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Starting problem when warm
I've been having a problem recently.
When the car is cold it starts perfectly on the first or second key turn. After I drive it for a while and the engine warms up it has a serious problem starting. It takes 4 or 5 key turns to get it going. And I have to hold the key for several seconds. BTW there is no back firing or popping whatsoever. Anyone have any ideas about what is going on? Very strange . . . .
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Tom Hutchinson 80 Targa / 81 Coupe / 71 Targa (in Porsche heaven) My Garage Build: https://youtu.be/H0n_NwEQVbs "If one does not fail at times, then one has not challenged himself." Ferdinand Porsche |
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07-19-2008, 12:48 PM
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Born to Lose, Live to Win
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do a search for fuel accumulator. yours could be going bad
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1983 911sc 2025 Chevy Colorado ZR2 |
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07-19-2008, 06:10 PM
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sudo apt-get purge 930
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,838
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Quote:
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL*** "Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing" --clutch-monkey |
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07-19-2008, 06:26 PM
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The accumulator is only a couple years old. So I'll rule it out for the time being. How do I check the check valve?
Also, why would either of these thing only cause problems when the car is hot and not cold?
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Tom Hutchinson 80 Targa / 81 Coupe / 71 Targa (in Porsche heaven) My Garage Build: https://youtu.be/H0n_NwEQVbs "If one does not fail at times, then one has not challenged himself." Ferdinand Porsche |
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07-19-2008, 06:33 PM
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sudo apt-get purge 930
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,838
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The check valve or accumulator keep pressure up in the fuel lines after running the engine. If one of these fail you lose the liquid seal in the fuel lines and the engine heat "boils" the fuel into a vapor. This is called vapor lock. After the engine cools the fuel re-condenses and it's easier to start.
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL*** "Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing" --clutch-monkey |
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07-19-2008, 06:42 PM
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Thanks for the info. Is there anyway I can check the check valve without replacing the fuel pump?
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Tom Hutchinson 80 Targa / 81 Coupe / 71 Targa (in Porsche heaven) My Garage Build: https://youtu.be/H0n_NwEQVbs "If one does not fail at times, then one has not challenged himself." Ferdinand Porsche |
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07-19-2008, 07:04 PM
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Check Valve Check
Some fuel pumps have the check valve built in and others have an external check valve. You have to calmp the fuel line to the inlet side of the fuel pump, remove the fuel line. Next you need to remove the fuel line on the discharge side of the fuel pump. if you have an external check valve remove it - if not, then you have to remove the fuel pump paying attention to the + and - lines on the fuel pump.
To check both the external/fuel pump check valve, you can place a hose over the outlet side of the check and put some air pressure on it. If the pressure builds up (need only 10 psi or so) and holds then it's good Same with the check built into the fuel pump. If the check valve checks out ok then the fuel accumulator needs to be checked. Also, while you are at it, check the filter in the inlet side of the fuel pump. This has a tendency to clog up and will starve the fuel system. Steve A porsche does more then just go fast in a straight line. |
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07-20-2008, 03:28 PM
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Many thanks . . . Gandalf
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Tom Hutchinson 80 Targa / 81 Coupe / 71 Targa (in Porsche heaven) My Garage Build: https://youtu.be/H0n_NwEQVbs "If one does not fail at times, then one has not challenged himself." Ferdinand Porsche |
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07-20-2008, 06:26 PM
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Many thanks . . . Gandalf
__________________
Tom Hutchinson 80 Targa / 81 Coupe / 71 Targa (in Porsche heaven) My Garage Build: https://youtu.be/H0n_NwEQVbs "If one does not fail at times, then one has not challenged himself." Ferdinand Porsche |
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07-20-2008, 06:26 PM
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sudo apt-get purge 930
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,838
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He is known as Mithrandir in the South
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL*** "Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing" --clutch-monkey |
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07-20-2008, 06:32 PM
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Khamûl = Sauron's lieutenant = Shadow of the East = the Black Easterling
Just a bunch of middle earth nerds hanging out here I suppose.
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Tom Hutchinson 80 Targa / 81 Coupe / 71 Targa (in Porsche heaven) My Garage Build: https://youtu.be/H0n_NwEQVbs "If one does not fail at times, then one has not challenged himself." Ferdinand Porsche |
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07-20-2008, 06:48 PM
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sudo apt-get purge 930
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,838
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I thought of the wraiths every time I saw you post
__________________
Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL*** "Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing" --clutch-monkey |
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07-20-2008, 06:52 PM
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Porsche
1983 Porsche 911SC 3.0
1978 Porsche 911 Targa 3.0
