Faulty MAF sensor.

[thebr]

I've been getting a rough idle too and sometime it cuts out a few seconds after turning on first thing. 

I've just disconnected the MAF by disconnecting the MAF plug and im going to drive it home to see if there is any difference.

Can you let me know if this is enough for a test, that is, to disconnect the MAF plug, i assume i dont have to remove the MAF sensor as well as it wont now be feeding anything back.

I also presume its quite safe to drive it home? 

[Rhyso]

Fine to disconnect

How far is home though as it should only be for very short trips i.e I'd say less than 2 miles

[thebr]

Fine to disconnect

How far is home though as it should only be for very short trips i.e I'd say less than 2 miles

About 20 miles!

Maybe i'll stick it back on and go for a drive when i get home.

Can i ask, if the MAF is faulty would i notice a difference or the same issues?

I ask as if the MAF wasn't faulty i would expect disconnecting it by removing the MAF plug to decrease the performance of the engine not increase it.  If it was to stay the same then i would have thought the MAF must be faulty because its running the same disconnected as it was connected.

However i see other posts on here saying it runs better disconnected.

Any tips on expectations?

[Rhyso]

Yeah don't drive the 20 miles home lol

If the idle improves and it drives better with it DISCONNECTED its normally a sign the MAF is fubared

What's the mileage of the car?

[thebr]

Thanks for the feedback - much appreciated.

It has about 100k on the clock now - 1.8 GTI non turbo (for my sins)

[Rhyso]

Thanks for the feedback - much appreciated.

It has about 100k on the clock now - 1.8 GTI non turbo (for my sins)

Could well be due replacement really 

[thebr]

Thanks for the feedback - much appreciated.

It has about 100k on the clock now - 1.8 GTI non turbo (for my sins)

Could well be due replacement really 

Unfortunately i don't have cash to splash on theories.. Although this is looking like a good bet.

[thebr]

Well, i drove it a bit last night and i have some conflicting results.

When its off the idle seems better but there is a big dip in power around 2000revs, soooo im not sure?

[topman2u]

do have to have the maf connected all the time !! what happens if you drive without it connected !!

[chinojo53]

Hi everyone, i have in my Gti MkIV K04-02X turbo kit, 370cc inj, Revo software, Edelbrock fpc, FMIC, 3" inlet, 3" intake and oem maf sensor (AGU code maf sensor) with 3" maf air duct...my problem began when I push full throttle with very low fuel level and a injection misfire began intermitently...I already scaned it I I found  MAF sensor malfunction...I replace it for another one.::at first the problem was solved but then it started again even with high leve fuel...Any Ideas or suggestions PLEASE! (I also have and extra fuel pump directly to the fuel rail 3BAR at engine Iddle)