might be the cause. but before you go replacing that you need to verify that your fuel pump check valve is functioning. you check fuel pressure running, and then verify the decay rate is within specs, ( example 50 psi for 20 miniutes with car off ) if the decay rate fails then its your fuel pump check valve that is replaceable on the pump itself.
#18
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Join Date: Jun 2005
Location: Chicago
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#20
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fuel pressure gauge
I bought this from these guys, fits perfectly to our fuel rail and good deal.
http://www.arnnworx.com/catalog/inde...0#.VWdb7krD_cs
http://www.arnnworx.com/catalog/inde...0#.VWdb7krD_cs
#22
Racer
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Join Date: May 2011
Location: Minneapolis MN.
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Gents,
Thanks a lot for all of your great responses. Its going to take me a little time to go through them and try some diagnostics. But I really appreciate you guys throwing your experiences out there with this issue. On a side note I have always had to feather the gas peddle at take off when the clutch is released or the car dies due to the idle dropping (hot and cold) I do not believe I have a LWFW. The idle is good when the clutch depressed. Changing through the gears at speed the idle is not an issue.
Thanks a lot for all of your great responses. Its going to take me a little time to go through them and try some diagnostics. But I really appreciate you guys throwing your experiences out there with this issue. On a side note I have always had to feather the gas peddle at take off when the clutch is released or the car dies due to the idle dropping (hot and cold) I do not believe I have a LWFW. The idle is good when the clutch depressed. Changing through the gears at speed the idle is not an issue.
#23
Gents,
Thanks a lot for all of your great responses. Its going to take me a little time to go through them and try some diagnostics. But I really appreciate you guys throwing your experiences out there with this issue. On a side note I have always had to feather the gas peddle at take off when the clutch is released or the car dies due to the idle dropping (hot and cold) I do not believe I have a LWFW. The idle is good when the clutch depressed. Changing through the gears at speed the idle is not an issue.
Thanks a lot for all of your great responses. Its going to take me a little time to go through them and try some diagnostics. But I really appreciate you guys throwing your experiences out there with this issue. On a side note I have always had to feather the gas peddle at take off when the clutch is released or the car dies due to the idle dropping (hot and cold) I do not believe I have a LWFW. The idle is good when the clutch depressed. Changing through the gears at speed the idle is not an issue.
#24
Drifting
On a side note I have always had to feather the gas peddle at take off when the clutch is released or the car dies due to the idle dropping (hot and cold) I do not believe I have a LWFW. The idle is good when the clutch depressed. Changing through the gears at speed the idle is not an issue.
#25
Racer
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Location: Minneapolis MN.
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Halv,
Thanks for the offer and Ill take you up on it if needed. We should get together anyway maybe C&C in Chan sometime this summer. I do have a scan tool and never really thought about doing an adaption. Will try that first.
Thanks for the offer and Ill take you up on it if needed. We should get together anyway maybe C&C in Chan sometime this summer. I do have a scan tool and never really thought about doing an adaption. Will try that first.
#26
Racer
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Laurent,
The FPR is something I am unfamiliar with but a good possibility its the culprit. I guess its time to search this site. Anybody have a thread with this repair? BTY you still in MN?
The FPR is something I am unfamiliar with but a good possibility its the culprit. I guess its time to search this site. Anybody have a thread with this repair? BTY you still in MN?
#27
I don't get down to C&C too often but I can try to make the next one. I'll be at the All Porsche Show in Roseville on the June 28, so maybe I'll see you there? How about you Laurent?
#28
Drifting
Also there is a 993 gathering in Long Lake on 6/9, right down the street from me. You guys are welcome to come to my home to shoot the **** and then we can crash their party.
#30
Rennlist Member
So I’ve had similar issues as above.
Earlier this year I changed the following:
distributor caps and rotors
spark plugs
spark plug wires
all of this started after completing that work and changing out the rubber boots on my intake plenum. Car won’t start cold the first try. Will catch on 2nd sometimes or 3rd for sure. No other issues while driving, will start on first try after the initial start. So I’m stumped!
I’ve recently cleaned out my ISV And it hasn’t solved it either.
I pulled the vacuum line from FPR, no leaks.
appreciate any help!
Earlier this year I changed the following:
distributor caps and rotors
spark plugs
spark plug wires
all of this started after completing that work and changing out the rubber boots on my intake plenum. Car won’t start cold the first try. Will catch on 2nd sometimes or 3rd for sure. No other issues while driving, will start on first try after the initial start. So I’m stumped!
I’ve recently cleaned out my ISV And it hasn’t solved it either.
I pulled the vacuum line from FPR, no leaks.
appreciate any help!