slight delay between pedal and acceleration?
#1
slight delay between pedal and acceleration?
When i was coasting down a hill the other day i noticed that when i pressed the gas it would take about a half a second before i saw the revs jump. In fact if i tapped it real fast, my foot would manage to leave the pedal before the rpms would respond. I was wondering if this is normal. I know it wont be instantaneous but it seemed a little slower than i would have expected. It doesnt seem like it would be a big problem, im just wondering if its normal or if no one else has seen this... I can call the dealer i guess.
Thanks
Thanks
#2
I have an 05 xb and it does the same thing, and I have seen posts on here pretty regularly of people saying the same thing, not sure if theres a fix, maybe modifying the throttle a little bit would help, but it doesn't bother me that much so I couldn't tell ya.
#4
I had the same problem with my Dodge Dakota and to a lessor degree, my XB2. I fixed it on the Dakota by modding the TPS. It involved removing the bushings from the TPS mounting holes and rotating the TPS slightly to achieve the desired voltage at closed throttle. Throttle response was much improved afterward. I got the idea, desired voltage and instructions from some Dakota newsgroup. I haven't looked into modding the XB2 TPS yet.
#5
I called the dealer and he said he hadnt heard anything about it but i could bring in the car and he would check, so ill do taht sometime soon.
When i googled the issue i came across a few threads that mentioned it as a problem in the Camrys, and the new XB does use a camry engine.....
When i googled the issue i came across a few threads that mentioned it as a problem in the Camrys, and the new XB does use a camry engine.....
#8
I am not a big fan of drive by wire, it's really difficult going from my 3000GT to my gilfriend's tC because it causes me to rev funny when shifting in the tC. Unfortunately it's what every company is doing now so I guess I have to deal with it. :-/
#10
Originally Posted by eyeeatingfish
When i googled the issue i came across a few threads that mentioned it as a problem in the Camrys, and the new XB does use a camry engine.....
#12
is your car an Auto? I haven't noticed that problem in my 5-speed xB, but did notice this in the Auto '05 tC... According to the dealer I talk to though, they had fixed that by the '06 models.
#15
Originally Posted by ScionFred
I had the same problem with my Dodge Dakota and to a lessor degree, my XB2. I fixed it on the Dakota by modding the TPS. It involved removing the bushings from the TPS mounting holes and rotating the TPS slightly to achieve the desired voltage at closed throttle. Throttle response was much improved afterward. I got the idea, desired voltage and instructions from some Dakota newsgroup. I haven't looked into modding the XB2 TPS yet.
#16
Originally Posted by draxcaliber
because replacing these with lightweight parts reduces rotational mass, it helps the engine increase rpms faster for better throttle response.
Your solution will not help this problem. You could take the pulleys off, make the engine internals out of forged titanium alloy, and remove the rest of the drivetrain (clutch, flywheel, etc) and it would not help. If the throttle blade on the engine does not move, the engine will not spin up.
Lighter rotating pieces will just help the engine spin up ONCE THE THROTTLE RESPONDS.
#19
Yeah there is a delay because the engine is trying to operate smoothly to maintain clean emissions and proper air fuel ratios. In a way it is nice that is smooths out a nervous gas foot - I have a friend with a Prius that drives the onboard computer crazy with throttle and regen. You may find better response at a higher rpm but other than that it is just a build in delay you have to live with. I have heard that some tC owners put in grounding kits for the battery and it improved throttle response. The 1st gen xB engines are throttle by cable but also have a bit of a delay from the fuel injection system and you can drive it crazy if you pump the gas really fast too or dump the clutch too quick and drop engine rpm.
#20
Just hit the gas a 1/2 second sooner and it will take off normal. Just kidding as stated above it is all do to the drive by wire system. With a manual trans it is not really noticed at all and under normal driving with a auto it is not really noticed only when you mash the gas does one notice the slight lag. Fix at this time is no where in sight