Still chasing my problem

Liam180cupra

Active Member
Jan 27, 2016
113
0
I have had my car in at a tuning company that managed to get my car up to 200hp but they said the ecu was safeguarding the engine every now and then. Think they said dropping fuel into the cylinders to slow it down.
When i got it back all was well after changing n75 and a few other bits.
It lasted about two weeks now im back to the way it was.
They suspected the dv was broken so replaced with forge and apllied green spring ( tried yellow but seems happy with the green)
No boost leaks as its been tested and has all silicon pipes now.
On half throttle it boosts well and doesnt seem to have any issues.
But once i put my foot flat it struggles and holds back.
Although my boost guage is showing the remapped 20psi.
It is very slow to get to 20psi compared to before.
Anyone point me to a few suspects i can look at?
 

Cupra Ross

Breaks things............
May 15, 2005
1,380
1
Edinburgh, Scotland
I have had my car in at a tuning company that managed to get my car up to 200hp but they said the ecu was safeguarding the engine every now and then. Think they said dropping fuel into the cylinders to slow it down.
When i got it back all was well after changing n75 and a few other bits.
It lasted about two weeks now im back to the way it was.
They suspected the dv was broken so replaced with forge and apllied green spring ( tried yellow but seems happy with the green)
No boost leaks as its been tested and has all silicon pipes now.
On half throttle it boosts well and doesnt seem to have any issues.
But once i put my foot flat it struggles and holds back.
Although my boost guage is showing the remapped 20psi.
It is very slow to get to 20psi compared to before.
Anyone point me to a few suspects i can look at?

Fuel pump.
 

DrewCole

Spannering the Cupra
Oct 19, 2015
697
1
Braintree, Essex
As above I'd look at fueling next, my first point to check would be to change the fuel filter as it is easy and cheap, plus is good to do anyway.

You could always remove the fuel rail and pull the injectors for a clean, I've used a SonicBath before to clean some on a different car.

Then if you need to check the pump before changing that, is required, get it flow tested first and the pressure tested. But that will need to be done by a specialist I would have thought.
 
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