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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "DRIVE BY WIRE 2003 Tundra!!! (throttle cable)", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
Maybe i am wrong, but I don't seem to have any problem with full throttle upon takeoff. I can leave 2 black marks 20 ft long no problem (mine is a limited slip differential.) Mine is drive by wire. maybe something else is wrong. Maybe your gas is cheap and when the motor starts to knock it retards the timing or something. I have had no problem.
Trust me, I can leave tire marks, but you Definatly DO not get wide open from a stand still on the 03. It's built into the ECU, almost like a cheap traction control, but I'm sure it's for emmissions.
honestly i haven't put more than 1000 miles on the truck and have never really had to pass anyone except on the interstate. It will leave tire marks, but this truck is way more powerful than any of my nissans ever were. So to me this truck is a race car. my two cents...
Quote:
Originally Posted by rsvees
Trust me, I can leave tire marks, but you Definatly DO not get wide open from a stand still on the 03. It's built into the ECU, almost like a cheap traction control, but I'm sure it's for emmissions.
Maybe i am wrong, but I don't seem to have any problem with full throttle upon takeoff. I can leave 2 black marks 20 ft long no problem (mine is a limited slip differential.) Mine is drive by wire. maybe something else is wrong. Maybe your gas is cheap and when the motor starts to knock it retards the timing or something. I have had no problem.
It definitely will not give full throttle. The '01 would (or at least more than the '03). Almost always "just enough" umph but when you want it, you want it and you want it all......
Couldn't you just manually drop the transmission down a gear or two and over-ride this devise?
Of course you would have to upshift before redline.
Even if the tranny was locked into gear or manually shifted, the throttle air butterfly valve is still controlled electronically, so the tranny will probably not affect the fly-by-wire system much (unless it changes the programming, but I doubt it would). I've owned many vehicles, and the Tundra has, by far, the most sluggish acceleration from a dead stop (if you floor the gas pedal). I've noticed that I get more acceleration at part throttle, but it hasn't been consistent. I'm sure the computer measures the rate at which the throttle is pressed, in additon to the position, and calculates how much to open the valve. Unfortunately, it seems that if the computer determines you want to 'play rough', it backs off, to save the engine and drivetrain from excess wear. The i-force is a great engine, and I wish we could use all the power it can give us!
If you have the touch, try a slow, steady application of the throttle
while at the same time the gradual release of the brake pedal.
I think it's called power brakeing.
If done correctly your off the line acceleration will improve.
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Maybe i am wrong, but I don't seem to have any problem with full throttle upon takeoff. I can leave 2 black marks 20 ft long no problem (mine is a limited slip differential.) Mine is drive by wire. maybe something else is wrong. Maybe your gas is cheap and when the motor starts to knock it retards the timing or something. I have had no problem.
stryker_20 .........not to say your dishonest but man i have a 03' with trd s/c and lsd and i cant leave 20' of rubber id be lucky to leave 2' feet - do you have the off road package or 265's like i do? maybe its cause you have smaller tires?
maybe i exagerated a little. i think it's more like 7-10 ft, still much more power than my v6 frontier. to me it feels like 20ft, i was amazed. sorry to mislead anyone.
Quote:
Originally Posted by mandzach
stryker_20 .........not to say your dishonest but man i have a 03' with trd s/c and lsd and i cant leave 20' of rubber id be lucky to leave 2' feet - do you have the off road package or 265's like i do? maybe its cause you have smaller tires?
If you have the touch, try a slow, steady application of the throttle
while at the same time the gradual release of the brake pedal.
I think it's called power brakeing.
If done correctly your off the line acceleration will improve.
I've tried this on my Tundra, but it didn't seem to help much, at least by seat-of-the-pants feel. I do know that technique worked on all my other vehicles that had a carb or direct EFI throttle linkage (and auto tranny). I've also noticed sluggish acceleration from a slow roll, such as 5 mph, so power braking will not help there.
A while back, some guys brought up this topic about power braking, and said it wasn't very effective, essentially because the computer will not allow the engine to rev much if the brake is applied at the same time. I haven't floored my throttle with the brake applied, but I remember someone saying they did that, but the engine rpms did not rise much. I guess the Unichip would be a possible solution, but I want to keep my truck bone-stock, at least until the extended warranty is up.
I just like to have consistent V8 power when I need it!
Dang, if all you guys want to do is smoke the tires, lay rubber, repave the road, whatever, just go and get a 1990 Mustang 5.0 and smoke that puppy into the ground. Have 3:10 gears installed, pour some dishsoap and bleach on the street and brake torque the daylights out of it! My brothers friend and dad do this. They already burned out an old camaro RS. No wonder everyone is so concerned about running synthetic oils, especially with the abuse of smoking the tires and brake torqueing...
Does drive by wire mean that theres not actually a cable that opens the "gas dumper" or whatever? The gas pedal is attached to a sensor and that sends signal to the computer which tells gas to open up?
Dang, if all you guys want to do is smoke the tires, lay rubber, repave the road, whatever, just go and get a 1990 Mustang 5.0 and smoke that puppy into the ground. Have 3:10 gears installed, pour some dishsoap and bleach on the street and brake torque the daylights out of it! My brothers friend and dad do this. They already burned out an old camaro RS. No wonder everyone is so concerned about running synthetic oils, especially with the abuse of smoking the tires and brake torqueing...
Does drive by wire mean that theres not actually a cable that opens the "gas dumper" or whatever? The gas pedal is attached to a sensor and that sends signal to the computer which tells gas to open up?
That's what drive by wire means...no cables...the computer
controls it all. Just like a fly by wire aircraft. You tell the
computer you want more power or less and it adjusts the
throttle valve opening, fuel mixture, and timing to give you
something close to what you want. It also controls the trans
as it is all electronic too. All vehicles will have this system in
the near future to meet the ULEV standards like the Tundra already does. They will all go to direct injection too...already
on some expensive European cars now...more power and less
pollution. The drive by wire does away with some other
components like the cruise control motor, and the idle air
control motor...makes for a simpler, cleaner engine bay.
yea thats why i'm glad i got one of the last real cable driven throttle controls. i have a '02.
on the subject about braking while accelerating, i've done this, and i held down the brake, and applied throttle, and the tires broke loose and the engine revved all the way up to redline, and i left a big cloud of tire smoke behind. it was cool. but it sounded gay. it was like "ierrrrzzzzzzzzZZZZZZzzzz" my brother was like " i didnt know you could peel out in that!" heh.
