ghunt

I leave for work pretty early and have several neighbors very close to my house. Of course, it would be easy to just start the car and sneak out in the morning if it weren't for that 1500 RPM kick that the car does at startup (which I know is to reduce startup emissions). I don't want a quiet exhaust but I don't want pissed off neighbors either.

I have an SF3/X3 tuner, can Bama tune it so the car only kicks up to maybe 1000 rpm or so? It would definitely keep the volume down at startup.

awbreyjd

they can, but that kick is also to keep the car running while the O2 sensors warm up enough to get a reading. Many things in a car dont work until there is a little warmup time. If you got the rpm to be lower on startup it might just die.

AMDanBailer

Ghunt,

We can definitely work on this for you. The above post is right, the reason we kick the idle up is to give all your cars components a chance to warm up!

We can definitely lower the idle to you a bit. Give the Bama team a call and they'll get you squared away, very quickly! Our Bama Performance tuning specialists are here in the building Monday-Friday from 9AM-5:30PM EST and Saturday 9AM-5:30PM EST. You can hit them up directly at 888.226.9764!

-Dan

Derf00

I would be careful of messing with that as it is related to Emissions (open loop vs closed loop emissions) I don't know WV emissions laws but if you mess with that it could cause your car not to pass?

Just thinking ahead for you.

ghunt

No emissions testing here...

Also, to help things warm up?? This startup RPM kick is a newer feature, and I guarantee it's to clean up cold start emissions. I can't believe it's good to have a dead cold engine fire up at 1500-2000 RPM though. The car isn't gonna shut off because I cut that down a few RPM's.

petrock

New feature to whom? Most fuel injected vehicles, especially those with O2 sensors, have a high cold idle. They have been doing it for decades. During cold startup, the computer is using the MAF and a couple other sensors to tell how much fuel to put into the motor. Its call "open loop" mode. When the motor is warmed up, the computer switches to listening to the O2 sensors to determine how much fuel to put into the motor. This is called 'closed loop' mode. Google it...


Unless you have poor oil pressure, the motor will be fine.


A few RPM's, probably not. But enough RPM's to not **** off your neighbors, probably. It would be due to lack of fuel.

But one thing isn't celar from your post. Is the 1.5k/2k RPM a quick burst, or is it sustained for a few minutes? If its a quick burst, then its normal. If its sustained, then its a bit high. Try cleaning your MAF & IAC valve and see if it goes down.

Good luck...

Norm Peterson

On cooler/cold mornings, mine (with the FRPP cold air & tune) will hold the fast idle for at least a minute and usually longer if there's either ice or hard frost on the windshield.

That's exactly why I wouldn't want the low temperature viscosity number for the oil to be higher than 5. At no load even at high idle, it's oil flow that you want, not pressure per se.


Norm