Revs Rise On Gear Change

[Steve ( West Mids )]

Hi .... had the IS200 four weeks now and at first I thought I wasn't doing the gear change right ( it's manual ) .... I noticed revs going up as I declutched. Took it out for a spin today and it was doing it again, thought it's not me. So watched rev counter as I dropped the clutch and foot off the accelerator first ... it definately goes up a few hundred rpm before it drops.

Is this normal?

[Steve ( West Mids )]

Come on guys ( & gals ) should the car do this ....... please .... ?

It's due in Monday for some fixes and want to know whether to add this to the list.

[v399]

I've had mine 3 yrs and still can't get used to changing gear properly, I don't think I get the rev rise but the timing does have to be accurate to get a smooth gear change. It doesn't seem to like gear changing at low revs but if you let the revs get over about 3000rpm it is as smooth as silk.

Maybe i'm just a crap driver

[Steve ( West Mids )]

Hi v, mine changes OK ...... but sometimes feel likes the foot should be more on the floor ( or through it ) lol, but pick up in 3rd is particularly poor if you don't rev it up in 2nd.

[GRiM]

Well Steve, you're not alone....

I've noticed this too, but only when the car is cold and the automatic choke is kicking in.

If I take my foot off the accellerator, and drop the clutch, the revs go up.

No matter how smoothly I change gear, the revs always increase a few 100rpm before dropping.

Goes away, after 10 mins or so of driving.

Anyone else.

[Mitch]

i'll check how my car is on saturday when i drive it next

[Steve ( West Mids )]

GRIM - spot on with your description. Been out again this morning and it does exactly what you say .... well I'll ask them about it when it goes in on Monday. I'll let you all know what they say.

[Veece]

I've had mine 3 yrs and still can't get used to changing gear properly, I don't think I get the rev rise but the timing does have to be accurate to get a smooth gear change. It doesn't seem to like gear changing at low revs but if you let the revs get over about 3000rpm it is as smooth as silk.

Maybe i'm just a crap driver  

I must be aswell - had mine about 2 months and still can't change gear smoothly every time. Seems to be a bit smoother the higher you let the revs go, but I don't like reving the engine when it is cold, so for about the first 10 minutes of each journey I have to wear a neck brace.

[Parthiban]

heard someone talk of an automatic choke

i thought fuel injected cars didn't have or need a choke

[RYX]

i thought fuel injected cars didn't have or need a choke  

Fuel injected cars have a "cold start". It does the same as the choke on a carburettor, ie. temporarily richens the mixture when cold. :P

[Risky3301]

Gentlemen, I might be barking up the wrong tree here, from all your comments it sounds like you are all suffering from what is known as 'Flares', when you De-cell and disengage the clutch your engine speed increases maybe by a couple of hundred RPM, this is trade-off with 'Tip In/ Tip out' the more the 'Dash pot' is reduced 'Engine cal term' for engine brakeing. the less 'Engine Brake' you have and the better tip in (bump)and tip out (bump), this would be more annoying than the 'flares' as these cause a low frequency oscillations which can cause car sickness for passengers during city driving.

Although I don't own an IS200, Currenlty car is on order (see below) when I had a test drive of a IS200 SE, I didn't notice any flares on the gear change, The only thing I had an issue with was the 'Fly by Wire' throttle, it took a while to get used to, it seemed a little to sensitive to me, that said, try and change your driving style a little. When you accellerate step in a little further and for slightly longer before changing gear, a little difficult with 1st as I found it a little to short. Lexus might have made a better job of the transmission if they had picked a ratio between 1st and 2nd for 1st gear and then only had a 5 speed transmission which may have been better for Drivability but not for marketing. The last thing I will say is, When I finally get my hands on mine and if it suffers from 'Flares' I will be straight back to the dealer complaining

[Sharaz]

Change gears @ 4,500rpm and see what happens.... a lot smoother.

It is a bit clunky in low gears and at lower revs.....or maybe I'm a crap driver as well.

[GRiM]

... it sounds like you are all suffering from what is known as 'Flares'..

Well it's good to see 'Flares' are back in style now!!

[Fidgits]

Mine has done this since I got it, but only if I'm revving hard, I haven't noticed with town driving.

I assumed it was part of the VVTI system to maximise performance during gear changes????

[lexicon]

this is trade-off with 'Tip In/ Tip out' the more the 'Dash pot' is reduced 'Engine cal term' for engine brakeing. the less 'Engine Brake' you have and the better tip in (bump)and tip out (bump)

I was right with you until then