doctor austin Posted July 19, 2012 Share Posted July 19, 2012 Just wondered if anyone else with a 370 has this, not that its a problem just curious. On a cold start the exhaust note is decidedly rorty for about 15 seconds, then it quietens down to a smooth even fast idle. I have no leaks and the noise comes out of the exit pipes rather than a leak etc. I imagine its the engine management.. as I said no issue and the cars only done 12,000 miles etc and running a standard exhaust sytem....just wondering. Quote Link to comment Share on other sites More sharing options...
Will370z Posted July 19, 2012 Share Posted July 19, 2012 Same with mine mate and others that i have heard. Quote Link to comment Share on other sites More sharing options...
AK350Z Posted July 19, 2012 Share Posted July 19, 2012 350s and 370s all start with a fast idle from cold. Totally normal. Quote Link to comment Share on other sites More sharing options...
doctor austin Posted July 19, 2012 Author Share Posted July 19, 2012 Its not the fast idle its the rorty note ...just for the first 15 seconds..sounds a bit like the bafles are missing then it quietens down... my 350 didn't do this......but from the earlier comment from will370z it may well be a Idiosyncrasy with the 370 engine management. Quote Link to comment Share on other sites More sharing options...
R35LEE Posted July 19, 2012 Share Posted July 19, 2012 Same for all 370z's mate, nothing to worry about Quote Link to comment Share on other sites More sharing options...
The G Man Posted July 19, 2012 Share Posted July 19, 2012 Never had the stock system on for that long but even aftermarkets do this, I love it, sounds like a big mean V10 Quote Link to comment Share on other sites More sharing options...
Kev T Posted July 20, 2012 Share Posted July 20, 2012 My HKS SSM does this as well, nothing to worry about. Quote Link to comment Share on other sites More sharing options...
Mark@Abbey m/s Posted July 20, 2012 Share Posted July 20, 2012 its all to do with the variable lift/variable cam timing and cold start map. Once the car has been running a short time and warmed up it revert sback to the normal running map. Quote Link to comment Share on other sites More sharing options...
Ebized Posted July 20, 2012 Share Posted July 20, 2012 its all to do with the variable lift/variable cam timing and cold start map. Once the car has been running a short time and warmed up it revert sback to the normal running map. And with a valet parking map on retricting the rpm it certainly does sound like there is soemthing very big under the bonnet warming up, eh Mark Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.