6 to 4 Pin OBD1 MAF

[poll250 0]

Has anyone changed from a 6 Pin to a 4 pin MAF on an OBD1 car? I think my car would run a lot better with a 4" housing (currently running 0.9 bar).

From what I know, later VR Corrados got the 4 pin MAF with the CP ECU (as well as Immobiliser and different Lambda). Having searched around Vortex, I found some threads saying you could just swap the MAFs and wire up as follows:

OBD1 6 Pin MAF 4 Pin MK3 Style MAF

Pin 1 ------(Brown/Yellow) ----------------> Pin 1 (Ground)

Pin 2 ------(Brown/Blue) ------------------> Pin 2 (Signal Ground)

Pin 3 ------(Red) --------------------------> Pin 4 (Signal)

Pin 4 (Black)(Burn Off Trigger Wire)

Pin 5 ------(Red/(Yellow or Blue) --------> Pin 3 (+12V)

Pin 6 (Not Connected)

Has anyone done this, or can you see a problem with it?

Andy

[UnitedMotorsport 55]

You need to change the ECU too.

[poll250 0]

So I just need a CP ecu, and 4 pin MAF? I don't need to change engine wiring harness, lambda plug or add an immobiliser ring or anything?

[agolebio 0]

Hey did you finally swap to the newer style MAF?

I actually managed to do it for my 94 corrado vr6. Exactly like you mentioned (took it off the vortex as well) how is it working for you??

I did it because of turbo upgrade and I wanted to use US C2 software.....

unfortunately it's not working the way it supposed to for me, not sure why. Seems like there is a problem in the software for TPS sensor (doesn't matter is I use stock chip or turbo one) - so I am wondering am I the only one with this issue?

When I have TPS connected the car bogs down part throttle (lean condition showing on AFR gauge) between 3-4k, it's not happening at WOT and when I disconnect TPS....