do you feel your compressor kick on?

[Cajun93]

Originally Posted by ha1156w

..... and I have to hold the brakes more than just "lightly" at stoplights or it creeps.

Thank god! I thought it was just me or--- in my imagination. It is the ONLY thing that bothers me on my new TSS- that and the fact that my huge tires track the road like a roller coaster.

Still wouldn't trade it for anything else, any price range.

[merkenball]

I can feel it when stopping at lights, i didn't know what it was at first. It almost feels like if you click off the overdrive when coming to a stop, like the truck gears down or something. I never felt it will my 03 tacoma dc, but the first time I test drove my 06 dc it stuck out like sore thumb.

[Heatwave]

Originally Posted by 05DC

Maybe it's just me......whether I'm cruising in town or cruising down the Interstate, I can always "feel" when the A/C compressor kicks on and it's kinda aggravating. I'm sure if we had 500 horses under the hood, the compressor wouldn't phase the motor. As a matter of fact, it seems like it kicks on every couple of minutes. Is this normal? There's definitely no issues with it not being cold enough.

It's normal. That's just the way the a/c works. I don't know what could be "aggravating" about it ... it's just your truck's way of providing you with cold, dehumidified air. All vehicles with a/c do that.

[Brad's Dad]

The creep at stoplights when the compressor kicks on is my issue. Normal or not, it's very unsettling to find yourself moving.

I can imagine lending my vehicle to someone, (them being unfamiliar with it) and they report back that they pulled up a little too close to the car in front at a stoplight, diverted their attention momentarily to something inside the vehicle because the truck was stopped, the AC kicked on and they bumped the vehicle ahead. For that matter it could also happen to a familiar driver.

I'd like to hear from an engineer why the raise in RPM's is necessary. It'd help me balance out my dislike for this "normal" Tundra behaviour.

[Heatwave]

Originally Posted by Brad's Dad

The creep at stoplights when the compressor kicks on is my issue. Normal or not, it's very unsettling to find yourself moving.

I can imagine lending my vehicle to someone, (them being unfamiliar with it) and they report back that they pulled up a little too close to the car in front at a stoplight, diverted their attention momentarily to something inside the vehicle because the truck was stopped, the AC kicked on and they bumped the vehicle ahead. For that matter it could also happen to a familiar driver.

I'd like to hear from an engineer why the raise in RPM's is necessary. It'd help me balance out my dislike for this "normal" Tundra behaviour.

Well ... I'm not an engineer ... but I did stay at a Holiday Inn Express last night.

The increase of maybe 100 rpm at idle is merely to keep the electrical system charging.

I'd be interested in knowing what other makes of vehicles you have had that (1) didn't idle up another 75-100 rpm (+/-) when the a/c compressor engages while idling, and (2) didn't creep ahead when stopped and you don't apply the brakes.

[stevekx]

I started a thread about this a while ago, the A/C is definetly takes a bit out of the engine. This is suprising because in my 4 cyl Ford Ranger the A/C was colder and it did not phase the motor at all. In my 4 cyl Subau the same thing the A/C had no effect on the motor.
I guess Toyota needs to find a better compressor.

[Brad's Dad]

Originally Posted by Heatwave

Well ... I'm not an engineer ... but I did stay at a Holiday Inn Express last night.

The increase of maybe 100 rpm at idle is merely to keep the electrical system charging.

I'd be interested in knowing what other makes of vehicles you have had that (1) didn't idle up another 75-100 rpm (+/-) when the a/c compressor engages while idling, and (2) didn't creep ahead when stopped and you don't apply the brakes.

Well, unless you have a tach it's not possible to know for sure what's going on RPM wise but I don't recall seeing the rpm's rise. I will say that the company I work for has a dozen assorted vehicles (mostly pickups) that I drive and over the last 15 years I've owned 3 passenger vehicles and driven many more assorted vehicles over the years- none of which creeped.

I take it you've experienced this as normal on vehicles?

Thanks for the electrical system idea - makes sense.

Fred

[Brad's Dad]

Originally Posted by Heatwave

Well ... I'm not an engineer ... but I did stay at a Holiday Inn Express last night.

The increase of maybe 100 rpm at idle is merely to keep the electrical system charging.

I'd be interested in knowing what other makes of vehicles you have had that (1) didn't idle up another 75-100 rpm (+/-) when the a/c compressor engages while idling, and (2) didn't creep ahead when stopped and you don't apply the brakes.

I just re-read your post again and think there's a misunderstanding. On my vehicle (and I'm assuming others with creep) the brakes remain applied as they were when the vehicle came to a stop. It requires additional force on the pedal to make it stop creeping after the compressor kicks on and the computer bumps up the idle. Sorry, missed that nuance in your post so early this morning.

[Knot a Yacht]

I experienced this for the first time on my new to me tundra yesterday. I have had it all but 3 days so far. But I was at a stop light and the compressor kicked on. I had enough brake pressure to stop the vehicle until the compressor kicked on and then the truck started to creep forward until I applied more pressure. Now I just put more than the needed pressure and it does not creep. But I have to consciously remind myself to do this.