CVT sputtering

dyno · Feb 16, 2008, 12:14 PM

Has anyone else noticed the CVT surge when holding at a constant RPM? I get on the freeway everyday going up a slight incline. If I am accelerating, there is no surge. When I try to keep a constant speed and constant RPM, I can feel the CVT slightly let off and then "engage" again. On level roadways I don't notice it, only when going up hill.

Also in sport mode around 3000 RPM (3rd "gear" going about 30-40 MPH) if I give it a little gas the needle drops before starting to climb again. Of course this can be compensated by downshifting but I don't always like to have the needle rise above 4000 RPM. What gives?

scorke · Feb 16, 2008, 01:33 PM

You have a transmission that works in mysterious ass ways, thats what gives.

Scorke

evo_soul · Feb 16, 2008, 02:39 PM

D mode makes adjustments to match your desired speed with a fuel efficient gear ratio. Throttle position is one factor but also remember that the car learns your driving habits too.

Its had to say if you have a fault in your CVT or not, how steep is the incline, even a AUTO tranny on an incline will shift on its own to maintain speed or match itself up to driver throttle demand.

BlueGTS · Feb 16, 2008, 08:16 PM

most cars do "gear searching" when going up hill, especially if you live in the mountains.

RC2099 · Mar 22, 2008, 01:39 AM

Quote:

Originally Posted by dyno

Has anyone else noticed the CVT surge when holding at a constant RPM? I get on the freeway everyday going up a slight incline. If I am accelerating, there is no surge. When I try to keep a constant speed and constant RPM, I can feel the CVT slightly let off and then "engage" again. On level roadways I don't notice it, only when going up hill.

Also in sport mode around 3000 RPM (3rd "gear" going about 30-40 MPH) if I give it a little gas the needle drops before starting to climb again. Of course this can be compensated by downshifting but I don't always like to have the needle rise above 4000 RPM. What gives?

There is nothing wrong. Going up hill the CVT is under constant stress and is continualy working to maintain constant acceleration and speed.

When traveling in a straight line on level ground, the CVT acts like cruise controll. It adjust gear ratios and throttle input to maintain the current speed. This only happens when you hold the accel peddle in the same place. This is how is sames fuel.

Scott