Cam timing on Dyno
 

Hey guys.

I was at the tuner shop yesterday for dyno tune.

The cam timing reading is not moving while the car is on dynopack, even after 4 times of flashing.

However, it's back to work when we pull the car out for street dyno.

Have any of folks here had this issue before?

PS. tuning software - ECUtek

Not seen this on a Dynapack before. There are a number of things that need to happen for the cams to become active, namely clutch pedal not depressed and at a standstill. Oil temp also comes into play.

+1 on what @Kodename47 said


After a flash or ecu reset cams wont activate unless you start car and let it idle for about a minute.


Their may be some other conditions as well.


If think if you press accelerator or move car before the minute is up the cams wont activate , until the car is turned off then started and let idle for a minute stationary (wheels not turning)

Your tuner just wasted 100% of that dyno time.

That's not entirely true. I've seen the cams become active immediately after a flash if the conditions are met. Once you've done a dyno pull you can just flash, clear codes and fire it up and go again. Also hitting the throttle won't necessarily prevent its calibration, once back at idle it will sort itself out again.

Yeah all true, but if you do the start idle for a miniute you seem to be good good to go every time.

Probably in your climate ;) I can leave it to idle for a minute and the cams wont be active as the oil temp isn't hot enough. Drive for 30 seconds to the end of the road and idle again and they'll usually start to work.

It's worth noting that I will allow for the engine to idle for a minute on a cold flash, however if the engine is warm I wait until the cams show signs of movement. If you're using ECUtek then some AVCS parameters log to the nearest degree, others to 1 dp.

We've tried everything like oil temp hits 80 and he tuned quite a lot of twins from before. He did a FR-S that has the same issue with the cam timing but solved after a flash. However, didnt happened on my car

So I was wondering why.

"Tooner"

Flash the stock tune back to car


cams work = yes = problem with tune
cams work = no = problem with car

Nah wrong TUNA


https://timewellness.files.wordpress...0&h=320&crop=1



Actually canned TUNA

We've had one car last year that was similar. Would not set the cams no matter how long you idle. What we found is that if you take it up to road speeds on the dyno and then decel in 3rd gear a few times, they would then set. Not sure exactly why, certainly nothing about the setup as it was identical to a dozen others.

Had similar behavior happen, immediately after flashes, when doing road driving. No amount of deceling would fix it -- a power cycle would though.

My MoTeC programming doesn't have this problem, however. The cams move every time, lol

Mine always work flashing cold. But may not activate after flashing hot and idling for a couple minutes until a restart.