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Thread: 5psi boost

  1. #1
    andybnwc's Avatar
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    5psi boost

    today on a trip to nottingham had normal boost but after a nice quick run i dropped to 5psi , tried turning off and on but nothing , hits 5psi dead not a spot over . Im gonna run vag on it in a min i suspect a egt . Where is the cheapest place now for egts?
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

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  3. #2
    "Stick a V8 in it!"

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    5psi is the actuators default pressure.

    Would imply the N75 valve, or the wiring to it, is dead.

    Or i guess perhaps the ecu having put the engine into limp mode, but i'd expect other signs of that such as lowered rev limit

    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


  4. #3
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    ok vaged it this is what i got.
    17963 - Charge Pressure: Maximum Limit Exceeded
    P1555 - 35-10 - - - Intermittent
    17579 - Shareware Version. To Decode all DTCs
    P1171 - 35-10 - Please Register/Activate - Intermittent
    17862 - Shareware Version. To Decode all DTCs
    P1454 - 35-10 - Please Register/Activate - Intermittent
    17524 - Oxygen (Lambda) Sensor Heating: B1 S1: Open Circuit
    P1116 - 35-00 - -
    16518 - Shareware Version. To Decode all DTCs
    P0134 - 35-00 - Please Register/Activate
    17867 - Shareware Version. To Decode all DTCs
    P1459 - 35-10 - Please Register/Activate - Intermittent
    17536 - Fuel Trim: Bank 1 (Mult): System too Lean
    P1128 - 35-00 - -
    17777 - Shareware Version. To Decode all DTCs
    P1369 - 35-10 - Please Register/Activate – Intermittent

    Then i cleared codes and boost is back but this comes back
    2 Faults Found:
    17524 - Oxygen (Lambda) Sensor Heating: B1 S1: Open Circuit
    P1116 - 35-00 - -
    16518 - Shareware Version. To Decode all DTCs
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

  5. #4
    "Stick a V8 in it!"

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    16518 - O2 Sensor Circ.,Bank1-Sensor1 No Activity Detected

    Seems your bank1 main lambda is dead, or unplugged...

    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


  6. #5
    "Stick a V8 in it!"

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    Odd big text there

    The ones that arent detailed the first time round are:

    17579
    Throttle Actuation Potentiometer Sign.2 Range/Performance

    17862
    Exhaust gas temperature sensor short 1 to ground

    17867
    Exhaust gas temperature sensor 2 range/performance

    17777
    Cyl. 5, ignition circuit short to ground

    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


  7. #6
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    would that all be related to the lamba ?
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

  8. #7
    "Stick a V8 in it!"

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    fuel trim might be, EGT could if the fuel mix was weak, but that would affect both banks...
    Throttle is completely seperate, as is charge pressure limit exceeded.

    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


  9. #8
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    do you think that this would have anything to do with a rumble between from 80mph in 6th if you put your foot down cause that was gonna be my next post?
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

  10. #9
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    on the rollers!
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

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

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    How do you mean a rumble?

    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
    andybnwc's Avatar
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    Feels like could be drive shaft or prop, just feel a vibration but stops if you let off , i have noticed for a long time i get similar feel when harsh acceleration when turning to the right out of a junction for instance.... maybe i should start another post regarding that instead
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

  13. #12
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    That wouldn't affect your engine perfomance.

    Your turbos were second hand weren't they?
    Mo power, mo problems

  14. #13
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    nah , turbos was new and sealed but , performance is back now after clearing the dtcs it just seems to of got a vibration probably not related but will have to replace lamba first i suppose
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

  15. #14
    "Stick a V8 in it!"

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    keep a very close eye on the DTC's

    Scan it every day, and keep an eye on them coming back.

    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


  16. #15
    andybnwc's Avatar
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    will do,ill take it for a health check with grizz when i can get a day off and do the lamba at the same time as i get the exhaust fitted.
    Wheres best to buy a lamba ?
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

  17. #16
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    Grizz is stripping a burnt out RS4 at the moment, so he might be able to use one of those. Failing that, GSF might have some new. Not cheap though.
    Mo power, mo problems

  18. #17
    andybnwc's Avatar
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    thought they was like 30 or something . Anyone got a part number or replaced one? how many are there? Ive done the egts on the drivers side(easy side) is it a similar proccess , cant seem to find any guides
    99 Nogaro S4 now black bonnet and roof,blackdiamond discs and pads,Hybrid K04 with uprated actuators ,Rs4 clutch custom lightweight flywheel, esp lightweight pulley set ,Rs4 intake pipes ,rs4 mounts ,full samco hose set,F-hose delete ,BMC carbon induction, full stainless exhaust with de cat pipes, custom chip,18"ultra lights,LED rear clusters,6000k xenons ,LED sides,KW coilovers,powerflex bushes ,Boost guage in pillar pod,isotta steering wheel and gearknob,B&M short shifter

 

 

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