To all those with a turbo & running a greddy emanage.

Do you have the greddy pressure sensor installed???

I have one of these but I don't have the harness to connect it to the emanage main unit.

The question is do I NEED it.
However many more people are saying that they have no idea why I should need it.

At the moment my car is almost ready to be tuned however if I want to use the pressure sensor then I will have to wait for awhile, plus it will cost me $$.

Does anyone know if I need it??????

Not dissing anyone, based on what I've seen, many installers do not actually hook up all the 27 wires or so in the E-Manage, they only do the essential ones (Which means it still works, but not to full potential)

Whoever is going to install your unit, make sure all the wires are hooked up....

CHEERS

By pressure sensor we're really talking a MAP sensor, right?

My (limited) understanding is that using a MAF sensor will actually give you better tuning resolution and flexibility than using a MAP sensor, and I'd be surprised if you could use both together.. if the E-Manage is anything like Haltech's interceptor you pick one source for load input which is either going to be a MAF or a MAP sensor.

Downside with a MAF sensor on a turbo car is that you are only seeing air quantities pre-turbo, but a MAP will see post turbo pressure. Apart from that, a MAF gets restrictive quickly.

If no one on the forums can help you, give Street Torque in Alice a call. Dallas will sort you out in about 5 seconds.

On the subject of wiring in all the cables.. you shouldn't need to wire up everything. These computers do their adjustments pretty much on a three dimensional map - load on one axis and RPM on the other - the third dimension is the fuel or ignition timing adjustment. So you need wires to measure your load signal (MAP, MAF, raw throttle position) and one to measure RPM, then you need wires to intercept the injector and ignition signals. Other wires beyond this are likely to be additional signal inputs or outputs. Sure you can hook them up to measure road speed, or coolant temperature, or oxygen sensor output voltage, but that only makes sense if you can use them for something, like triggering an intercooler water spray, or a shift light, or whatever.

There is only one MAF signal line and one RPM signal and one wire to control the injectors and one wire to control ignition timing, so I'm not seeing why you're limiting your potential by not wiring up every conceivable input.