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hughett's Avatar
 
Join Date: Jun 2002
Location: North Idaho
Posts: 162
Hard starting after 2 weeks..what gives?

My 928 will start IMMEDIATELY after a month of sitting....but the 968 is hard to start (almost doesn't) after two weeks...battery and spark are fine...just grinds and grinds...eventually catching. Ideas?

Harvey

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'94 968 Coupe, 6-speed
'88 928 S4, 5-speed
'85 928 S, 5-speed (Sold)
'02 Audi TT Turbo, 6 speed (Sold)
Old 07-02-2006, 05:59 AM
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Location: West Haven, Connecticut
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Bad starter? Have it tested.
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-2002.5 GTI VR6 24V 6SPD
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Old 07-02-2006, 06:12 AM
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SoCal Driver's Avatar
 
Join Date: Feb 2002
Location: Costa Mesa
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Check the fuel pressure.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 07-02-2006, 08:32 AM
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Join Date: Jun 2002
Location: North Idaho
Posts: 162
Starter cranks fine and fast....spark is there...but apparently, as SoCal Driver mentions..the fuel must not be arriving...as needed anyway. Is there some sort of fuel check valve that serves to keep the fuel lines full of gas..but if it goes bad, the fuel line drains dry while sitting? Requiring a lot of cranking to get the fuel to the engine after sitting?

When traveling, I like to carry some key spare parts and one is a fuel pump. I was thinking of getting a new pump anyway but didn't know what other associated parts I would need to replace while in there. Then keep the old pump for a spare...however, as SoCal suggests, I need to see if this FP has pressure. Not sure how to do that but I can do a search and find out. Thanks, guys. All ideas appreciated.

BTW, When I drive the car every day..no problems. on starting.

Harvey
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'94 968 Coupe, 6-speed
'88 928 S4, 5-speed
'85 928 S, 5-speed (Sold)
'02 Audi TT Turbo, 6 speed (Sold)
Old 07-03-2006, 02:16 PM
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SoCal Driver's Avatar
 
Join Date: Feb 2002
Location: Costa Mesa
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There is a check valve on the discharge side of the pump. You can also get a third party fitting for the front of the fuel rail that will accept a fuel pressure gauge or sender.

Other problems the later electronics have (944S and on) are the balasts for the injectors and the ignition module. Also a grounding problem that can fry the DME pcb at the cable connector.

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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 07-03-2006, 02:39 PM
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