Variable Valve Timing - Measuring it
#1
Variable Valve Timing - Measuring it
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 ?
Is there software out there that will allow you to do this with a M273 engine ?
#2
MBWorld Fanatic!
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.
#3
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.
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- Mover - (09-05-2017)
#5
MBWorld Fanatic!
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
There are also tests you can do that produce graphs showing you if the advance curve follows the mapped curve
#6
What software will produce these graphs ?
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#8
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.
I found information for the M272 engine, however, I can't find anything for the M273.