MK4 Golf GT TDI PD115 Power Issues
Discussion
The car is a 2001 Y plate GT TDI PD115.
Some may remember me from last time I had power issues, first time was a few broken wires the second time the turbo failed.
However the previous times the car was losing power it went into "limp mode" when under load and power only restored when the ignition was switched off and the car restarted.
This time is slightly different because it loses power randomly, i.e. not under load. It just loses power and feels as though it has no boost at all then power comes back suddenly, no need to switch off/ restart.
To give you an example I set off normally in first, changed into second and felt as though it was in fourth, so I pressed the accelerator several times (part and full), then after a few times it shot off like it would normally. Another was driving along normally in fourth and power died off suddenly then a few seconds later power was back to normal.
The car has done 93,000 miles but it has just been serviced within 1000 miles, because of the previous isses it has had i have already changed (within the last 15,000 miles); brand new turbo, mass air flow meter, MAP sensor, temperature sensor and a pressure convertor. Sorry for the lack of detail on the parts changed.
The car will be fault read later this week and after speaking to a few people they have said it could be the EGR valve or the fly-by-wire throttle?
I would greatly appreciate if anybody could shed any light on what they think could be causing it.
Some may remember me from last time I had power issues, first time was a few broken wires the second time the turbo failed.
However the previous times the car was losing power it went into "limp mode" when under load and power only restored when the ignition was switched off and the car restarted.
This time is slightly different because it loses power randomly, i.e. not under load. It just loses power and feels as though it has no boost at all then power comes back suddenly, no need to switch off/ restart.
To give you an example I set off normally in first, changed into second and felt as though it was in fourth, so I pressed the accelerator several times (part and full), then after a few times it shot off like it would normally. Another was driving along normally in fourth and power died off suddenly then a few seconds later power was back to normal.
The car has done 93,000 miles but it has just been serviced within 1000 miles, because of the previous isses it has had i have already changed (within the last 15,000 miles); brand new turbo, mass air flow meter, MAP sensor, temperature sensor and a pressure convertor. Sorry for the lack of detail on the parts changed.
The car will be fault read later this week and after speaking to a few people they have said it could be the EGR valve or the fly-by-wire throttle?
I would greatly appreciate if anybody could shed any light on what they think could be causing it.
Had the car fault read tonight and no error codes were present, however it was a simple code reader machine and will get it checked again by someone with VAGCOM or better code reader.
It was suggested by an ex VW mechanic to check the EGR valve, which was removed tonight and all deposits cleaned away, Couldn't find a way to check if the diaphragm wasn't torn though.
Although it didn't do it at all on the journey back from the garage tonight, i'm not sure if the problem has gone.
Nobody any ideas? Any possible things to check?
Many thanks
It was suggested by an ex VW mechanic to check the EGR valve, which was removed tonight and all deposits cleaned away, Couldn't find a way to check if the diaphragm wasn't torn though.
Although it didn't do it at all on the journey back from the garage tonight, i'm not sure if the problem has gone.
Nobody any ideas? Any possible things to check?
Many thanks
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