Lots of cranking to start
09-16-2010, 09:18 PM
#1
2nd Gear
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Lots of cranking to start
1987 924S
Car seems to run fine when running but if car is left to sit for a few days it does not want to start. It has always started so far but it can take up to 4 sessions of cranking for ~15 seconds each. It leads me to believe that it is losing fuel pressure and has to rebuild this pressure before it will start. Fuel pump was replaced last November. Any opinions on where I should start to fix this?
PS: So far if I run the car every day it does not seem to have this problem, only when it sits for a day or two.
Car seems to run fine when running but if car is left to sit for a few days it does not want to start. It has always started so far but it can take up to 4 sessions of cranking for ~15 seconds each. It leads me to believe that it is losing fuel pressure and has to rebuild this pressure before it will start. Fuel pump was replaced last November. Any opinions on where I should start to fix this?
PS: So far if I run the car every day it does not seem to have this problem, only when it sits for a day or two.
09-16-2010, 11:37 PM
#2
Three Wheelin'
Join Date: Jul 2009
Location: Hawkinsville / Perry, Georgia, RETIRED USAF GO BLUE
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Sounds as if the Fuel Pump Check Valve is stuck open. It is located on the Fuel Pump to Engine outflow side of Pump. You will need 3 ea crush washers if all you intend to do is clean the gummed up Valve. I replaced mine with a new one.
Cheers,
Larry
Cheers,
Larry
09-18-2010, 01:25 PM
#4
Measure fuel pressure and fuel perssure leakdown to know the truth about your suspicion.
Start here:
http://www.clarks-garage.com/
FPR is another source of fuel pressure leakdown, as are injectors.
Start here:
http://www.clarks-garage.com/
FPR is another source of fuel pressure leakdown, as are injectors.