Volks AutosSky Insurance
Results 1 to 40 of 40
  1. #1
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493

    Whats causing my car to hesitate ??

    When you are an open road and put your foot down through the gears its fine but in traffic or putting your foot down from a low speed it seems to hesitate and jerk slightly but once the revs are up its fine. Its had new plugs and air filter recently ,ive checked the plugs and they are the right colour. Any idea's ??
    A4 Avant 1.8T Sport (183 bhp).

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    Markey's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Apr 2004
    Location
    KENT
    Posts
    2,143
    Clean MAF ? is it DBW ? as somtimes the position sensor and throttle can do with some cleaning as the constent opening and closing does not register because its all gunked up.
    A4 Avant project now started ! see this thread ! http://www.audi-sport.net/vb/a4-s4-forum-b5-chassis/43296-bit-project-going.html
    If you think my post had a usefull purpose please say thanks

  4. #3
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    Cleaning the maf sound like a good start ,where abouts is it as i had a quick look last night and couldnt see anything ,what dbw mean ??
    A4 Avant 1.8T Sport (183 bhp).

  5. #4
    Turbo Lag FTW's Avatar
    Hate those none insured you know who types

    Status
    Offline
    Join Date
    Feb 2007
    Location
    Carlisle, Cumbria. Not Geordie nor Scotch!
    Posts
    233
    Quote Originally Posted by 951
    Cleaning the maf sound like a good start ,where abouts is it as i had a quick look last night and couldnt see anything ,what dbw mean ??
    DBW = Drive By Wire throttle, I think taking the throttle intake pipe off and an inspection is what he means when its gunked up.
    Audi A4 1.8T Sport

  6. #5
    truebrummie's Avatar
    Neutral

    Status
    Offline
    Join Date
    Mar 2007
    Location
    birmingham
    Posts
    41
    do you get any smoke

  7. #6
    Markey's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Apr 2004
    Location
    KENT
    Posts
    2,143
    Quote Originally Posted by 951
    Cleaning the maf sound like a good start ,where abouts is it as i had a quick look last night and couldnt see anything ,what dbw mean ??
    Quote Originally Posted by Turbo_Lag_FTW
    DBW = Drive By Wire throttle, I think taking the throttle intake pipe off and an inspection is what he means when its gunked up.
    Yeah DBW Drive By Wire as said above means there is no throttle cable, its all electronicly controlled. In the case of the controller there is a little plate that the sensrors move accross if this is gunked up can somtimes do with a clean to help the contacts make better.

    The MAF is located within the airbox and looks very simolar to this.



    The intake hose that goes to the turbo is connected to one side of it.
    A4 Avant project now started ! see this thread ! http://www.audi-sport.net/vb/showthread.php?t=43296
    If you think my post had a usefull purpose please say thanks

  8. #7
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    Thanks for the info,i think mine has a cable on the throttle body though ??,i will have a go tomorrow once i get the suspension arms sorted !!
    A4 Avant 1.8T Sport (183 bhp).

  9. #8
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Swansea, South Wales
    Posts
    528
    Mine was suffering the same. Called a green flag due out. 25 quid told me my maf was shagged. GSF sold them for 70 quid for an s4, with the old one in return.

    changed it myself piece of piss.

    sorted out the problems.
    1999 S4, MIJ Performance exhaust with 100 cell cats

  10. #9
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    Tried cleaning mine and one of the sensor prongs snapped so now the car wont run at all,euro car parts are quoting £65 exchange for one !!
    A4 Avant 1.8T Sport (183 bhp).

  11. #10
    stapo69's Avatar
    All hail the mighty quattro!

    Status
    Offline
    Join Date
    Mar 2007
    Posts
    966
    Just relaced MAF on mine, cost £95 exchange from Audi so prob not a bad price from eurocarparts really.
    MRC-Powerflex-Hotchkis-Porsche-Compomtive-Vredestein-034-JHM-Apikol-EBC-FK-Labree-Vibrant-Recaro

  12. #11
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    It worked out at £75 inc vat and it probably the same as the audi one anyway(had the same part numbers) .Trouble is the car is still hesitating and jumping as before . Any idea's what to look at next to sort it ??
    A4 Avant 1.8T Sport (183 bhp).

  13. #12
    stapo69's Avatar
    All hail the mighty quattro!

    Status
    Offline
    Join Date
    Mar 2007
    Posts
    966
    I just replaced exhaust gas temperature sensors and lambda probe on my S4, made a huge difference, the car ran so much better afterwards, not sure on yours though, plugs? I dunno. Maybe worth getting it plugged into vagcom or getting diagnostics check from Audi or somewhere that can plug the car in, thats how I found my faults, might cost you a few quid but maybe save you some pennies in the long run rather than just replacing parts and hoping.
    MRC-Powerflex-Hotchkis-Porsche-Compomtive-Vredestein-034-JHM-Apikol-EBC-FK-Labree-Vibrant-Recaro

  14. #13
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    The garage down the road has the diagnostics so i think i will go and see them as like you say it will be cheaper in the long run !!
    A4 Avant 1.8T Sport (183 bhp).

  15. #14
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Swansea, South Wales
    Posts
    528
    The green flag dude who came out to me had a van full of stuff. connected most of it to the car and found the problem asap.

    I know he was no specialist, but he did have a moustache, which goes a long way in my book.

    p.s. I am on the vino again!!!
    1999 S4, MIJ Performance exhaust with 100 cell cats

  16. #15
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    The garage has told me the ECT needs replacing,does this sound right for the symptons and any idea's how much from the dealers ??
    A4 Avant 1.8T Sport (183 bhp).

  17. #16
    Markey's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Apr 2004
    Location
    KENT
    Posts
    2,143
    If by the ECT they mean the engine coolant temperature sensor then i replaced mine as it failed but all it affected was the temp gauage it was less than a score.

    http://www.audiworld.com/tech/eng47.shtml
    A4 Avant project now started ! see this thread ! http://www.audi-sport.net/vb/showthread.php?t=43296
    If you think my post had a usefull purpose please say thanks

  18. #17
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    The guy at the garage still says i need to replace the Ect but since i have replaced the maf do i need to plug it into the diagnostics to reset anything ??.
    A4 Avant 1.8T Sport (183 bhp).

  19. #18
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    My car is still not running right,so far ive changed the plugs,ect sensor,maf and the diverter valve and its still not right but does feel slightly better. Any idea's what else it could be,as if i can't get it fixed soon the car is going the journey as im just getting sick of it now !!!
    Last edited by 951; 12th February 2008 at 08:30.
    A4 Avant 1.8T Sport (183 bhp).

  20. #19
    Soupie69uk's Avatar
    Owner

    Status
    Offline
    Join Date
    Mar 2004
    Location
    Edinburgh, Scotland
    Posts
    2,752
    Did you check all your boost hoses?

    Could be a kink in one.
    A4 1.8T Quattro

  21. #20
    Broken Byzan's Avatar
    Photographic Moderator

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Cardiff, United Kingdom
    Posts
    12,523

    My Social Networking

    Follow Broken Byzan On Twitter Add Broken Byzan on Facebook Add Broken Byzan on Google+ Visit Broken Byzan's Youtube Channel
    Was it a genuine MAF? As i went thru 3 before i found one that worked. And that was a genuine one

  22. #21
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    The boost hoses looked ok from what i could see,the maf was from euro car parts not from an audi dealer but is a genuine bosch unit !!
    A4 Avant 1.8T Sport (183 bhp).

  23. #22
    macca's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Sep 2006
    Location
    Sussex.
    Posts
    525
    is everything standard? have you replaced dump valve or air filter with something else?
    1998 A4 1.8T Sport - For Saturdays
    2003 VW Golf MKIV R32 - For Sundays
    2000 Peugeot 406 HDi - For when it's raining
    1996 Kawasaki ZX7R - For when I'm late for work!

    Mods- Forge Dump Valve, The Engine Shop Power Plus based Engine (Low Comp. Forged pistons, Arrow H-Section Rods, Newman fast road cams, polished & ported head), 19" wheels, B&M Short Shifter, Greddy Turbo Timer, RS4 Grill, Weitec GTN coilovers, HKS modified air filter, Autobahn88 FMIC, ChippedUK custom map. Some Turbo mods ongoing.

  24. #23
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    The car had a superchip fitted years ago before i bought it and was running fine for about the first 6 months of my ownership. The only things i have changed are just the standard parts to try to fix it !!.
    A4 Avant 1.8T Sport (183 bhp).

  25. #24
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    I was driving the car yesterday without the radio on and the window down and i noticed when changing gear im getting a ppsstt noise which sounds like an atmospheric dump valve (but quieter) is this normall or a boost leak ??
    A4 Avant 1.8T Sport (183 bhp).

  26. #25
    Markey's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Apr 2004
    Location
    KENT
    Posts
    2,143
    depending on boost you can hear the normal recirc valve which makes the exact same noise. I would expect you to hear a normal atmos dump valve if the windows were up or down. A boost leak would be more notiable when you put your foot down and you notice a lot less power than normal.
    Have a loook at the dump valve it might be a half and half one with the setting turned down to only dump a little to the atmos.
    A4 Avant project now started ! see this thread ! http://www.audi-sport.net/vb/showthread.php?t=43296
    If you think my post had a usefull purpose please say thanks

  27. #26
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    The dump valve is jsut a standard plastic recirc type with no adjustment,the car sometimes lacks a bit of power but most of the time is fine,its just when you put your foot down usually in 2/3rd gear but sometimes on all it hesitates.
    A4 Avant 1.8T Sport (183 bhp).

  28. #27
    Markey's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Apr 2004
    Location
    KENT
    Posts
    2,143
    Mine does that for a split second then carries on going i put mine down to the MAF
    A4 Avant project now started ! see this thread ! http://www.audi-sport.net/vb/showthread.php?t=43296
    If you think my post had a usefull purpose please say thanks

  29. #28
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    To be honest i expected it to be the maf but i have replaced it with a brand new genuine bosch unit ,but i suppose it could be faulty. Also there is no fault codes showing up either.What about the coil packs or injectors ??
    A4 Avant 1.8T Sport (183 bhp).

  30. #29
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    I spoke to a mechanic today and he suggested the wastegate could be at fault ,does this sound like it could cause the problems ??
    A4 Avant 1.8T Sport (183 bhp).

  31. #30
    g60leigh's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Stockton on Tees
    Posts
    1,391
    i had similar problem that was cured when i had the actuator on the turbo replaced.

    2001 S3 (AMK)
    AEM WMI Kit, Black Silicone Hoses, Badger5 TIP with Cone Filter, AH Fabrications FMIC, Relentless Manifold Downpipe & Sport Cat, Miltek Cat Back Exhaust, VAG Aero Wipers, Forge FMDV008 Re-Circ, Revo Stage 2 Remap with SPS+ Tweaks, 2.0 TFSI Coil Pack Mod, B&M Short Shift, RNS-D Retrofit, Brembo & B5 2 Piece Rotor Conversion

  32. #31
    Broken Byzan's Avatar
    Photographic Moderator

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Cardiff, United Kingdom
    Posts
    12,523

    My Social Networking

    Follow Broken Byzan On Twitter Add Broken Byzan on Facebook Add Broken Byzan on Google+ Visit Broken Byzan's Youtube Channel
    is the waste gate rattling?? thats what they usually do when they fail

  33. #32
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    Quote Originally Posted by Byzan A4
    is the waste gate rattling?? thats what they usually do when they fail
    No, not that i can hear !!
    A4 Avant 1.8T Sport (183 bhp).

  34. #33
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    If you for example put you foot down at 60 in fifth gear the car picks up no problem but if you let you foot back off the gas then it jerks and judders,i think is looking like something turbo related ??
    A4 Avant 1.8T Sport (183 bhp).

  35. #34
    g60leigh's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Stockton on Tees
    Posts
    1,391
    Quote Originally Posted by 951
    If you for example put you foot down at 60 in fifth gear the car picks up no problem but if you let you foot back off the gas then it jerks and judders,i think is looking like something turbo related ??
    I had the same thing before replacing the actuator. the one on mine was coroded up.

    2001 S3 (AMK)
    AEM WMI Kit, Black Silicone Hoses, Badger5 TIP with Cone Filter, AH Fabrications FMIC, Relentless Manifold Downpipe & Sport Cat, Miltek Cat Back Exhaust, VAG Aero Wipers, Forge FMDV008 Re-Circ, Revo Stage 2 Remap with SPS+ Tweaks, 2.0 TFSI Coil Pack Mod, B&M Short Shift, RNS-D Retrofit, Brembo & B5 2 Piece Rotor Conversion

  36. #35
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    How much is a new one going to cost ??
    A4 Avant 1.8T Sport (183 bhp).

  37. #36
    g60leigh's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Stockton on Tees
    Posts
    1,391
    forge do an uprated one, but I believe they are a real pig to set up

    2001 S3 (AMK)
    AEM WMI Kit, Black Silicone Hoses, Badger5 TIP with Cone Filter, AH Fabrications FMIC, Relentless Manifold Downpipe & Sport Cat, Miltek Cat Back Exhaust, VAG Aero Wipers, Forge FMDV008 Re-Circ, Revo Stage 2 Remap with SPS+ Tweaks, 2.0 TFSI Coil Pack Mod, B&M Short Shift, RNS-D Retrofit, Brembo & B5 2 Piece Rotor Conversion

  38. #37
    Reverse Gear

    Status
    Offline
    Join Date
    Nov 2006
    Posts
    19
    I had the same problem, hesitation on part throttle acceleration...changed (supposedly long life) fuel filter, presto! Problem solved!

  39. #38
    Bushen's Avatar
    Driving with style

    Status
    Offline
    Join Date
    Oct 2007
    Location
    Taunton
    Posts
    52
    I had a similar problem where my car was hesitating aswell and i changed the Maf, the spark plugs, the h.t leads and that helped a little bit, but the problem was resolved when i changed the coil pack, dont know if its the same for your case but maybe its worth a go.

  40. #39
    951
    951's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Feb 2007
    Location
    North east
    Posts
    493
    I ve changed the fuel filter which made no difference,i think its either down to the actuator or the coil packs like you say. Anyone know if the 1.8 n/a uses the same coil packs as i knoiw where there is some that i can borrow !!
    A4 Avant 1.8T Sport (183 bhp).

  41. #40
    Broken Byzan's Avatar
    Photographic Moderator

    Status
    Offline
    Join Date
    Apr 2004
    Location
    Cardiff, United Kingdom
    Posts
    12,523

    My Social Networking

    Follow Broken Byzan On Twitter Add Broken Byzan on Facebook Add Broken Byzan on Google+ Visit Broken Byzan's Youtube Channel
    Sadly The NA one s are different

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO