Wouldnt Rev after starting

[KillxPoint]

Ok so heres an update. Went back out to the car 2 hours later. Started it up. Attempted to rev, wouldnt go above 2k RPM.

Drove for 30 minutes in normal and sport

parked the car, sat for 20 minutes. Started it up and it revved just fine right from startup, no driving whatsoever.


I decided to take a video and talk to my mechanic. I trust him more than any dealership as he tunes and takes these apart on the daily. He told me there a safety built in that will prevent the car from revving right from startup. Not entirely sure the conditions required to trigger it, however it seemed like that for whatever reason earlier today, those conditions were met, but after driving for 30 min and then resting for 20, it seems to have cleared those conditions. It now makes more sense why @KillxPoint seems to have the issue fixed with an ECU swap, however i'm curious if the root of the issue was actually a faulty sensor somewhere. But in the sense that it wasnt so faulty that it wasnt working, but more it was faulty enough to trigger this safety mode.

So my car still had the rev problem even after the ecu swap. I had it happen 4 times in a row once. Started the car in the morning everything was fine so i backed it out of the driveway then turned the car off. Got back in started it 10 mins later rev sluggish. Drove to a car show then the car rested for 1 hour Started it up sluggish. Drove to the store from car show stopped for 10 mins started it back up sluggish.

I just feel this issue is not consistent with all supras because not all people are saying they have this problem. Do me a favor and next time its feeling sluggish wait for 2 or 5 mins at idle and try again to see if its still sluggish. My toyota tech had my car idle for almost 2 hours with no power or sluggish as you describe it.

Sponsored

 

[Xxyion]

Yeah sorry i meant to say temporarily fixed with your ECU swap. I went back out to the car tonight and the issue isnt there anymore. I think it might have been a sensor issue but since your car is gone we'll never know. it would make sense considering my mechanic stating there is a safety mode which prevents over revving among other things when car is idle. And i'm just curious if maybe your car was in a constant state of Safety Mode when at first startup.

 

[KillxPoint]

Yeah sorry i meant to say temporarily fixed with your ECU swap. I went back out to the car tonight and the issue isnt there anymore. I think it might have been a sensor issue but since your car is gone we'll never know. it would make sense considering my mechanic stating there is a safety mode which prevents over revving among other things when car is idle. And i'm just curious if maybe your car was in a constant state of Safety Mode when at first startup.

I doubt it. The problem was never consistent. Sometimes it would happen every start then it would go away for a few starts then back again. I know at the end it was more frequent though. So your saying your car isnt doing it anymore? I do realize there is something with over reving for the first 30 secs but mine wouldnt rev even after idling for mins and from what the tech said a few hours. Next time your car does this see if your rev power comes back after 2 mins of idleing.

 

[KillxPoint]

Also toyota tech said there was never any codes being displayed. Everything was fine except no power until he put the car into drive but it would be sluggish for a sec or 2 before coming alive.

 

[Foxhound]

@Xxyion yeh it’s the same issue. I’ve actually had both cases happen, one where I rev and it just does not go above 1.5k rpm, the other where it gets stuck and then just shoots towards redline.

IMO I don’t think this is a Safety feature, that’s BS. If it was EVERY Supra should have the exact same engine protection feature and this thread wouldnot have spanned 27 pages of us trying to figure out what the hell is going on. Common sense dictates this is not normal.

When I was showing the Toyota Service manager my issue the other day, he thought it was just some “setting” that I have yet to figure out how to turn off. No dude it’s not a fucking setting, or a software feature, this is a manufacturer defect. He then gave me some story about how when the MR2 first dropped, it drove like shit, until he took it in to the dealer and they showed him how to turn off a bunch of settings to make it drive better. Fucking kidding me...

This issue is really starting to piss me off. I almost crashed the other day pulling out of a parking spot because of this damn issue.

 

[ArthurWick]

@Xxyion yeh it’s the same issue. I’ve actually had both cases happen, one where I rev and it just does not go above 1.5k rpm, the other where it gets stuck and then just shoots towards redline.

IMO I don’t think this is a Safety feature, that’s BS. If it was EVERY Supra should have the exact same engine protection feature and this thread wouldnot have spanned 27 pages of us trying to figure out what the hell is going on. Common sense dictates this is not normal.

When I was showing the Toyota Service manager my issue the other day, he thought it was just some “setting” that I have yet to figure out how to turn off. No dude it’s not a fucking setting, or a software feature, this is a manufacturer defect. He then gave me some story about how when the MR2 first dropped, it drove like shit, until he took it in to the dealer and they showed him how to turn off a bunch of settings to make it drive better. Fucking kidding me...

This issue is really starting to piss me off. I almost crashed the other day pulling out of a parking spot because of this damn issue.

Almost got Tboned because of this issue last summer. Opened a case with Toyota Canada and completed a Canada Transport defect complaint form.

I think you should all advise the NHTSA of this SAFETY issue. Otherwise dealers won’t do shit because they know nothing about our cars. They can try to BS, but when the NHTSA will ask what’s causing this when transmission is in D, Toyota will have to answer.

https://www.nhtsa.gov/

 

[KillxPoint]

Never experienced the car sluggish at a stop sign nor light but just after putting it into drive was when i felt little power for a few secs.

 

[ArthurWick]

Me neither, but did it when I pulled out of a parking, Supra almost stalled and incoming traffic had to hit their brakes because Supra didn’t want to move for a good 2-3 seconds.

 

[KillxPoint]

Im waiting for a big recall on these cars possibly.

 

[Xxyion]

Me neither, but did it when I pulled out of a parking, Supra almost stalled and incoming traffic had to hit their brakes because Supra didn’t want to move for a good 2-3 seconds.

thats actually not whats happening. i realized the slight sluggishness when taking off in drive was actually my own mind playing tricks on me and me not putting as much gas in as i normally do.

@KillxPoint this morning i had the rev issue. I let the car warm up for about 2-3 minutes without driving away or even putting the car in drive or reverse. Car stayed in Park with the Parking brake on the entire time. After 3 minutes the car revved just fine. No issue. Temp was a nice crisp 42 degrees this morning. Drove to where i needed to go. Car parked for 2 hours. Came back out started her up and did a rev. Car revved just fine. Temp outside was about 55 degrees.

I still think it might be a sensor issue. A sensor can cause a false negative without throwing any fault codes. This happens with computers all the time and i see it everyday (i work in IT). There has been plenty of times where i've seen a computer claim that its running all the scripts properly, but obviously the end result is incorrect.
Its very possible that in some of cars, the sensors are operating within normal spec, but all throwing false negatives. That wouldnt throw any fault codes but it would cause a system in the car to malfunction. Its just like losing Apple Carplay capability. Bluetooth and wifi could be working great, and the headunit isnt showing any errors, but carplay just wont work. That has been an issue for some people on this forum. Same deal.

Of course i'm talking like i know this as fact, but honestly i dont. It just seems to me the most obvious explanation. Does it mean theres a malfunction? Absolutely, however i also believe that the techs that worked on @KillxPoint car, were looking in the wrong area.

 

[Xxyion]

Never experienced the car sluggish at a stop sign nor light but just after putting it into drive was when i felt little power for a few secs.

yeah i am not getting this. Even after the lack of revs, putting it into drive gave me immediate power

 

[ArthurWick]

thats actually not whats happening. i realized the slight sluggishness when taking off in drive was actually my own mind playing tricks on me and me not putting as much gas in as i normally do.

@KillxPoint this morning i had the rev issue. I let the car warm up for about 2-3 minutes without driving away or even putting the car in drive or reverse. Car stayed in Park with the Parking brake on the entire time. After 3 minutes the car revved just fine. No issue. Temp was a nice crisp 42 degrees this morning. Drove to where i needed to go. Car parked for 2 hours. Came back out started her up and did a rev. Car revved just fine. Temp outside was about 55 degrees.

I still think it might be a sensor issue. A sensor can cause a false negative without throwing any fault codes. This happens with computers all the time and i see it everyday (i work in IT). There has been plenty of times where i've seen a computer claim that its running all the scripts properly, but obviously the end result is incorrect.
Its very possible that in some of cars, the sensors are operating within normal spec, but all throwing false negatives. That wouldnt throw any fault codes but it would cause a system in the car to malfunction. Its just like losing Apple Carplay capability. Bluetooth and wifi could be working great, and the headunit isnt showing any errors, but carplay just wont work. That has been an issue for some people on this forum. Same deal.

Of course i'm talking like i know this as fact, but honestly i dont. It just seems to me the most obvious explanation. Does it mean theres a malfunction? Absolutely, however i also believe that the techs that worked on @KillxPoint car, were looking in the wrong area.

It did on mine, car was sluggish after selecting D, almost like it ran on 3 cylinders and misfired, putting the pedal to the floor did nothing, almost stalled and rev were under 1000 rpm for a good 2 seconds and then power came back.

I don’t give a shit if the car won’t rev in P or N, but when in D I do!

 

[Xxyion]

It did on mine, car was sluggish after selecting D, almost like it ran on 3 cylinders and misfired, putting the pedal to the floor did nothing, almost stalled and rev were under 1000 rpm for a good 2 seconds and then power came back.

I don’t give a shit if the car won’t rev in P or N, but when in D I do!

wow that seems even more extreme than what me or Killx was experiencing. I'd definetly take it to a dealership at that point.

 

[KillxPoint]

Mine idled with no power for long periods of time, also radio screen would twitch along with the windshield wiper twitch which was fixed. The icing on the cake was the red paint had clear coat problems so thats why i decided to have toyota buy the car back. (They bought the car back because they couldnt fix the long periods of idle with no power)If the paint was good i would have kept the car untill toyota figured out how to fix my car.
Just seems odd to have so many electronic issues with the car. I wish mine was like the manual described no power for 30 secs but mine was different.

Just so inconsistent across all supra owners. Thats what makes me believe there might be a recall someday.

 

[ArthurWick]

wow that seems even more extreme than what me or Killx was experiencing. I'd definetly take it to a dealership at that point.

They don’t have a clue and we couldn’t make it happen at the dealer.

Happened to me twice in 5K miles. Felt like the car was not sure if 1st gear was engaged and took like 2-3 seconds to figure that out. My car is stored for the winter, but I plan to do some test in April to verify a few guesses I have about what’s causing this issue.

Sponsored