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
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
TP should stay steady at whatever throttle position is at...
so either the throttle butterfly shaft is moving or there is a wiring problem.
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
If it's DBW, then I have seen manifold vacuum pull on the butterfly plate.
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
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
Check that wiring is ok (tug on itm check for breaks).