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Car breaks up at high RPM

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Old Aug 11, 2009 | 09:11 AM
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Default Car breaks up at high RPM

When I am on the gas the car break up about 4000 RPM or higher also when I am in overdrive it starts to break up a lil bit I am 100% unsure what it could be.


2000 Camaro Z28
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Old Aug 11, 2009 | 09:19 AM
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Could be that it needs a tune up.
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Old Aug 11, 2009 | 10:56 PM
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Originally Posted by TooLateVTEC
Could be that it needs a tune up.
nope tried that
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Old Aug 12, 2009 | 12:32 AM
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codes?
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Old Aug 12, 2009 | 08:20 AM
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maybe it was that shot of nitros you used at the track?
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Old Aug 12, 2009 | 08:23 AM
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Have you checked your plugs/wires? What about any SES codes? Have you cleaned the MAF recently? Check for vacuum leaks around the throttle body and manifold.
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Old Aug 12, 2009 | 09:36 AM
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Hook up a scanner and see what you get. I had a pending random missfire code before with no light on. I had a bunch of nastyness on my plugs and I changed them and I was good. But you may like mentioned before clean your MAF sensor and while your at it clean the tb and intake manifold.
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Old Aug 12, 2009 | 10:16 AM
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There are no codes, there is no nitrous on this car it is my friends car. I will hook up to it. Checked the plugs, how do you go about checking wires?



Thinking back the car DID have a random misfire code but I know for a fact as of right now it has no codes, but like I said I will rerun the scanner.
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Old Aug 12, 2009 | 10:45 AM
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Originally Posted by nitr0racing21
There are no codes, there is no nitrous on this car it is my friends car. I will hook up to it. Checked the plugs, how do you go about checking wires?



Thinking back the car DID have a random misfire code but I know for a fact as of right now it has no codes, but like I said I will rerun the scanner.
Theres realy no way of checking wires unless there was a set code for a certain cylinder. I would just go by the age and miles. Most likely though if it was a bad wire it would be miss fireing all the time since wires are either bad or good. If he's got headers they tend to lesson the life span cuz they burn them out.
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Old Aug 12, 2009 | 08:14 PM
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possibly a bad fuel pressure regulator mine did the same thing
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Old Aug 12, 2009 | 08:28 PM
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If none of the wires are burnt and theres no codes...I would get a fuel pressure gauge on it and check the FP.
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Old Aug 13, 2009 | 10:58 PM
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Originally Posted by nitr0racing21
There are no codes, there is no nitrous on this car it is my friends car. I will hook up to it. Checked the plugs, how do you go about checking wires?



Thinking back the car DID have a random misfire code but I know for a fact as of right now it has no codes, but like I said I will rerun the scanner.

You could try swapping your coils and wires with his
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Old Aug 14, 2009 | 10:59 AM
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fuel filter, air filter. just some suggestions, step back and start over again. fuel, air, spark sometimes you just have to start with the basics. good luck
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Old Aug 14, 2009 | 01:49 PM
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My car would do the same thing as the OP. After alot of headaches and and bending over the hood. I found that my lid elbow after the MAF was cracked and letting unmetered air into the system. At idle and normal driving it was unnoticable but at WOT that was a totally different ballgame. You could check that. Hope this helps.
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