- Mover -

With BMW's software, you were able to test the functioning of the Variable Value timing and how responsive it was and weather it was in spec.

Is there software out there that will allow you to do this with a M273 engine ?

ItalianJoe1

There's no really "test" option. What problem are you having that makes you suspect insufficient VVT functions? This ins't Vanos, it's not known to just fall apart like the BMW garbage.

- Mover -

I don't have an issue.

I do this kind of stuff like you would do a compression or other tests on the engine.

I've run tests on some of those S85 V10 motors (BMW) and noticed some had slow reacting cam adjustment (due to the solenoids) or in some cases would not adjust to their full limits. This wouldn't throw a check engine light in most cases, however, power was affected to some degree because of this.

ItalianJoe1

You can run a cam adjuster test via SDS, but it will simply actuate them and will pass/fail.

Russell Ormerod

Cam timing is monitored closely by the ecu. Max advance and rate of advance. If its not performing it will trigger a fault code.
There are also tests you can do that produce graphs showing you if the advance curve follows the mapped curve

- Mover -

What software will produce these graphs ?

Russell Ormerod

Das

- Mover -

How many degrees can the intake and exhaust cams be adjusted ? Start / End points ?
I found information for the M272 engine, however, I can't find anything for the M273.

Russell Ormerod

Not sure. But check the part number of the 272 and 273 gears if they the same then the advance will be the same.