hello,
I've got a seat leon mk1 FR TDI with 173,000 miles on it. It was remapped to 183 bhp at around 90,000 miles and I've had it from 120,000 miles.
Over the last month or so it's lost power from the top of the rev range as though it's struggling for air and it has gone into limp mode once or twice if I drive it a bit harder than normal, but if I turn the car off and back on its fine again to drive normally. I thought it might have been the turbo outlet pipe had a hole in it as it is pretty close to the drive shaft, but I've just taken it off and can't see any holes in it.
Its developed a what I can only describe as a deep thudding noise, not mechanical at all, but you can notice it through the air intake., almost as though the car is burping a bit..
The car starts the same as always done, it doesn't smoke when driving any more than any other remapped diesel (i.e not white or blue smoke), it doesn't use much oil (about half a litre since the last oil change 10,000 miles ago), the only fault codes are one for the glow plugs (which wont go away despite replacing the offending plug) and an EGR fault as I removed the EGR at around 130,000 miles for a straight through allards pipe.
I'm thinking either turbo or cam shaft as it's quite down on power, but the engine is not rattley in a mechanical sense so I'm thinking (hoping) its not the cam. The intercooler pipes don't have much oil in them so I'm hoping it's not the turbo.
Are there any vacuum pipes that might give these symptoms if split? Or I've read abut sticky turbo vanes? Could it be that?
any help, or things to check would be very much appreciated.
mat
I've got a seat leon mk1 FR TDI with 173,000 miles on it. It was remapped to 183 bhp at around 90,000 miles and I've had it from 120,000 miles.
Over the last month or so it's lost power from the top of the rev range as though it's struggling for air and it has gone into limp mode once or twice if I drive it a bit harder than normal, but if I turn the car off and back on its fine again to drive normally. I thought it might have been the turbo outlet pipe had a hole in it as it is pretty close to the drive shaft, but I've just taken it off and can't see any holes in it.
Its developed a what I can only describe as a deep thudding noise, not mechanical at all, but you can notice it through the air intake., almost as though the car is burping a bit..
The car starts the same as always done, it doesn't smoke when driving any more than any other remapped diesel (i.e not white or blue smoke), it doesn't use much oil (about half a litre since the last oil change 10,000 miles ago), the only fault codes are one for the glow plugs (which wont go away despite replacing the offending plug) and an EGR fault as I removed the EGR at around 130,000 miles for a straight through allards pipe.
I'm thinking either turbo or cam shaft as it's quite down on power, but the engine is not rattley in a mechanical sense so I'm thinking (hoping) its not the cam. The intercooler pipes don't have much oil in them so I'm hoping it's not the turbo.
Are there any vacuum pipes that might give these symptoms if split? Or I've read abut sticky turbo vanes? Could it be that?
any help, or things to check would be very much appreciated.
mat