Question about 2001 BMW 5 Series

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I have a 2001 525i w/ 6 cyl. it wont start. put spark tester on each plug,they spark. put gas in it, have fuel coming out of fuel line (took filter off) when key is turned on. how can i test the filter? it has a vacum reg. inside it. i put new plugs in. i hear pump sounding...i'm lost. even i lite shot of starting fluid,wiont make it 'try' to start, just turns over...any help,ideas?? thanks.

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Ok on that model of bmw you need to change the mass air flow sensor it controlls the injectors that alow it gas i had the same issue with my old bmw

Posted on Dec 29, 2010

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Engine quit running. Will spin over but not start. Has 105000 miles on it. New fuel filter.

Make sure that you have enough gas in your car. This sounds like common sense but many people don't think to check this before wondering why their car won't start. Try to refill your tank when it is no less than one quarter full, or you risk getting stalled or stuck somewhere.

  • 2 Verify that the battery has a full charge. A battery with a low or partial charge can cause the engine to crank too slow preventing it from starting. Sometimes a jump will fix this problem, but if your battery is more than five years old you should consider replacing it, especially if winter is only a few months away.
  • 3 Check to see if your fuel pump is turning on. This can easily be done by putting your key in the ignition, turning it to the "on" position, and listening carefully with your ear pointed toward the back seat. If your fuel pump is working you will here an electric "whirring" noise for about 2 seconds every time you cycle the key on and off. If you hear nothing then your fuel pump is faulty or not getting any power.
  • 4 Find out if the engine is getting gas to it. Sometimes a plugged fuel filter or a problem with the fuel injectors can prevent the engine from getting any gasoline. To check this remove the air cleaner and smell inside the throttle body or air cleaner housing. If the engine is getting enough gas you should be able to sense a strong gasoline smell due to the amount of uncombusted fuel left inside the intake manifold.
  • 5 Determine whether the spark plugs are firing. If there is plenty of gas but no spark, the engine will crank but not start. Unplug one of the spark plug wires and plug in a spark tester. Have a friend get in the car and crank the engine while you watch to see if the spark tester illuminates. You can usually purchase a spark tester at an auto parts store for about ten dollars.
    Find the fuse box of your Ford F-150, located on the passenger side of the truck under the dashboard. Locate the fuel reset switch that is next to the fuse box with a red cap on top.

  • 2 Start the motor of your vehicle and then depress the red cap by hand at the top of the fuel reset switch to stop the flow of fuel to the engine. Once the engine dies, crank the motor a couple of times to drain all the fuel pressure from the line.
  • 3 Locate the fuel filter on the inside of the frame rail under the driver's side door. Notice the markings on the fuel filter and how it is pointing, so you can identify which way to install the new filter.
  • 4 Disconnect the metal retaining clip by hand from the front (engine) side of the fuel filter and move it out of the way. Compress the metal fitting that sits over the front of the fuel filter with a line-removal tool until the filter comes loose, then separate the line from the filter.
  • 5 Separate the rear of the fuel filter from the fuel line by carefully using the line-removal tool to compress the metal fitting until it come loose, then remove the filter from the line.
  • 6 Use a flat-head screwdriver to loosen the clamps holding the fuel filter in place. Slide the old filter out of the clamps and discard the filter.
  • 7 Slide the new filter into the clamps with the arrows on the filter pointing toward the engine and tighten the clamp with a screwdriver. Connect the front fuel line to the front of the fuel filter by sliding the compression ring back and placing the line over the filter until the ring snaps into place, then move the locking clip into place.
  • 8 Connect the fuel line that runs to the fuel tank by pulling back on the compression ring and sliding the fuel line over the filter until the ring snaps into place, then move the blue locking clip in place over the line.
  • 9 Check all your connections to verify that they are set right and then depress the red fuel pump inertia switch. Turn the engine over by turning the key without starting the engine and counting to 10.
  • 10 Check the fuel line again to verify that there are no leaks. Start the motor and allow it to run until the idle smooths out.
  • Oct 16, 2011 | 2002 Ford F150 Regular Cab

    2 Answers

    My wont start ive tred almost everything 1999 pontiac montana 3.4 van i mistakenly put stp in the fuel tank a week ago and it trys to turn over but it just pop and gray smoke comes out the exshust pipe...

    try this, remove the spark plugs, then turn engine over a few times. if the stp is in the piston area it will force it out through the plug holes. put the plugs back in, then start it if it will. if still no start. system will need to be flushed out. especially the fuel tank.

    May 01, 2011 | Pontiac Montana Cars & Trucks

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    Started running bad suddenly. Had to feather the gas to keep it running and get home. Started it the next day and let it warm up for about 8 minutes. It died and won't start. Acts like it's not getting...

    Take out the spark plugs again, put a little bit of oil down each cylinder, see if that helps. If it does, you might get a compression tester to check to see if one of the cylinders has lost compression (EG, a head gasket blew, etc ...)

    Dec 31, 2010 | Mazda 626 Cars & Trucks

    2 Answers


    If by "bad gas" you mean dirty or wet (water or alcohol), the fuel filter and/or lines may be clogged or holding water...or the injectors could be clogged with dirt.

    Hearing the pump run doesn't mean that adequate pressure is reaching the engine...a fuel rail pressure tester will tell you if the pump and relay are doing their jobs properly.

    Test for spark to rule out ignition circuits and module...Lay one plug wire near a good ground and have someone turn the key for a couple of should see a long spark jump to ground.
    If no spark, the ignition module, distributor pickup, and crankshaft position sensor are the prime suspects.

    > As a test ONLY, I would back out a plug and spray a short-shot of starter fluid into the cylinder, replace the plug (quickly...starter fluid evaporates pretty fast) and give a crank.
    If it sputters, it's definitely in the fuel delivery...and I would start with a fuel filter.

    ***Don't forget to VOTE for the guys who take an interest in helping!

    Apr 27, 2010 | 2000 Chrysler Concorde

    1 Answer

    I have a 95 jaguar xj6, motor turns over but wont start. checked spark plugs and 3 of the 6 had oil in them. took cam cover off. cleaned and replaced gaskets, cleaned spark plugs, it turns over better but...

    I have had simmilar, is the fuel pump delivering fuel?
    Is the fuel filter clean?
    Are you getting a good spark on all of the plugs?
    Have you got good cyl compression?

    Mar 23, 2010 | 1995 Jaguar XJ6

    1 Answer

    V6 Misfire, very Wet plugs #3 and #2

    did you change plugs and leads?? doubt its fuel coming out exhaust as most exhausts on vehicles change the emissons to water in the exhaust thats why its wet

    Aug 11, 2008 | 1996 Isuzu Rodeo

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