Wrong induction kit, performance loss

[cupra-kid]

I bought a cupra at the weekend and the bloke i bought it off has put a cone induction kit on it, but i can only get about 120 top end, just wondering if the wrong induction kit can effect the top speed this badly?

 

[Bogwoppit]

Is the car standard or remapped? Does it have aboost gauge fitted?

 

[cupra-kid]

car is compleley standard apart from the air filter that he's put on.

 

[Bogwoppit]

It should pull more than 120, but I doubt it is anything to do with the air filter.
It could be you air flow sensor (MAF) on the way out.
Get a VW/Audi/Skoda/Seat specialist to check you car for logged faults on the ECU using vagcom etc. If the MAF is knackered the boost is limited by the ECU thus making the car slower.

I forgot to plug my MAF in once after doing some work under the bonnet, the car was very slow and would only boost to 5 psi, no fault lights appeared though. When I plugged it back in though all was well.

 

[cupra-kid]

So is there anyway of testing the MAF sensor to see if it is that thats faulty? Also where is it?

 

[Bogwoppit]

This is where my knowledge gets a bit hazy. I was under the impression that 2 ariflow sensors exist on the car. There is one just after the airbox that measures the air going into the turbo and there is one just before the inlet manifold that measures the air after the turbo. The one I accidently unplugged was the one by the inlet manifold and my car was really slow until I plugged it back in.
Hopefully someone will come on and correct me.
I don't know if they can be tested without VAGCOM. Try posting to see if anyone in your area has got VAGCOM or go to a specialist and expect to pay around £20-£30 to get the ECU codes read.

 

[ibizacupra]

This is where my knowledge gets a bit hazy. I was under the impression that 2 ariflow sensors exist on the car. There is one just after the airbox that measures the air going into the turbo and there is one just before the inlet manifold that measures the air after the turbo. The one I accidently unplugged was the one by the inlet manifold and my car was really slow until I plugged it back in.
Hopefully someone will come on and correct me.
I don't know if they can be tested without VAGCOM. Try posting to see if anyone in your area has got VAGCOM or go to a specialist and expect to pay around £20-£30 to get the ECU codes read.

Only one airflow meter. the one after the airbox.
you are maybe thinking MAP sensor which is a pressure sensor to know how much boost is produced, or AIT air temp sensor which is after the throttle.