Hello everybody..

I baught a Fabia Vrs back in February and never had time to get under the car to see whats where anyway:

I took the intercooler out of the car today and there was a sensor on the top of it now im assuming its a MAF Sensor as it must monitor some form of air temperatur coming in, I took it off the intercooler and it seemed to be very dirty and fragile looking using WD40 I sprayed over the metal sensor and cleaned it with a cotton bud being very careful and reinstalled it connecting the intercooler hoses back up all secure, there was only abit of oil in the intercooler cleaned it with a cloth, fitted it back on and took it for a quick run and it seems to be abit more responsive compared to usual and before I did it there was a very unoticable jerk when sat in the car at idle now cleaning this sensor has made this jerk go away which is good news.

My question is does this particular sensor make a hugh difference on fuel consumption if it is faulty/dirty? Obviously driving style will make impact but in general what is the purpose of this sensor please if you could fill me in that would be great.

I have also read up on here that the Fabia intercooler pipe pops off which can cause smoke and possibly a breakdown if they disconnect and can be a pain to put back on, the clips on my car seemed to be in good condition and there is hardly any play in the connection seems like a poor design but it seems to be working Jubilee clips would have been better? this is just an idea I know duct tape is very durable would any of you agree wrapping duct tape on the pipes stop the pipes from popping off?

Your ideas and help is much appreciated.

That is the boost pressure (MAP) sensor - bascially measure manifold absolute pressure, and is key to turbo boost / control.

I suppose you don't have vagcom but if you did running group 11 measuring block tests allows you to see specified boost (unchanged if stock) VS actual boost. When these two things get separated by faults, it throws up a fault code which you can read.

Forgot to add that sensor also measures intake temperature too.

That is the boost pressure (MAP) sensor - bascially measure manifold absolute pressure, and is key to turbo boost / control.

I suppose you don't have vagcom but if you did running group 11 measuring block tests allows you to see specified boost (unchanged if stock) VS actual boost. When these two things get separated by faults, it throws up a fault code which you can read.

Forgot to add that sensor also measures intake temperature too.

Nice one for the reply, also I dont have vagcom seems like a good investment tho.

There is no error on the dash, I was curious to see if there are any problems with the pipes rips or damage but the intercooler pipes were fine.

One thing I can say though since cleaning the sensor the low down pull compared to before seems to be better and when the turbo does come in it comes in smoothly and noticably, with abit of a whoosh noise still dont understand why the woosh noise is there or is this normal on Fabia Vrs? (scratches head)

car is stock as the day it was born

Edited 27 March, 201016 yr by REDFABVRS