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NEED HELP car is running rough

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Old Jul 9, 2008 | 01:17 PM
  #1  
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Default NEED HELP car is running rough

It's a 98, 42,000 mi., shorty headers and Z06 catbacks. I also changed plugs 18,000 mi. ago with ACDelco iridium #41-985.
I filled the tank up 4 days ago. It took about 10 gal.
I came home last night and as I was pulling in the garage I noticed it running rough. I checked it out last night and today and found nothing. There are no codes. It doesn't idle too bad, but when you rev it or put it in gear it gets pretty rough. There is also a sulfur like odor. I noticed when idling and holding my hand in front of the exhaust pipes the driver side had a much stronger pulsating feel than the passenger side.
That's all I can think to tell you. Let me know what you think.
Thanks
Rock
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Old Jul 9, 2008 | 01:32 PM
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sounds like you got a case of bad gas. what octane/brand do you use
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Old Jul 9, 2008 | 06:58 PM
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Originally Posted by Enemy
sounds like you got a case of bad gas. what octane/brand do you use
I hope that's what it is.
I use Chevron premium 93 octane.
Thanks for the reply.
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Old Jul 9, 2008 | 10:25 PM
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if the exhaust flow is weaker on the right side I'd concentrate on that side. the sulfur smell is telling me catalytic convertor. I don't know how prone these convertors are to clog.
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Old Jul 10, 2008 | 12:42 AM
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I think the cat converters are made to last quite a while(GOV'T spec), you may have put in some bad fuel. You could add some Techron to your fuel only a few bucks.
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