Can a light weight flywheel cause hunting idle?
12-07-2010, 06:31 AM
#1
The Paranoid One
Thread Starter
Join Date: Apr 2006
Location: Texas
Posts: 5,320
Can a light weight flywheel cause hunting idle?
Had a hunting idle when my cams were installed.
Was really bad. Took it back to the tuner and they fixed it.
For some reason the email adjustments just would not work so they
had to have me drive it up there and do some datalogging and fixed it.
Everything was great after that. Ran fine for 3 mo.
Well, after I had my new clutch and light weight flywheel installed it is now back. It is not nearly as bad but still is annoying as a **** to me.
It will go from about 550RPM or so up to about 900 usually twice then settle
down at the 850 where it is programmed to be.
After the engine warms up it will not do it as much.
I also noticed it does it EVERY TIME i rev the engine in neutral.
I know it could be a dirty TB and I am going to clean it today.
But I also heard it could be the light weight flywheel itself.
That the flywheel is reading a different load on the engine and the computer is unable to compensate for it. Thus meaning I need a tune adjustment.
So I was wondering what your thoughts are on this.
If cleaning the TB does not work I will have to take it back to the shop
more than likely. I don't know how they could send an email adjustment
without data logging with a problem such as this... could they?
If I do take it back it wont be until later on at the end of this month because my clutch still is not broken in yet and I don't want to take it to them where they might romp on it before the clutch is broken in.
I also want to make sure that it will be ok for me to drive normally until
I can break the clutch in. Is it safe to drive it like this? Can the hunting idle hurt the car any?
Thanks for the input!
Was really bad. Took it back to the tuner and they fixed it.
For some reason the email adjustments just would not work so they
had to have me drive it up there and do some datalogging and fixed it.
Everything was great after that. Ran fine for 3 mo.
Well, after I had my new clutch and light weight flywheel installed it is now back. It is not nearly as bad but still is annoying as a **** to me.
It will go from about 550RPM or so up to about 900 usually twice then settle
down at the 850 where it is programmed to be.
After the engine warms up it will not do it as much.
I also noticed it does it EVERY TIME i rev the engine in neutral.
I know it could be a dirty TB and I am going to clean it today.
But I also heard it could be the light weight flywheel itself.
That the flywheel is reading a different load on the engine and the computer is unable to compensate for it. Thus meaning I need a tune adjustment.
So I was wondering what your thoughts are on this.
If cleaning the TB does not work I will have to take it back to the shop
more than likely. I don't know how they could send an email adjustment
without data logging with a problem such as this... could they?
If I do take it back it wont be until later on at the end of this month because my clutch still is not broken in yet and I don't want to take it to them where they might romp on it before the clutch is broken in.
I also want to make sure that it will be ok for me to drive normally until
I can break the clutch in. Is it safe to drive it like this? Can the hunting idle hurt the car any?
Thanks for the input!
12-09-2010, 11:49 AM
#4
2nd Gear Member
Join Date: Aug 2008
Location: CA
Posts: 479
I don't think it will damage your car at all. It's just the idle, and as long as it's still running you should be fine. The area where I see you doing damage is up in the rpm band. I know when i rev the engine it usually dips a little lower after like yours does. It doesn't sound like a big deal. I would call your tuner and double check with your tuner that it won't damage anything, but I think you should be ok. It could just be a character of the cams, maybe call Brenspeed and see what they say.
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