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  1. #1
    Reverse Gear

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    Still occasional limp mode

    I'm still getting limp mode but it seems to be randomly, I can't always replicate it.

    Can anybody think of anything else I can check. I've replaced all the vacuum lines, including the one in the ecu, cleaned the vnt with mr muscle (twice) and checked all hoses for splits.

    The fault code I get is 000575 - intake manifold pressure 17-00 - Control Difference.

    I've measured block 3 on VCDS and the actual is usually lower than the specified is this normal? I did have oil in the pipe in the ecu so I sprayed the map sensor with wd40 but this doesn't seem to do alot. Is the map sensor likely to be faulty?

    Thanks

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  3. #2
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    I'd be using brake cleaner on the map sensor instead of coating it in a lubricant as it could give a false reading.

    What engine is it ?
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

  4. #3
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    Cheers bradderz, I'll give that a try tomorrow. It's a 1.9 tdi AFN

  5. #4
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    Have you tried blocking the egr valve off to rule that out aswel ??
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

  6. #5
    Reverse Gear

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    I haven't. Would that cause limp mode too?

  7. #6
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    It wouldn't run great put it that way !!

    EGR's are s*** they always f*** up and clog the engine intake full of S***
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

  8. #7
    3rd Gear

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    I had the same problem.
    Test it on VCDS Basic Setting, Block 11 and see if the actuator is moving up and down every 10 seconds. If it is, make sure it is moving all the way. Mine stuck slightly, after cleaning, at the extreme of travel. Another clean, whilst moving it with a GS sorted the problem. You feel the carbon crack inside, and the Mr Muscle can then dissolve the gunk.
    Once it is free, you should just be able to move it all the way with your finger.
    1999 A4 B5 1.9 TDi FWD Saloon, Green SOLD
    2000 A4 B5 2.5 TDi Quattro Avant, Maroon, 'Panzer' Plated (currently sporting wrecked engine - and gearbox )
    2000 A4 B5 2.5 TDi Quattro Saloon, Blue, 'Panzer' Plated, Cruise Control retrofitted, OEM 6 Disc Changer retrofitted
    2006 A6 Allroad 3.0 TDi Blue, awaiting stuff to be done!

  9. #8
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    Just a quick update to this, my fault code has now changed to: 00519 - Intake Manifold Pressure Sensor (G71) 28-00 Short to Plus. Is this the MAP sensor? And is it possible to get these changed on the 97 AFN engine when they are inside the ECU?

    Thanks

  10. #9
    Reverse Gear

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    Hi PaulF thank you for your reply, sorry I have only just seen it, I have mr muscled it twice without any noticeable effects. Cheers

  11. #10
    "Stick a V8 in it!"

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    Yeh thats the MAP sensor.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  12. #11
    Reverse Gear

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    Thought so, any ideas on how I can go about replacing it?

  13. #12
    Reverse Gear

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    I'm looking at getting another ECU from eBay to take the MAP sensor out of. Would the MAP from an ECU for an AHH engine work in my AFN? The part numbers are the same except mine has FL at the end compared to just F on the eBay one.

 

 

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