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Old Feb 16, 2004 | 11:48 AM
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From: Myrtle Beach
Default Engine acted strange

Like the thread title says, some weird things happened on the way home, and I am trying to figure out what may be the cause, so any input is really appreciated.

On the way home (about a 15 mile trip) at about the halfway mark the engine seemed to rev up for no real apparant reason, I have a 96 dx (manual) and I was not giving it any extra gas, I was probably going around 45mph at the time. Because I have a DX, I have no Tach, so I do not really know how high it was revving up, it wasn't terribly high, but deffinetly noticeable. I pulled to the side of the road and put the car in neutral, and it continued to rev at a constant level (like I said, I can't tell you what rpm it was exactly).

I killed the engine and restarted it, and it was still running at high in idle, so I popped the hood and checked my fluids, since I had the oil changed recently, and everything was okay. The temperature of the engine was where it normally is, so I don't THINK that was the problem.

The only two things that have crossed my mind so far are maybe the throttle was stuck down a little bit, but I honestly don't think it was, although I don't remember now, when looking back if I had really tryed to feather it much.. and the other thing was I was behind a semi and it was fairly dusty because there is a lot of roadwork, and maybe some dust got through the air filter, and I don't know if that would even do anything, but those are the only two things that crossed my mind.

Sorry the post was so long but, thats the story. Any input would really be appreciated.
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Old Feb 16, 2004 | 02:51 PM
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I'm confused here...
When you said it reved up for no real reason, do you mean while you were driving it picked up a few miles per hour by itself?
If so, do you have cruise control?

I doubt it's because you got dust in the engine. The air cleaner will pick that out for the most part.

How many miles are on the car? What mods are done to it? Tell about any other contributing factors you can think of.
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Old Feb 16, 2004 | 03:47 PM
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No, the speed did not increase, just the rate at which the engine was working, I was not getting any power from it or anything, its like the engine was in in 4th or 5th gear *which it was* but also like it was working extremly hard, the only mod the engine I have is a CAI, the car has slightly under 87k, it's somewhat hard for me to explain what happened because I do not know really, the engine was much louder than normal, and even when I pulled over and had the car in neutral just idling it was at a higher rpm than a regular idle, way above what 1500 is normal? I wish I had a tach because then I might have had a better idea maybe, but thats all the info I can give, for the most part.




**edit**

No cruise control
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Old Feb 16, 2004 | 04:00 PM
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Did it by chance throw a code???(did your CEL light come on?)

How high was it idleing. I know you won't know exactly, but was it about as high as it would be if the engine was dead cold? Is it still doing it or did it go away already?
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Old Feb 16, 2004 | 04:17 PM
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No check engine light came on. It was idleing probably twice the rate of normal maybe, it was very noticeable, and when I was driving I could feel it in the pedal somewhat, I had my music up kind of loud, but I could hear it faintly and feel it in the pedal, so I turned the music off and tryed to figure out wtf was going on. When I killed the engine it did not cut off as cleanly as usual, it kind of shook a little if that helps, not a huge shake or anything, but just slightly noticeable, like it didn't want to be turned off or something.
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Old Feb 16, 2004 | 05:02 PM
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Originally Posted by Buddah
No check engine light came on. It was idleing probably twice the rate of normal maybe, it was very noticeable, and when I was driving I could feel it in the pedal somewhat, I had my music up kind of loud, but I could hear it faintly and feel it in the pedal, so I turned the music off and tryed to figure out wtf was going on. When I killed the engine it did not cut off as cleanly as usual, it kind of shook a little if that helps, not a huge shake or anything, but just slightly noticeable, like it didn't want to be turned off or something.
your clutch is going
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Old Feb 16, 2004 | 05:53 PM
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I guess that really could be possibility, any ideas on how much a new clutch is, I don't really need a clutchmaster or anything, but if it is close to oem maybe I will go ahead and get one.
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Old Feb 16, 2004 | 06:16 PM
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couldnt this be a vacuum problem? I have heard of similar..
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Old Feb 16, 2004 | 07:01 PM
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I don't know what do you mean by vacuum problem, can you elaborate please?
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Old Feb 16, 2004 | 07:16 PM
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Sounds like a throttle body gasket or an intake manifold leak. Check all of your vacuum hoses, there's a diagram under your hood that maps out where everything is supposed to go.

My car did this when my evaporative purge solenoid hose came loose. It jumped up about 1000 RPMs and at first, I couldn't feel a difference in the way the car ran. It didn't throw codes in the ECU even though my A/F mixture was way off.

Other vac hoses to check... PCV and Brake Booster. Make sure they're not hardened, cracked, or punctured.

Good luck, I hope it's something simple.
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