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View Full Version : Unusual Misshift Results Please Help!


Korben007
12-28-2003, 09:21 AM
Hello everyone,
As you know I have been on the board along time. I have had my Celica for 4 years as of a week ago. I consider myself very capable of driving it and have done so for 4 years with no problems. Well last night I was accelerating on the freeway onramp. I redlined in third gear and was shifting into 4th, well it turn out to go in to second. I let the clutch out really fast. The revs jumped high not sure how high cause I had it back out of gear before i could look at the tach. No nasty sounds or anything. So I am coasting and the engine dies. I start it up again. Drive it off the exit and into a parking lot. Car is idling ruff. No smoke or anything under any RPM. No Oil light. Oil level is fine. I dont see any leaks. The engine sounds fine as soon as you rev it. I have had a previous check engine light from before so I cant say if the light is related to the misshift cause it was already there due to a bad second O2 sensor. So I reset the computer and the light stayed off for about 10-15min so i think if it was an enginge related problem it would be on sooner.
This is the unusual part. The clutch pedal has gone to hell its really spongy. If I start the car in gear with the clutch depressed it pushs the car so I know that the clutch in not disengaging. The clutch petal even got stuck down once. I cant shift the gear without RPM matching cause the clutch is not disengaging. The gears shift fine with the car off so I dont think something is wrong with the transmission itself. So I checked my plugs and coils and they smell a little hot but I dont know what coils are supposed to smell like or how to check them? My plugs are dirty they needed to be changed anyway. I drove the car around the block a little. The engine gets a buzzing vibration at about 3500-4000 RPM and up. The car with idle but die sometimes the engine sounds fine the valves are loud but they have always been loud I dont think anything is wrong there because my exhuast is so clean. The rough idle has a vibration to it almost like its under a load. So my guess is that the results of this misshift are something is destroyed in the clutch assembly rather then then engine? Any idea or thoughts would help very much? I am pulling the transmission tomorrow to look at the clutch to see whats up. I just hope my engine is ok, cause it sound fine reving it. Idles like its under a huge load and the drivetrain feels really bad when driving. The vibrations and buzzing are bad when the car in moving under load. I can feel it in the steering and the shifter. The power delivery of the car feels normal. I did not go into cams, not till I know more. I need help I cant figure this out?

Zensoku
12-28-2003, 10:12 AM
Are you running stock clutch? B/c 100000+miles you should have replaced it by now.. I'm 30000miles and my stock is really spongy as well. Best case scenario: your clutch is gone. Worst case: your head is messed up or your tranny. Best of luck.

2002GT_Celica
12-28-2003, 10:16 AM
Good luck, but I hate to break this to you, but going from redline in 3rd to 2nd is going to do a LOT more than mess up your clutch. Your head is gone, and I'm surprised the bottom end of the engine didn't go out as well, and there is probably some damage there as well.

My suggestion: take it to someone who knows what they're doing.

TypeSFanatik
12-28-2003, 10:28 AM
damn 130,000 miles + in 4 yrs your a champion. damn thats alot of driving

dx3162
12-28-2003, 10:37 AM
Sucks you blew it up, head is definitely gone, sounds similar to my misshift, however i must congradulate you on being able to drive a 00 for 130k before a misshift...

Korben007
12-28-2003, 11:21 AM
well its my second OEM clutch so I have changed it. I doubt I have head damage though because I started the car this morning and it sounds great. Its going to the shop in an hour to get a professional diagnosis I will keep you all updated. I dont think my revs went that high as i caught it right when i did it. The clutch just feels messed up this morning but I really think the engine is fine. No bad sounds at all when the car is not moving. The vibrations only come when the car is in motion.
Thanks
Rory

Korben007
12-28-2003, 11:21 AM
LOL I would rather buy a new tranny then a new engine anyway since I was planing on getting one soon anyhow.

Zensoku
12-28-2003, 01:10 PM
Your head is not gone. If it was gone you would know. Power loss and very very loud valve knocking would be the main signs. I'm sure you caught it b4 it had a chance to do any major damage.

But if unfortunately it is gone, there are alot of people selling their customs built heads (IE. here (http://www.newcelica.org/forums/showthread.php?s=&threadid=97875&highlight=head)) and since your getting the xs turbo you might as well make your engine low comp as well (ie. here (http://www.newcelica.org/forums/showthread.php?s=&threadid=104630&highlight=low) ).

2002GT_Celica
12-28-2003, 01:27 PM
Your clutch is fried more than likely as well. I thought about it after reading this post again and it reminds me of a problem that some of us Honda guys have with the H22. Sometimes when you engage the clutch at a higher RPM than stock (either through mis-shift or having the proper parts to rev an engine higher) a clutch assembly will literally self-destruct because it just can't handle the engine speed. This is a problem with stock clutches moreso than aftermarket clutches.

Your clutch is probably fried and that would explain the unresponsive behavior.

Tikked Again
12-28-2003, 04:36 PM
I would have a shop do a compression check to see if there was any damage to the valves or piston rings because of the sudden RPM jump (just to double check). If all the cylinder pressures are consistent after testing then your engine should be fine.

Littleguy
12-28-2003, 05:34 PM
It sounds to me like you bent some valves imo.

Luvin It
12-28-2003, 06:12 PM
Hey Korben007, I did the exact same thing about a month ago and sounds like you have the same symptoms as my car did. I went to a shop and they did the ECU/injector TSB to it and wasn

Korben007
12-29-2003, 12:51 AM
luvin I hear ya i reset the ecu and im not getting any engine codes so i guess i lucked out i think. I am gonna change the plugs and stuff though just cause i know i need too. I will know alot tomorrow when the transmission comes out.
Thanks for all teh info guys.
Later
Rory

SikGtS00
12-29-2003, 11:55 AM
Seems like this has happened to alot of people. I guess with the narrow shift gates of the 00 gts its almost bound to happen. Anyway, I did this exact same thing last week. Im having the exact same problems with mine. It goes into the shop tomorrow so hopefully its a clutch problem, i have 68000 on the stock clutch anyways. Its good to hear that people with the same problems after a misshift arent necessarily needing new cylinder heads.
Keep us up to date on whats going on.
-Griffin

Kendo
12-29-2003, 11:56 AM
Luvin It is correct on his description on the clutch problem. On my mis-shift my clutch pedal went to the floor and stayed there. Not sure why this happens as it is a hydraulic clutch.

When the clutch was pulled apart two of the three metal tabs that hold the clutch plate in place were bent resulting in the clutch being permanently locked with the flywheel. Luckily the flywheel surviced with no damage.

As for the engine light, it did not come on in my case, but I still ended up bending over half of my valves and trashing my oil pump. In this condition the car still ran okay but I would not call it a spirited ride.

FL Honda Stompr
12-29-2003, 12:29 PM
sounds like you may have bent a valve or something, but the car still runs and no oil leaks, my guess is minor head damage, get a compression check.

TurK
12-29-2003, 02:20 PM
man....you car is so fine too.........hope u get it fixed soon

SikGtS00
12-29-2003, 02:37 PM
Yeah, I would get a leak down and compression test done if I were you just to make sure that the engine is ok even if youre sure that its a clutch problem.

Korben007
01-02-2004, 08:48 PM
Bent a couple valves. Destroyed the clutch. I want to get an upgraded head since I am taking the whole thing off. So if anyone has a built head for sale let me know. I will let you guys know if anything else broke. I had one of the first batches of celica made so I guess i better be happy it lastest to 130,000 so far hehe!