Loss of Power
Loss of Power
04-06-2016, 11:05 AM
steviewevie It might just be a coincidence, but see page 49 of this section of the technical description of the 2JZ-GE engine. It seems that at 4300 rpm the inlet manifold shape/length is automatically changed (to help torque etc).
A very similar feature exists on the IS200 too.
I wonder if it's possible this hesitation is "normal" because of this change ? Or maybe the valve that operates to change the inlet manifold at these revs isn't working smoothly or something ?
I don't know how you find all this stuff out Steve but it's impressive
It does sound possible and quite like what I am experiencing, I'm gonna do some tests this weekend looking into this side of things!
Cheers Bud
russelllinn
04-06-2016, 11:05 AM #21steviewevie It might just be a coincidence, but see page 49 of this section of the technical description of the 2JZ-GE engine. It seems that at 4300 rpm the inlet manifold shape/length is automatically changed (to help torque etc).
A very similar feature exists on the IS200 too.
I wonder if it's possible this hesitation is "normal" because of this change ? Or maybe the valve that operates to change the inlet manifold at these revs isn't working smoothly or something ?
I don't know how you find all this stuff out Steve but it's impressive
It does sound possible and quite like what I am experiencing, I'm gonna do some tests this weekend looking into this side of things!
Cheers Bud
07-06-2016, 06:29 AM
ECT PWR disabled and gears selected 4 and 5 - There is continual power in rev range until circa 4.5k rpm and then there is about 2 second hesitation in power - there is no speed loss, but no power increase. The power then continues through to red line on rev range in both gears. I did not notice power hesitation in gears 2 and 3.
ECT PWR enabled - There is continual power thorugh rev range is all available gears and I did not notice any power hesitation.
alamkhan3980
07-06-2016, 06:29 AM #22I have been driving my IS300 this weekend and found the following whilst using e-shift gear selection.
ECT PWR disabled and gears selected 4 and 5 - There is continual power in rev range until circa 4.5k rpm and then there is about 2 second hesitation in power - there is no speed loss, but no power increase. The power then continues through to red line on rev range in both gears. I did not notice power hesitation in gears 2 and 3.
ECT PWR enabled - There is continual power thorugh rev range is all available gears and I did not notice any power hesitation.
07-06-2016, 06:37 AM
alamkhan3980 I have been driving my IS300 this weekend and found the following whilst using e-shift gear selection.
ECT PWR disabled and gears selected 4 and 5 - There is continual power in rev range until circa 4.5k rpm and then there is about 2 second hesitation in power - there is no speed loss, but no power increase. The power then continues through to red line on rev range in both gears. I did not notice power hesitation in gears 2 and 3.
ECT PWR enabled - There is continual power thorugh rev range is all available gears and I did not notice any power hesitation.
That sounds interesting, I am going to go and try it again and see, it may be the hesitation that I am noticing and confusing for power loss, mainly because the K&N makes quite a noise so the sound changes.
When you have the ECT PWR enabled is that with the light on the dash on?
thanks for your help bud :thumbup1:
russelllinn
07-06-2016, 06:37 AM #23alamkhan3980 I have been driving my IS300 this weekend and found the following whilst using e-shift gear selection.
ECT PWR disabled and gears selected 4 and 5 - There is continual power in rev range until circa 4.5k rpm and then there is about 2 second hesitation in power - there is no speed loss, but no power increase. The power then continues through to red line on rev range in both gears. I did not notice power hesitation in gears 2 and 3.
ECT PWR enabled - There is continual power thorugh rev range is all available gears and I did not notice any power hesitation.
That sounds interesting, I am going to go and try it again and see, it may be the hesitation that I am noticing and confusing for power loss, mainly because the K&N makes quite a noise so the sound changes.
When you have the ECT PWR enabled is that with the light on the dash on?
thanks for your help bud :thumbup1:
07-06-2016, 07:06 AM
alamkhan3980 When ECT PWR is enabled, it lights up on the dash.
cheers bro, i'll try this later.
russelllinn
07-06-2016, 07:06 AM #25alamkhan3980 When ECT PWR is enabled, it lights up on the dash.
cheers bro, i'll try this later.
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