dre_2ooo

Today as I was taking a "brisk" drive, i missed a shift from 1st to 2nd at aroung 5,500 rpms.... BUT the engine kept revving up (yes, my foot was OFF the gas) kinda like the throttle was stuck or something! So before I could react (human reaction time is soooo slow), it's MAXED out the tach (9k) and the buzzer is going off!!!!!! So it hits the fuel cut and settles down, I drive it into a parking lot and let it idle to cool, however the guage never goes above 1/2 way . The engine has about alittle over 2,000 miles. Everything is running fine, all the power is still there, and the fluid levels are all full...so my ? is.... could anything have gone wrong? Will this decrease the engine life (I broke it in properly for the first 1,500mi.)? Any help is appreciated, I know i sound kinda hysterical, but i'm just worried (already blew one engine, CAN'T blow another!). Oh ya, WHAT could've caused this?
Thanx

matt007

Missing shifts caused this. Go buy another engine. Give me yours.

Mykl

That happened to me once, the gas pedal got caught up by the floor matt. Scared the **** out of me.

The engine died not to long afterwards. It had a 180k on it so it was it's time to go anyway.

Dyre

Over reaving a rotary isnt too damaging- If its still running fine, i wouldnt be too concered, but you may want to check the compression, if your really parinoid-

Its probably fine-
Probably helped clean some of that nasty carbon out of there too

MAZMAN

thats why its good to have a rev limiter of some kind...

Suparslinc

I used to take my '84 to 10,000 rpm all the time.
Who says they wont do 60 in first gear? they will if you downshift hard enough!
Oh yeah that blew a fuse and most of my lights went out, but hey I don't think it hurts the engine too bad just so long as you don't keep it there any amount of time.

Racer 13B

I take my motor up to 10,000 rpm all the time also.
you'll be ok.

KNONFS

iTrader: (14)

On a second gen?

kliftin

wow. 10,000rpm . I dont have the ballz. Do it again. HE HE. I race shiftin at 8000rs. But taking it to 9000 or 10 wont do crap. My engine was also rebuilt 5000 miles ago and I abuse the hell out of it. I think its good for it every once in a wile. I heard that if you drive it like a granny it will fail prematurly.

RX7nCRX

They don't seem to really make that much power after 8k... only does it help taking it past in 1st and 2nd. I've had mine to 10k a few times, just showing off to a civic or something to blow his ear drums.

pp13bnos

iTrader: (1)

Man......you guys who spin stock ported engines to 10k, need to figure out, a stock engine is "safe" to 8500, peroid. After that, there is'nt enough oil pressure, clearance for bearings, and steal apex seals like to bounce. Not to mention, stationary gears are liable to break. (This rarely happens, but is very possiable.) If you get a stock apex seal with some milage on it to bounce, its only a matter of time before you put down some $$$ for a new motor.

A well built PP engine will see 10k, but a stock motor just is'nt designed to spin that high. CJ

dre_2ooo

thanks for all the input guys!
I tested the compression and its over 90psi/rotor. So that is good. No coolant was lost and oil is at "F" mark. WHEW! I was just worried b/c you hear all this talk (mostly on TII's) about how the fuel cut (limiter) makes it run soooo lean that it can cause damage. But could someone tell FOR SURE (ReTED, HAILERS?) if that engine speed will noticably reduce engine life or how much wear it puts on the seals, OR if its just the danger of things breaking at that instant....

rx7style

iTrader: (1)

I once took my 2nd gen N/A up to 10,000 RPM to see if the rev limiter had been removed with the modifications I did to my ECU, and all my belts flew off and got caught in the clutch fan. The car made a strange hissing noise for several minutes after that. Once I got the belts back on, I've put another 15,000KM on my car and not noticed any problems. You'll be fine -- rotaries kick *** when they are in good condition, especially a motor with 2000 miles on it!

Flamin' NOS

I heard that although the engine is capable of those sorts of short bursts, think about all the other **** that's spinning! The alternator can't take more than 9k I've heard and the tranny can go into shock and just start throwing things. Point is, it's downright stupid to rev that high, but it's a good way to find the next weakpoint in your setup.

Suparslinc

yeah, well I think there is a fine line between stupid and fun.
who needs fuel cut; my '84 just had to blow a fuse to tell me to slow down (much less damaging to the engine)!
actually, I was fibbing. I don't think it would rev that high it was probably more like 9600 rpm if my calculations were correct.

Green

wow.. 10k RPM... would scare the bejesus out of me...

haha in your face s2000s! 10k ! 9k is for WUSSES! hehe =)

classic_italian

I hit the rev-limiter on my 2nd gen at least once every drive and my motor was fine...........until 3 weeks of being in my posesion it blew( oh well it was fun while it lasted)

KNONFS

iTrader: (14)

There's some serious BS here or my car was built on a Monday!! While in gear I reach a fuel cut (or ignition cut) @ 8600 - 87000 rpms. I don't rev the car while idling, so I don't know how far will it go. On my previous engine, my father and I used to redline 1st, 2nd, 3rd weekly....it lasted 3 years due to corroded housings(damn mechanic) and a busted oil cooler line (long story)!

BTW - My car is a 91 NA

kliftin

What oil cooler line. The one going to the rotor. Thiers four. I superglood my broken one with lock tite. Going to fix when I go to work on the 17. Is that a prob.

SureShot

Kliftin, If that is typical of your repairs, you will be selling your car real cheap, real soon.

ZachSpazz

I accidentaly saw 8-9K in my TII but it wasn't under boost when it happened. It was quite the shock hearing the buzzer and engine revving that high in my newly bought car, in my old GXL I would hit redline about once in a week usually with a friend of mine who would start screaming at me to shift when I got closer and closer to 7K.

kliftin

Thats typical of my repairs when I dont have a dime to my name but need a ride to work when it comes. Its a risk I know but when it was running when I was working I baby it. Constintly checking car and giving oil changes. I also fixed interior. looks almost new. Its just I dont have another car at the moment. If anything happens between now and the 17th I will just work extra hard to fix it. It seems to be holding up and I always check oil pressure. Oil pressure will drop if it comes loose. But I dont know what it will drop to. Will a check engine light come on or some buzzer. It holds just under 30 when at idle.

rx7_ragtop

That line is for the oil metering pump. Run premix until you fix it right.

Brad

rxse7en

dre_2000,

Check to make sure your throttle cable is seated properly. Mine slipped out, snagged while shifting gears and threw me into the 9000rpm range. Car was fine. I slipped the cable back into the bracket and clamped it on. Like everyone else—scared the **** outta me when it happened!

B