Low top end power after 3000rpm no fault codes?

[UK88]

Hi All,

I'm struggling to figure out why my Audi A3 2.0 TDI 2006 140bhp (147k) is lacking power after 2500rpm.

1. I have no fault codes registered.

2. Taken for diagnosis, including test drive which showed no issues at all with boosting, however I feel like the car isn't even boosting after 2500rpm; just runs out of steam, and requires a gear change to keep accelerating.

3. I've changed the turbo, egr, maf and injectors (used 73k ones) with no major difference.

4. Fuel economy is down from 40-58mpg to 25-38mpg. Car is not smoking either.

The car idles and drives fine as long as I don't exceed 3000rpm which feels like its peak point for a gear change.

I suspect after everything changed it could be a weak fuel pump, tandem pump, restriction or the boost control solenoid block.

Has anyone experienced this before? Please do share your symptoms for any of the possible issues above so I can get a rough idea of what I could be. Thanks

 

[Daveyonthemove]

Have you changed the Fuel Filter and air filter?
Could be a blockage or restriction somewhere.

 

[UK88]

Yep, made no difference at all. Running out of ideas now. It’s even more frustrating to keep going to different mechanics and being told nothing’s wrong with it.

 

[Audia31992]

Hi All,

I'm struggling to figure out why my Audi A3 2.0 TDI 2006 140bhp (147k) is lacking power after 2500rpm.

1. I have no fault codes registered.

2. Taken for diagnosis, including test drive which showed no issues at all with boosting, however I feel like the car isn't even boosting after 2500rpm; just runs out of steam, and requires a gear change to keep accelerating.

3. I've changed the turbo, egr, maf and injectors (used 73k ones) with no major difference.

4. Fuel economy is down from 40-58mpg to 25-38mpg. Car is not smoking either.

The car idles and drives fine as long as I don't exceed 3000rpm which feels like its peak point for a gear change.

I suspect after everything changed it could be a weak fuel pump, tandem pump, restriction or the boost control solenoid block.

Has anyone experienced this before? Please do share your symptoms for any of the possible issues above so I can get a rough idea of what I could be. Thanks

Hi there having the same issue here did you find out what was wrong with it
Thanks

 

[samuelh_888]

Is it doing it’s regen or is the dpf blocked?

 

[aqibi2000]

Could be a crap map on the car

 

[UK88]

Hi there having the same issue here did you find out what was wrong with it
Thanks

Hi, unfortunately I haven't, just continued driving it as no faults have flagged up. Most likely will take it on a dyno/remap to see what its current power output is in comparison to stock.

 

[UK88]

Could be a **** map on the car

Mine really doesn't feel like its got a map on it tbh, but I'll see if its previously had one when I go to have mine remapped.

 

[nluk100]

Have you tried disconnecting the MAF and driving it, to see if it makes any difference?