Car Problem Reports

Volvo S40 "Hard start" Due to Leaking Fuel Pressure Regulator

Volvo S40 Problem
30 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005, 2008

Average Mileage: 116,419 mi (35,000 mi - 220,000 mi)


The fuel pressure regulator can leak and cause a hard start condition, without any faults recorded in the engine computer.

  • bralan, , 80,811 mi

    Hard start due to leaking fuel pressure regulator. Misdiagnosed as starter problem.

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  • Paolandra, , 131,682 mi

    My wife hads trouble starting the car this morning. I tried when I got home it took some time but when I gave it some gas and had kept it cranking for a few extra seconds it started but wanted to die. Kept the idle at 1500-2000 for about 30 seconds then took it for a drive. Drove fine plenty of power and no hesitation. Gas milage has been normal I guess she has not complained. Could this be this similar problem with the fuel pressure regulator or something different.

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  • Visitor, , 85,000 mi

    The car would occaisionally stall when coming to a stop. Occaisionally would hesitate when going at a green light. Progressively taking longer to start; first it took half a second longer then it took a second longer than usual (noticeable to all in the car). Check the vacuum hose to the fuel pressure regulator to see if yours is cracked. If it is cracked and you find any fuel in there its the fuel pressure regulator. If there is no fuel, just replace the vaccum line. This is a common issue so you can search the enthusiast forums for details. Misdiagnosed as the fuel filter and changing it did help but did not solve it. Try fixing the vacuum line first as it's a lot cheaper than getting the entire fuel pressure regulator ($230 from Volvo). The entire replacement of the unit involved 1 bold and takes 10 minutes if you have no idea what you are doing.

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  • gghazarian, , 157,000 mi

    Cold morning car was turn over then stall. Tried several times same thing happened. Just recently replaced (within last 10K miles) spark plugs, fuel filter, ignition coils, and the idle air control. Also the car was not throwing any codes during this process.

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  • layifioren, , 110,000 mi

    It take a while to start when cold and one can small gas in the vehicle after it starts

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  • hack19, , 35,000 mi

    Same problem. Replaced fuel regulator. problem solved

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  • Visitor, , 105,000 mi

    my2002 Volvo will act like it want to start but it will idle back off it takes about 5 min to get it started. it may be low in oil will that have any thing to do with it.

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  • Visitor, , 176,600 mi

    Just bought an 04 Volvo S40 LSE. Have the same problem with taking a while to start-up. Brought it to Southwest Auto in Dallas who told me it was the fuel pressure regulator.

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  • Visitor, , 75,000 mi

    hard to start

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  • Visitor, , 140,000 mi

    hard starts, have to press gas pedal down to get it to start.

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