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Thread: Help!

  1. #1

    Help!

    So I was driving down the motorway earlier and all of a sudden the VX started to jerk and clonk as if there was a sudden loss of power and then lots of power quickly. I knocked it into neutral and she revved freely and seemed ok, so put her back into drive and there was a distinct lack of power. If I tried to accellerate hard she would do the jerking thing again. She seemed ok though if I sat at 60 without accelerating, so continued to my destination about 20 miles away.

    On the way home the jerking and loss of power seemed to come and go until eventually she died altogether - managed to coast to the side of the road and sat there scratching my head. Checked connections etc under the hood and all seemed ok. If I tried starting her she would start, run roughly if at all and then die. I walked a couple of hundred feet to see which mile marker I was at in order to call the recovery guys, but when I got back she started and idled fine. So I carried on my way, very tentatively. I got about 15 miles before she died again - just after I needed to accelerate, so that obviously starts the failure. After 10 minutes of intermittently trying to start her, she started ok again and I carried on. Got another 10 miles before it happened again.

    Finally managed to get home but my VX isn't a happy bunny

    So, firstly sorry for the long post, but has anyone got any ideas? My first thought because of the jerking and clonking was maybe the torque converter, but later on she fails to start, so don't think its that.

    Did notice if I stuck her in neutral and coasted it seemed as if drive wasn't disengaging, but I could be imagining it! The revs also didn't drop unless you revved her, but then she was ok. When running, idle is ok and not up and down.

    Any ideas????

    Thanks guys

    Nick
    [SIGPIC][/SIGPIC]
    1997 Vehicross with mods coming! --- 1995 Pajero with lots of mods!
    2000 Audi Allroad - Wife won't let me mod

    Owner of the Four Wheel Drive Club in the UK - pop in and say hi! Click pic for link.

  2. #2
    Member Since
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    Wrench

    When was the fuel filter last replaced?

  3. #3
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    I'd say to start with the easy stuff & work outward.

    Fuel filter
    Fuel Pressure Regulator
    Idle control
    Plugs
    Coil packs
    Timing belt tensioner

    A few things that come to mind.
    [SIGPIC][/SIGPIC]

    Put a smiley after you say that Bub.

  4. #4
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    Hi Nick, Looking at the weather today and the symptoms you are having it sounds like the MAF is or has gotten wet. Do you have a ‘cone’ air filter? If so the air flow sensor wire could be getting wet. It always gave those symptoms on the 300zx running an open filter in the wet. Also check the MAF electrical connectors too. Even if you have a stock intake it may be worth opening it up and checking the filter + MAF, at least it rules it out if you don’t find anything. DON’T go touching the wire sensor though as its fragile !!!
    Speed Thrills, Boredom Kills!!

  5. #5
    Thanks for the fast replies so far guys.

    I forgot to say earlier that when I accelerated, if it wasn't jerking it sounded like it was sort of pinking. This did start happening just after I filled up with fuel...

    Don't know if that helps?!?

    Nick

  6. #6
    Member Since
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    CR had a good call on cleaning the MAF. I think you should check that first although I'm suprised that it didn't throw a CEL if it's that.

  7. #7
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    Had a Toyota Celica yrs & yrs ago that acted just like this...was fuel filter, like dub mentioned.
    VX KAT
    ....the adventure BEGINS ANEW! ...2015......
    Remember that life is not measured in the breaths you take, but rather in the moments that take your breath away.

  8. #8
    Thanks guys 'n' gals I'll check them tomorrow.

    The Fuel filter hasn't been changed whilst I've had it and I've no idea how long, if ever, it was done before. Is it straightforward to change, and where is it?


    Nick

  9. #9
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    Not sure but I think it's in line with the gas tank.

    Should be passenger side ... about 1/2 way back. Someone who has actually changed theirs will have to chime in with more details.

    Tom

  10. #10
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    Quote Originally Posted by tom4bren View Post
    Not sure but I think it's in line with the gas tank.

    Should be passenger side ... about 1/2 way back. Someone who has actually changed theirs will have to chime in with more details.

    Tom
    Nick, I volunteer to walk under it for you, until I see what appears to be a fuel filter.
    ________
    Club Royal Condos
    Last edited by ORW VXr : 08/20/2011 at 10:12 PM

  11. #11
    Lol thanks Babe, you're a Doll!

  12. #12
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    One fuel filter coming right up
    Its near the axles link. just in under the chassis.
    Lol my fuel filter looks soo old ( will replace it sometime)

  13. #13
    Member Since
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    I replaced mine when I bought a bunch of Amsoil products recently. They seem to have excellent oil & filters so I thought why not go with their fuel filter too. Any opinions on brands?

  14. #14
    Member Since
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    Wrench

    Quote Originally Posted by alterastro View Post
    Thanks guys 'n' gals I'll check them tomorrow.

    The Fuel filter hasn't been changed whilst I've had it and I've no idea how long, if ever, it was done before. Is it straightforward to change, and where is it?
    Nick
    http://www.vehicross.info/forums/sho...ht=fuel+filter

    http://www.vehicross.info/forums/sho...ht=fuel+filter

    ...

  15. #15
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    Same thing happened to me and it was the Fuel Pressure Regulator and Idle control valve.

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