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    Thread: Symptoms of a bad fuel filter?

    1. 08-11-2006 11:40 AM #1
      I need some help, my car has been steadily getting worse with it's hesitation and surging problems. Last night when I was driving it I was getting these problems at all RPMs and now that I think of it, it seemed to get worse when I'd go up hill. Does it sound like the fuel filter could be the problem? What typically are the signs of a bad fuel filter? Would a clogged filter get hot?

    2. Member needaveedub's Avatar
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      08-11-2006 11:48 AM #2
      im having the same exact problem as we speak
      at first it was intermittent, now its happening every time i drive, i put some fuel injector cleaner in and that helped a little
      fuel filter is one thing i have to check, but im thinking it might be some other things like, injectors, Fuel Pressure Regulator, knock sensor, or the CO pot, i also have my suspicions it may be the pump, but thats last
      if anyone else has had problems like this any help would be appreciated
      - Ben
      93 Corrado VR6
      99 A4 Avant 1.8T Quattro

    3. 08-11-2006 03:29 PM #3
      The filter is cheap, easy and should have been replaced by now. Do that first.

    4. Member RadoCC's Avatar
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      08-11-2006 06:46 PM #4
      if it's bucking, then i just overcame that problem. for me, it was a problem with the fuel pump relay.
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      08-11-2006 07:09 PM #5
      my car stalls intermittenly, sometimes without starting back up for a bit, my fuel filter looks old so im going to replace it anyways, but is there anything else that could cause this before i make 108708790 trips to the parts store?

    6. Member FlashRedRock's Avatar
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      08-12-2006 12:22 PM #6
      I had this problem when I first got the car. Fuel pressure regulator did it. But if you cannot remember the last time you changed your fuel filter, you should probably do it now. VW puts the fuel filter in a very interesting location

    7. 08-12-2006 04:54 PM #7
      I had a similar fuel problem, about a year ago ...repair went: relay, filter, pump...pump did it.

    8. Member RadoCC's Avatar
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      08-12-2006 06:37 PM #8
      Quote, originally posted by ridefuel »
      I had a similar fuel problem, about a year ago ...repair went: relay, filter, pump...pump did it.

      Yup, like I said, replace the relay. I did the relay and filter. Car doesn't stall or buck anymore. But, the acceleration isn't all there. So, I'm gonna do the pump soon.
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    9. 08-12-2006 07:15 PM #9
      Where should one get the relay?

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      08-12-2006 07:34 PM #10
      Got mine from worldpac for $4.50 but you have to have an account. Pretty sure http://www.germanautoparts.com has them for under $10.

    11. 08-12-2006 07:36 PM #11
      thanks

    12. 08-13-2006 04:07 AM #12
      I've got a 93 vr6 new style interior. And when I start my car and drive sometimes it stalls with the clutch in and sometimes it jerks around. I've replaced the coil pack and it stopped for about 6 months or more. Does this mean I should check my fuel pump or relay or concentrate back on the coil pack?

    13. 08-13-2006 04:51 AM #13
      CLEAN THE MAF plug, I had this problem and when i unplugged the MAF there was all sorts of corrosion. After cleaning it with a toothbrush and some Coke (which works ) my problems were gone.
      Then I bought a tube of die electric auto grease and used that on the connection

      this is my response to the initial post, it just sounded alot like my problems and its what fixed it for me to clear that up.
      I did however start with fuel components first to find out it wasnt that


      Modified by albeevr6 at 4:53 AM 8-13-2006

    14. Member whoisitwho's Avatar
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      08-13-2006 11:07 PM #14
      the problem i have when theres about a quater tank left when i turn right real hard the cars bogs till it gets straight and then it gets going iam gonna do fuel filter to see if it helps (need to be done anyway) can anyone tell me how to change it as in do in need to pull a fuse or clamp fuel hose other wise i know how to do the rest remove clamp install new filter

    15. 08-13-2006 11:15 PM #15
      Quote, originally posted by whoisitwho »
      the problem i have when theres about a quater tank left when i turn right real hard the cars bogs till it gets straight and then it gets going iam gonna do fuel filter to see if it helps (need to be done anyway) can anyone tell me how to change it as in do in need to pull a fuse or clamp fuel hose other wise i know how to do the rest remove clamp install new filter

      this is most likely caused by a bad pick up tube ... the one that goes from the in-tank pump, that sits on the floor of the tank, to the top of the tank where it connects inside to the 90 degree connection. I had this problem on my old mk2, but those are rubber ours are plastic.

    16. Member whoisitwho's Avatar
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      08-13-2006 11:19 PM #16
      can you tell me what i need then? a whole new sender?

    17. Member CorradoFuhrer's Avatar
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      11-30-2009 05:01 PM #17
      im having this problem right now with my car. i don't know when the fuel filter was replaced, car has 145K on it. The motor has a grand or so.
      When im driving with more than a quarter tank. i don't notice any problems - but as soon as I get below like a quarter tank. The engine will hesitate real hard, as soon as I go to give it throttle it bucks unless im real easy on the throttle or at real high rpms.
      i'm going to do the fuel filter just given the mileage and if its never been done. But from what I have been searching is that the pick up tube tends to be the problem?
      Does this mean I have to buy a new pump? Do I have to drop the tank to access this tube?
      I'm more inclined to put in a walboro 255 high volume/output (powers my 347whp nitrous Lincoln just fine.
      I assume this is the standard street pump everyone uses. Guys do it in there hondas... is this pump easily work in our cars or what kind of performance fuel pumps are out there?
      i know the walboro runs about a hundred bucks
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    18. Member TheBurninator's Avatar
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      11-30-2009 05:11 PM #18
      I replace my fuel filters about once a year... It is a cheap replacement why wait on it.
      Quote Originally Posted by ein View Post
      * IMPORTANT* The English language is completely inadequate for describing how spectacularly stupid this thread is.

    19. Member CorradoFuhrer's Avatar
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      11-30-2009 05:59 PM #19
      yea looks easy enough to do under there. But i fear from my searching the pick up or something on the pump is probably the culprit from someone elses description of there problem, when it gets under a quarter thank theres pick up issues.
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    20. Member TheBurninator's Avatar
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      11-30-2009 06:01 PM #20
      Quote, originally posted by Corrado****** »
      yea looks easy enough to do under there. But i fear from my searching the pick up or something on the pump is probably the culprit from someone elses description of there problem, when it gets under a quarter thank theres pick up issues.

      You know you have 2 fuel pumps right? Sounds like you are starving the intank transfer pump
      Quote Originally Posted by ein View Post
      * IMPORTANT* The English language is completely inadequate for describing how spectacularly stupid this thread is.

    21. Member CorradoFuhrer's Avatar
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      11-30-2009 06:24 PM #21
      my cars a 91, doesn't it only have one intank pump? I was searching through german autoparts and i see the 90 has two but looked like the 91- had only one, and the early stuff they don't make anymore, ide have to upgrade to vdo and the level float for the pump vdo. its like a 400 dollar thing?
      ide somehow want to rig up a performance pump. 400 is a kick in the balls!


      Modified by Corrado****** at 11:37 PM 11-30-2009
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    22. Member TheBurninator's Avatar
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      11-30-2009 06:32 PM #22
      Quote, originally posted by Corrado****** »
      my cars a 91, doesn't it only have one intank pump? I was searching through german autoparts and i see the 90 has two but looked like the 91- had only one, and the early stuff they don't make anymore, ide have to upgrade to vdo and the level float for the pump vdo. its like a 400 dollar thing?
      ide somehow want to rig up a performance pump. 400 is a kick in the balls!

      Oh then you have a vr6 style pump... If you go to a high flow pump like a walbro pump you cant get below a 1/4 of a tank
      Quote Originally Posted by ein View Post
      * IMPORTANT* The English language is completely inadequate for describing how spectacularly stupid this thread is.

    23. Member CorradoFuhrer's Avatar
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      11-30-2009 06:37 PM #23
      ok so wtf is going with my car then?
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    24. Member CorradoFuhrer's Avatar
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      11-30-2009 06:40 PM #24
      the car still runs it just hickups at low gas levels at low rpms right when you get on it
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      11-30-2009 06:41 PM #25
      My car is a 1993 SLC and When ever I make hard right turns with less then a 1/4 tank it bucks for a lil bit. ANd it also randomly bucks as well. I got my filters changed but did not fix it so Im gonna clean the MAF plug now and if that doesnt work fuel pump.
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