tp fluctuating

[h41ry]

i have just installed a larger cam into my vz ss ls1 i have tuned the car now just touching up the idle but have noticed that the tp fluctuates about .5% on idle my question is should it be fluctuating on idle

[joecar]

TP should stay steady at whatever throttle position is at...

so either the throttle butterfly shaft is moving or there is a wiring problem.

[h41ry]

thanks joecar for the reply
the throttle body seems fine and have went through a log from the previous cam that was updated to suit the ported heads i put on about 2-3 weeks before this new cam is it possible is might have something to do with the size of this new cam or something i have not done right in the tune

[joecar]

If it's DBW, then I have seen manifold vacuum pull on the butterfly plate.

[h41ry]

It is dbw if it is vacuum related is there a way to fix it. I will post a log file when I get home if you are happy to have a look

[h41ry]

here is a log file seems to be worse when the engine is cooler that was just in park but does the same in gear also

[joecar]

Check that wiring is ok (tug on itm check for breaks).