Golf tdi possible turbo problems?
Discussion
Evening all, hope everyone is well? Hoping someone can shed some light on a problem with my 51 plate golf gt tdi 110 bhp, when giving it some beans usually accelerating uphill there is a sudden loss of power and I am then unable to go much faster than 40 mph, it feels just like the turbo has stopped working, there is no engine management light on the dash and full power is resumed by stopping then starting the engine again, have had a quick under bonnet check and nothing seems to be amiss, I am planning to investigate further tomoro but would welcome any suggestions?
pal has the exact same thing in his passat
dealers will tell you its the mass airflow sensor, it usually isnt but it wont stop them fitting a new one and charging you
there is a sensor on the front of the airbox, unplug it and see if the car goes better
if it does, replace the sensor
other reasons include stuck waste gate (i think)
these engines like their oil changed very often, and need VW approved (expensive) oil
dont skip oil changes
there is also some reason why the turbo sticks, not sure how or why tho
dealers will tell you its the mass airflow sensor, it usually isnt but it wont stop them fitting a new one and charging you
there is a sensor on the front of the airbox, unplug it and see if the car goes better
if it does, replace the sensor
other reasons include stuck waste gate (i think)
these engines like their oil changed very often, and need VW approved (expensive) oil
dont skip oil changes
there is also some reason why the turbo sticks, not sure how or why tho
I have VAGcom program which can hook up to the car and tells you what has caused the car to drop into limp home mode. Typically when it does giving full power its because it has sensed actual boost is higher than requested boost, caused by a sticky VNT mechanism in the turbo. Can be a sensor as well though.
I am in Devon (exmouth) if you want the car hooking up to see.
I am in Devon (exmouth) if you want the car hooking up to see.
The car had an oil and filter change when I bought it a few months back but not with VAG oil so that is on my list of things to do this week, thankyou for the offer of use of your vagcom TDIfurby, I know someone locally with diagnostic kit (launch and snap-on) so will try these this week also
Also worth checking the turbo pipe. Under the drivers wing, behind the bumper. The bottom pipe off the intercooler sometimes splits. On mine the coupling split. It was OK under low boost but once you wound it up it would blow itself apart. Ease off and it would go back too position and almost seal, giving some boost. You can looky see without taking the bumper off but you'll need someone hitting the throttle for you.
Edited by Misterpie on Tuesday 8th June 14:29
There are other things apart from turbo failure that can cause limp home mode. Although in fairness it is very likely.
DONT even think about spending money on a turbo until you have had it diagnosed propperly.
You need to know
What did the fault memory say?
What is the actually boost pressure when the failure occurs?
If you spend £500 on a turbo + 5 hours fitting it, and you only needed a £60 boost pressure sensor, you be pretty pissed.
DONT even think about spending money on a turbo until you have had it diagnosed propperly.
You need to know
What did the fault memory say?
What is the actually boost pressure when the failure occurs?
If you spend £500 on a turbo + 5 hours fitting it, and you only needed a £60 boost pressure sensor, you be pretty pissed.
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