Does the PCV compensate for cold temps?

Reply Subscribe

Thread Tools

Search this Thread

Oct 25, 2011 | 08:41 AM

dohadex

Thread Starter

Road Captain

Joined: Sep 2009

Posts: 718

Likes: 1

From: Panama City, FL

Does the PCV compensate for cold temps?

It's getting colder and I noticed that my bike seems to stay in "open loop" mode longer as it warms up.
My questions is this: Do I need to re-map for colder tempretures? Maybe a richer overall map?

Oct 25, 2011 | 08:43 AM

hopperop

Banned

Joined: Aug 2011

Posts: 122

Likes: 0

From: at home

You'll have to change the map.

Oct 25, 2011 | 08:52 AM

frog13

Outstanding HDF Member

Joined: Apr 2008

Posts: 3,140

Likes: 17

From: Wisconsin

I'm no expert on this at all, but I can very confidently state that with a good tune you should not have to worry about remapping for a change in temperature ...... I live in the Midwest and ride temps between 20 and 100 degrees F, never have an issue ........... of course, the colder it gets, the longer it idles high, but that just makes sense, the idle is based on engine temp and a colder engine takes longer to warm up.

Oct 25, 2011 | 09:02 AM

SGLarry

Road Captain

Joined: Jun 2006

Posts: 548

Likes: 7

From: Pittsburgh, PA

Yes, The MAP sensor on the bike will take care of the change and the PCV will still do it's job. From the way i understand it, they are independent of each other.

Oct 25, 2011 | 09:06 AM

hopperop

Banned

Joined: Aug 2011

Posts: 122

Likes: 0

From: at home

Quote:

Originally Posted by frog13

Has never worked that way for me. When it gets cold, fuel mileage goes down and the bike starts to run a little rough. I use a cold weather map to compensate. And it is not just the PCV, the TTS does it too. Probably all of them except maybe that new Rev ? whatever it is called, it is supposed to auto adjust, but I don't know that for sure.

Oct 25, 2011 | 09:07 AM

grbrown

Club Member

Joined: Jun 2007

Posts: 45,429

Likes: 2,897

From: Bedford UK

Your bike should adjust for changes of temperature, humidity and altitude, so you can ride from arid desert over high mountains and through raging storms! If you can't, something needs to be put right. We need someone to prove those extremes!

Oct 25, 2011 | 09:54 AM

frog13

Outstanding HDF Member

Joined: Apr 2008

Posts: 3,140

Likes: 17

From: Wisconsin

Quote:

Originally Posted by hopperop

You should consult a good tuner ....... you definitely have a problem. That is why these bikes are fuel injected and have an ECM, to accomodate for different fuel mixtures under different conditions. That is the whole purpose of a tuner, to give you the optimal mix of air and fuel under the prevailing conditions. Before this, a carbureted bike going from low altitude to high would need to be adjusted to accomodate for the loss of oxygen, today's bikes do this automatically. The same for temperature, you seriously should not have to change your map for the seasons. Holy crap, where I live, it was in the 80's one day, the 40's the next, I would have to flash my ECM every morning based on the weatherman. Sometimes there's a 40 degree swing between mid day and mid night.