Does the infamous throttle hesitation problem created by Drive-By-Wire exist on 5th generation 2AZ-FE Camry with 5 speed manual transmission?
In other words, does DBW latency affect both auto and stick shifts?
Does the infamous throttle hesitation problem created by Drive-By-Wire exist on 5th generation 2AZ-FE Camry with 5 speed manual transmission?
In other words, does DBW latency affect both auto and stick shifts?
Hummmm. Dunno. As far as I know, my corolla uses the "throttle by wire" setup so to speak, and I don't notice any real latency at all.. I've noticed in the manual that they say if it ever conks out, I'll have trouble getting much throttle, and will likely notice vibration.. ?? They say the car will still be drivable at low speeds, I guess using a bit of physical push with the pedal. But anyway, the throttle on mine seems very fast. I've never noticed any lag. In fact, it seems as fast as a normal linkage as far as I can tell.. But maybe mine is different.. BTW, mine is a auto, not a manual. Don't know if that makes a difference or not.. I guess the best way to test is to actually drive one and see how it feels. MK
I would imagne so. I have a Scion tC with the same engine, and there is a slight hesitation.
I don't drive the car that much, and I have a Mazda 626 ('89) that has the traditional throttle cable, so I notice it in the Scion. However, the more I drive the car, the less it bothers me...
I have read several reasons on the internet on why a hesitation on the
2007 2AZ-FE Camry (6th generation), not sure about the 5th gen.
Interesting.. could you clarify this point? Where are these wires?
you can read more on,
On Sep 7, 10:32 pm, EdV wrote: ....
Thanks for posting, much other interesting info there.
It seems DBW is a good concept in theory, but it appears there are some bugs in it to be worked out, especially in the new 5-speed automatic transmissions.
It's also not clear if the throttle delay is a result of DBW technology or Toyota's new Variable-Valve Timing technology.
It's the DBW. I've had VVTi on other cars with no problems.
On the Scion, there is an adjustment under the throttle, in the form of a screw. You can adjust the screw to take up some of the 'slack'. I did this and the hesitation diminished noticably.
Maybe I'll try the grounding trick next...
Folks, this procedure is a waste of time. If you notice, the only improvement he noted was a slight reduction in the ground resistance between the fender/body and the battery ground terminal (at least I presume that was his reference point). That improvement is meaningless as none of the important systems in the vehicle are grounded to the fenders.
There is one exception to the above statement. If your radio antenna is mounted on the fender and you are getting ignition noise on AM, then adding a good ground bond to the fender "might" reduce the noise.
I might also add that the improvement he shows will only be temporary. His method of constructing the ground straps will allow them to corrode in about a year. The heat shrink won't protect them from road salts and moisture. The straps should be made out of braided wire and the connectors should be crimped AND soldered. Heat shrink will make them look pretty but isn't necessary.
Jack
it may, but on the lotus elise, there's really no latency. the power train on the elise is pure toyota. and it's TBW. that's a reason i bought mine. sam
His grounding methods are good. Ideal material would be solid strap copper, but it's hard to work with. Soldering is not as good as a properly done crimp, wirewrap or crimping is performed for the most critical applications and is more reliable than solder for point to point wiring. The grounding of the fenders is proven to lower ignition noise in radios, as is grounding the tailpipe in the rear of the vehicle. Whether or not it makes any difference as to engine performance I'd be skeptical about that. I give him credit for doing the work and trouble of taking pictures and sharing with others.
Dunno, mine has both, and like I say I notice little if any lag.. I don't really see how the VVT could have much to do with it. It might effect power at certain rpms, but shouldn't effect the actual throttle response. MK
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