SuperChip Gone Wrong!!!

[blue2ndgen]

So my buddy let me have a superchip that he got with a 2nd gen mtx. He didnt use it when he got the car so he gave it to me. Neither of us know what it was exactly tuned for. So I decided to put it in my car last night to see if it would at least raise my redline or my idle. So I put it in and started my car up, the idle seemed fine and everything seemed normal so I went for a cruise. I didnt bring it pass 5 grand yet.

I then pulled over to see if it would go past 7,300. I came to a stop and pushed in the clutch and reved it up slowly to about 6 and then a little harder. It went past 7.000 right up to about 8 and then i heard a couple like cracks/pops kinda like it back fired but not to loud. I let off and it idled a little rough after that. I tried to pull it out of gear to put it in nuetral but it was really hard to pull out of gear. I turned off the car checked everything under hood and under the car everthing looked ok. I got back in pulled out the chip and started it. it still ran rough and was really hard to get in gear.

I forced it in gear and took off slowly it was hard to shift all through the gears. I drove it home slowly and didnt noticed much problem with the engine, but then again i didnt drive hard. when I got home it was still running rough and vibrating more than normal. I just replaced the rod bearings about 300-400 miles ago.
I dont understand why the clutch or tranny would have anything to do with it if i didnt let out of the clutch when i reved it. PLEASE HELP, ANYTHING WOULD BE APPRECIATED ASAP.

 

[1995mtxsho]

DUDE! You should never-ever-ever try for redline while not in gear!
About your noise and trouble getting it into gear, I would first think clutch.

The difference in the way the car runs could be due to confusing it by using the chip and forcing it to readjust back.

I would say you fragged some fingers or maybe a strap on the pressure plate.
If the clutch doesnt fully disengage it can make it hard to go into gear.

Look there first, good thing you have one coming.... maybe.

 

[blue2ndgen]

I guess I just dont understand how the clutch could be damaged if its not really being used. Do you think I should disconnect the battery to let it go back to stock parameters?

 

[1995mtxsho]

By what you wrote it sounded like you were holding in the clutch while reving it.
If thats the case the PP fingers are under tension by the TOB and you spun it up to 7000+ RPM... its connected even more than with the clutch let out. I am no expert, but thats what I would check first.
Reving that high with no load can't be good on the rod bearings either.
Others will comment I'm sure.

 

[jedhead]

I guess I just dont understand how the clutch could be damaged if its not really being used. Do you think I should disconnect the battery to let it go back to stock parameters?

You pushed in the clutch, therefore the clutch is used. You spun the throwout bearing to 8000rpm while it was getting the most stress from the pressure plate. You most likely dusted your bearing, the fingers on the pressure plate or both. If you have no idea what the chip is tuned for you can end up running your engine too lean and do some more damage. Or the timing is too aggressive for the gas you have in your tank and get detonation.

Bob

 

[blue2ndgen]

Ya I realalize it was pretty stupid now. What do you suggest I do now? I was thinking of running a cylinder balance test, I dont know if that would tell me anything. Can that damage to the clutch cause the idle to be rough and the engine to shake.This is prob a stupid question but what is detonation? Also I was running 92 octane.

 

[jedhead]

Ya I realalize it was pretty stupid now. What do you suggest I do now?

I would check the clutch, pressure plate and throwout bearing.

I was thinking of running a cylinder balance test, I dont know if that would tell me anything. Can that damage to the clutch cause the idle to be rough and the engine to shake.

If the pressure plate fingers are missing then it is no longer balanced and will cause shaking to the engine. Stop running the engine before you cause more damage

This is prob a stupid question but what is detonation? Also I was running 92 octane.

Detonation is also called pinging. When the fuel/air mixture in the combustion chamber burns before the spark from the spark plugs, that is detonation. Severe detonation will make holes in the top of the piston. Too lean fuel mixtures is one common cause for detonation.

Bob

 

[blue2ndgen]

Do you think from what I have told you that I have caused damage to the engine as well as the clutch. Do I have to pull the tranny to check the clutch out? I m not very inclined when it comes to clutches and transmission obviously. I do have a spec stage II on the way. Should I wait to install that before I rip everything apart? thanks

 

[stangeater]

Good luck. I'd also disconnect the battery and let the computer reset itself.

 

[AREA 91]

My guess would be that the engine is fine, and the clutch is junk. This is coming from someone that DESTROYED a SHO NUT Heavy Duty Pressure Plate at the Indy Convention.

 

[blue2ndgen]

My guess would be that the engine is fine, and the clutch is junk. This is coming from someone that DESTROYED a SHO NUT Heavy Duty Pressure Plate at the Indy Convention.

and how did you do that?

 

[AREA 91]

Downshifted into second at 5000RPM. Then, BOOM!!!

 

[blue2ndgen]

Downshifted into second at 5000RPM. Then, BOOM!!!

But nothing happened to your engine?

 

[Black '93]

Ya I realalize it was pretty stupid now. What do you suggest I do now? I was thinking of running a cylinder balance test, I dont know if that would tell me anything. Can that damage to the clutch cause the idle to be rough and the engine to shake.This is prob a stupid question but what is detonation? Also I was running 92 octane.

Next time you want to see how high it revs, do it while driving. You don't even know how bad that is for your engine! I feel bad reving my ATX past 3500. Yeah, and when you put a chip in like that, you should drive at least a half hour or so to make sure that it runs good with no CEL before beating on it. Disconnect the battery and reset your idle, then drive it with the chip to see how it is. If it's bad, do the same thing but put in the stock chip. And don't ever rev that thing up in nuetral like that again! Your lucky you didn't seriously f*ck something up.

 

[blue2ndgen]

Next time you want to see how high it revs, do it while driving. You don't even know how bad that is for your engine! I feel bad reving my ATX past 3500. Yeah, and when you put a chip in like that, you should drive at least a half hour or so to make sure that it runs good with no CEL before beating on it. Disconnect the battery and reset your idle, then drive it with the chip to see how it is. If it's bad, do the same thing but put in the stock chip. And don't ever rev that thing up in nuetral like that again! Your lucky you didn't seriously f*ck something up.

Ya I realize that now. I just thought if something was gonna f**k up it would be better sitting still then flying down the road; And I know people that have done that dozens of times without a problem. But the point is if I thought something was gonna f**k up I shouldnt have done it at all or put a chip in thats not tuned for my car. I did let it run for about 15 minutes before I reved it up, it didnt throw any codes and ran like stock. Also for the record I didnt beat on it besides that one rev. I kept it below 3,000 other than that.

 

[blue2ndgen]

If reving your engine is so bad while not in gear (not that I do it all the time) then what are you suppose to do at the dragstrip? Besides the fact that we have traction issues being fwd and no lowend torque.

 

[jedhead]

When you are at drag strip, you just have to count on something breaking because you are stressing your drivetrain. I won't take my car to the strip because what ever time I might get is not worth the risk of damaging my car. You abuse your car you will pay for the abuse. Many years ago my brother and I had a bracket car. We was always working on the car.

Bob

 

[AREA 91]

:
Originally Posted by AREA 91
Downshifted into second at 5000RPM. Then, BOOM!!!

But nothing happened to your engine?


Nope, engine is fine. I have bounced the factory rev lilmiter at 7300 many, many times, with no ill effects. I never did it with the clutch pushed in, though.

I have also bounced 7800 many times with the plus with no ill effects. Trapping 107mph in at the strip results in the rev limiter being hit through the traps.

FWIW, Josh T. told me to raise it to 8000.

 

[SuperHO]

If reving your engine is so bad while not in gear (not that I do it all the time) then what are you suppose to do at the dragstrip? Besides the fact that we have traction issues being fwd and no lowend torque.

If you're revving past 2500rpms at the dragstrip, you're either running slicks or spinning a LOT. I've always granny launched, spun and STILL got crappy 60ft times.

 

[blue2ndgen]

When you are at drag strip, you just have to count on something breaking because you are stressing your drivetrain. I won't take my car to the strip because what ever time I might get is not worth the risk of damaging my car. You abuse your car you will pay for the abuse. Many years ago my brother and I had a bracket car. We was always working on the car.

Bob

I totaly agree with you. That's why I won't take my car to the track, atleast untill I get a quaife and a clutch.