Author Topic: Need Urgent help with my 1.8t  (Read 927 times)

Offline Jordan_gti

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Need Urgent help with my 1.8t
« on: 17 September 2018, 15:19 »
so, the other day my car threw a massive hissy fit and idled really rough & had no power. after much messing about I solved it by cleaning up grounds under the battery tray & re aligning throttle body.


I pulled out of work today (2 days later) and all of a sudden its idles started jumping again and I had no power. I also noticed the break pedal became rock solid and wouldn't stop the car. You can put your foot flat to the floor and the car revs as it pleases and stalls.


Im getting codes for throttle actuator & position sensors (Like I was before)
Malfunction in circuit for lamda (B1 S1)
I also got a code for pressure drop between turbo and DV, I found a split in the pipe that goes from top of the recirc which ive just changed.

Has anyone got any tips/advice for me?
2002 Golf Gti 1.8T (AUM) LC9Z

Offline Dalo Harkin

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Re: Need Urgent help with my 1.8t
« Reply #1 on: 05 February 2019, 12:13 »
If the idle changes, chances are its a boost leak, loss of power will be going into limp mode. If you get a boost leak off the brake servo the brake pedal will go hard usually because of the brake booster pipe is split somewhere.
ARZ K03s, Oettinger Side Skirts, R32 front, Carbon stage 2, Forge 007p (yellow spring), Forge Actuator (yellow spring), Pipercross panel filter with DSG parts, N249 and N112 deleted, SAI deleted, Carbon canister deleted, Rear wiper deleted, Long Life turbo back custom exhaust with 200 cell sports cat, VR6/G60 clutch kit, Creation Motorsport TIP, Catch can, 'Wellycooler', K04 charge pipe, S3 ported inlet manifold - looks pretty standard on the outside though :)