Question about 2003 Volvo S60
Hi this could be just the apposite of flooding, it could be lack of fuel, fuel starvation, although there could be numerous things to contribute to hard starting, i will name a few for you to check out, first start with the easy checks, plugs, what are they like is the spark good? you can test this by removing each plug in concession and turn the engine to see if it is a good strong blue-ish spark, next, leads and coil pack this may be reducing the spark for the plugs, you will find that out if you get a "slow" white spark from any of the plugs, next, fuel pump pressure, the only way you can get this checked is at a dealer or if you know someone with the measuring system for checking this, see if you are getting enough fuel and if they are opening at the correct time when the fuel is injected, next compression of bores, if you can get one, get the compression of each bore checked if there is allot of difference between each bore you may have valve or head problems and piston problems obviously this will be the worst scenario out of the many...hope this helps good luck
Posted on May 25, 2010
Long crank times like this are most often caused by a defective fuel pump pressure check valve, also called a bleed back valve, when this valve fails in the electric fuel pump it lets the fuel lines and the fuel filer drain back into the tank, when the car is restarted the air must be purged from the system, they only way this can occurr is by the opening and the closing of the fuel injectors, this causes long cranking times and multiple stalls before engine runs smooth, many people think the engine is engine is flooding but that is not the case, the amount of fuel present to maintain ignition is insufficient and builds up in the cylinder, so when the engine does start many times you see smoke come out like it is flooded, the fuel pump. Have a shop hook up a special fuel pressure test gauge and do a fuel pressure leak-down test to verify the problem.
Posted on May 25, 2010
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Posted on Jan 02, 2017
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