HELP! accidental overev!
 

So I was on the interstate last night as I got excited that I finally hit 1,000mi and could wind my engine out for the first time. I am not new to driving a manual all my previous cars were a manual. I was in 4th going all out, i shifted to 3rd instead of 5th and last tach reading i saw was 8500 rpm and i quickly double clutched and shifted to 6th. Has this happened to anyone? what should I check for? Im scared to death that I bent a valve or messed something up..... :(:cry:

pls guide me on what to do next THANKS!

did anything happen after you did that? or are you just scared of the future

nothing happened I babied the car home. no abnormal noises so far but was freaked out atm so i just went online and started searching on what to do.. any advice?

you should be fine, it's happened to me before but going from 3rd to 2nd too early. just don't make a habit out of it :paddle:

U hit 8500 Rpms too???lol for all I know it went over 9k

Are people seriously this anal about their car? So you fucked up a shift.... happens to a ton of people. Check engine light? Then keep driving, you're fine.

FYI, there's tuned people with redlines at 8k with stock internals. It's just not something you want to do on a consistent basis. I think mine is set at a 7600 rpm redline because the power gain any higher is negligible according to my tuner.

I get it bro I'm just being paranoid since I was going atleast 110+ on 4th that would've easily been over 9k in 3rd . Since this is my first bnew car I just got concerned. Thanks anyway hopefully it's nothing

I revved 3rd to red line and dumped the clutch and floored it when I shifted, while missing 4th and putting in 2nd. You're fine.

I appreciate the input man makes me feel better about the situation lol

If you over rev and float a valve enough that it hits a piston, you would know it immediately. It's not an issue that'll show up days or weeks later.

Like others have said, don't make a habit of this and you'll be 100% fine!

trust me, this will never happen again! Ive been driving a manual since I was 15 and never have I experienced this till last night. If I did float a valve and it did hit a piston what would I have experienced?

You were double-clutching when you should have been granny shifting.

Wondering how you were going 110+ when 4th maxes out at 106 on redline???

Either way was safe... He was on a public interstate. :bonk:

Idk my exact speed when it happened. I was paying attention to the road more than the speedo. Regardless of how fast I was going i saw >8500 on the tach :/

Option 1:
Pull the motor, pull the heads, inspect everything.

Option 2:
Do nothing.

Not sure what you are looking for us to tell you? Whether the car seems fine or is acting up, the above are pretty much your only two options regardless. If it hit 8500rpm under minimal load, I wouldn't be too concerned about it personally. Only you know things like if you let the clutch all the way out, how fast you were actually going, etc.

HELP! accidental overev!
 

I'm pretty sure the clutch was out all the way for a sec or half a sec max. I was at 7400 when I accidentally down shifted into 3rd. Would a compression/leak down do anything for me as far has piston head damage and bent valves?
Man I'm paranoid as fuck

If everything feels fine, you're probably fine. Aside from the balance of the internals, the only issue I can see that prevents higher revs is stuff like valve float causing the piston to contact the valves. Not sure if this is even an issue on our cars or not.

In short, if everything seems fine, you're probably okay. Not much you can do to inspect without a LOT of work that's probably not worth is. ECU most likely already recorded the over-rev as well.

Lastly, I suggest you learn pronated/neutral/supinated hand position shifting instead of "fake gated shifting." You'll be much less likely to miss a shift that way.

HELP! accidental overev!
 

@aznatama Thanks for the advice! Is there anyway to reset the Ecu to erase that over rev log? Disconnect battery maybe?

I don't know about the 86's ECU, or if it even has an overrev counter. However, in cars that DO have the counter, no, it is not generally resettable unless hooked up to a computer. I guess I wasn't completely clear, but I meant that IF the ecu has a counter, it'll likely been tripped already.

First post here :burnrubber: It happened to me two days ago on the track. It was my first trackday, second turn of the day. The main straight finishes almost exactly at the end of 4th gear. I'm very used to downshift to decelerate on street, and therefore I've downshifted to 3rd when I was barely starting to brake. Revvs jumped over 8.5k rpms. I've changed asap to neutral, but a good second passed before I've corrected.
The car seems to be fine, I've babied it for 2 full laps, listening to sounds etc... Since the car was pulling fine I've pushed and I've attained my record lap just 5 minutes after the miss shift.
It's however 2 nights that I can't sleep: I really love my car and I'm worried it will result in a major engine failure sooner or later.
Video:
https://vid.me/G2cJ

You would be that guy to post this. Is the cat driveable? Check the block.

If i time my shift perfectly i see 107 on the speedo :D

Usually, not always but usually if you are going to cause damage in an over rev it happens right away. With a one off situation I would not worry since the car is running fine. There is really nothing you can do now since if you did cause an issue th damage is already done. Very unlikely you did though so go take a nap and stop obsessing about it.

Omg guys I put 87 octane fuel in my car! What should I do :(

Give up on life, the car is totalled. You should just give it to me.

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I gotta say, if you were doing 110 on an interstate, I really don't give a damn what kind of shape your car is in now.

I've just seen too much asshattery on the interstates lately to have much pity.

At this point you've voided any notion that anyone should care what you did. 110 in unreasonably fast to be going on a public road.

It's possible that the valves did touch the pistons ever so slightly, in which case the pistons would be slightly work hardened and if stressed in the future, may shatter.

Also, the highest RPM ever reached is logged by the ECU, apparently. In this case, good luck with any future engine warranty claims.

My sympathy-o-meter didn't hit the redline reading the original post. In fact, it stalled. Real men screw up their 110mph upshifts on the track, not on public roads.

1 - Dont believe anything someone tells you on the internet (That includes me).

2 - An overrev condition will usually over stress components such as rod ends, pistons, or rocker arms.
just because nothing broke it doesnt mean that components werent overstressed.
You dont know until something breaks.

3 - change the oil, cut open the filter, look for debris. If no extra debris, just drive it more carefully and enjoy.

Once you realize that your car really is just a tool (like a hammer) you'll quit worrying and swing the damn thing.
If you break it, youll buy new handle or youll pitch it and buy a whole new one.

I read the first post and then looked for this comment.
:lol:

maybe rpm data is logged somwhere but using techstream that dealer have it does not appear to be able to access that data. All log data in ecu that is accessable via techstream is erased on ecu reset ie poer removal, even before a reset no max rpm data is accessable. other stuff like dtc codes time since reset time since tdc actice is accessable but is also erased on reset.

dealers have tried to bluff guys, but they were unable to produce log evidence.
they may still win as their techs\engineers will analyse the failed components and they may gain enough from that to determine it was an overrev, like dents in piston crowns. or bent valves ect

Drove the car like I stole it, two days after I got it! No issues whatsoever!