TDI 110 Loss of Power

[TDiDude]

Can anybody please help me? Got a Leon 110 TDi SE, every now and again it feels like the turbo just dies and i have to restart the car to "reset" it?! Spoke to Seat specialist locally who told me it was airflow meter, which i then replaced but same prob keeps occuring, and there are no faults stored that show on diagnostics, im at a loss.

 

[Viking]

What are you using to diagnose the car? If it's going into limp mode (which are the symptoms you describe) then it'll be holding a fault code for sure.

 

[TDiDude]

my bro works for AA and used his toughbox to try to diagnose, wasnt picking up any faults at all........

 

[Viking]

You need someone with VCDS (formerly Vag Com) to interrogate the ecu and see what's been logged.

I suspect it'll be an overboost issue related to stuck turbo VNT mechanism.

 

[James_R]

The AAs equipment will only pick up very basic OBD faults not brand specific ones.

 

[sssstew]

"spoke to seat specialist locally who said it was the MAF" .... typical! no idea eh.... very rarely does a dieing maf cause limp mode.

It will be boost leak or sticky turbo most probably. Like mentioned above get someone with a fault code reader to check, the reason it goes into limp will be in there.

Theres loads about these issues in this TDI section so once youve found out have a look back through for info on how to resolve.

 

[cypher007]

defo

+1
sticky VNT, mine does it at 3000rpm in fourth. i found the actuator seems sticking on mine, i managed to free it off for a while with some WD40, i think.

 

[LewisLeon]

Very similar thing happening with my Ibiza Mk3 TDi 110.
Had it checked over on the VCDS during a recent service, coming up with pressure regulator issue...can't remember the exact terminology that it was showing on the computer.
The guys at the garage said there's 3 or 4 turbo-related regulator valves that may need changing, failing this a new/re-furb turbo. Does this sound about right?
Sorry for hi-jacking this thread by the way, just wondering if the diagnosis on mine may be similar to some of the problems you guys are experiencing.

Cheers.

 

[cypher007]

there is a pressure sensor on the intercooler that can play up, mine had this fault code, i replaced the sensor, but i still get limp mode due to the actuator or vnt sticking.

 

[hoggy90]

Can anybody please help me? Got a Leon 110 TDi SE, every now and again it feels like the turbo just dies and i have to restart the car to "reset" it?! Spoke to Seat specialist locally who told me it was airflow meter, which i then replaced but same prob keeps occuring, and there are no faults stored that show on diagnostics, im at a loss.

got the exact same problem mate...when i say exact i mean exact to the T!
im taking mine to a very well equipped garage tomoro to see what they say...and a member off here has offered to use his vag com on it but he didnt have vag com uploaded right so were gonna try again this weekend i hope lol....let me know if you get it fixed and how!

 

[TDiDude]

it would appear that the nice honest car dealer has removed the light from the dash!!! Guessing he new bout the problem when he sold me the damn car, oh well, trading standards involved now and if all goes to plan, i will buy my managers 180 off him lol

 

[FSiLeonMike]

"spoke to seat specialist locally who said it was the MAF" .... typical! no idea eh.... very rarely does a dieing maf cause limp mode.

It will be boost leak or sticky turbo most probably. Like mentioned above get someone with a fault code reader to check, the reason it goes into limp will be in there.

Theres loads about these issues in this TDI section so once youve found out have a look back through for info on how to resolve.

Gotta agree, when the MAF goes.....................it goes

Car runs like a sack of ****, doesn't go into limp mode, it just doesn't go.

When my MAF went, couldn't get above 2500rpm in top gear. New MAF fitted, and normal service resumed

 

[TDiDude]

just had it on diagnostics, two faults found 1)17664 P1256 Engine Sporadic coolant temperature (ECT) sensor-G62pen/short to B+
2)17965 P1557 Turbo super charger overboost condition:control limit exceeded
Looked them up but several possibilities, anybody had these before?? Sorry im no mechanic by far lol

 

[sssstew]

ok, so replace the coolant sensor for the first one.

then the overboost warning will probably be due to sticky turbo vanes, get it cleaned up.

 

[joshpmc]

MINE DID THIS (ASV ENGINE) AND IT TURNED OUT TO BE A LOOSE CONNECTION, PROBLEM IS I CANT FOR THE LIFE OF ME REMEMBER WHAT CONNECTION IT WAS!! aWESOME GTI SORTED IT FOR ME FREE OF CHARGE!! SORRY ABOUT THE CAPS KEYBOARD IS BROKEN!

 

[Dino1300]

I had a MAF go and the car felt like it had about 20 bhp and did 20 to the gallon.

I put a mercedes one on, 1/2 the price and twice the reliability. I just had to file a small bump off the connector and put a cable tie.