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10-31-01, 10:34 PM
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#1 (permalink)
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Guest
Posts: n/a
My Corvette(s):
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81 with rough idle
Thanks to all for your valuable feedback. I'll do a tune-up this weekend and will definitely take a look at the EGR. This is a very informative forum! You people really know your stuff!
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11-01-01, 03:27 AM
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#2 (permalink)
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Member
Join Date: Mar 2001
Location: Wichita, KS
Posts: 276
My Corvette(s):
Red on Red 1979 L-48
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Welcome to the forum.
Could be timing, plug wires, idle circuit in the carb, or a vacuum leak.
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11-01-01, 05:30 AM
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#3 (permalink)
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Member
Join Date: Jul 2001
Location: Auburndale, Florida
Posts: 6,231
My Corvette(s):
1969 Killer Shark
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Steve,
Welcome to CACC. Nice choice of cars.
This is a great place to get the latest information, products, and news about Corvettes at the home page, and stop here at the forum to share ideas, post questions, and help others.
The rough idle is actually a BIG question. If you do all the regular things, plus, wires, filters, tuning, timing, cap, rotor, vacuum line check, etc, and still have the problems, look very close at the EGR valve. As it goes bad it can cause a world of headaches. Several people here have run into this problem and sometimes only after doing everything else (which most cars need all the tune up stuff anyway) found the problem.
Keep us up to date of what you have done so we can throw our .02 in on the situation.
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11-01-01, 09:11 AM
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#4 (permalink)
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Administrator
Join Date: Oct 2000
Location: Amarillo, TEXAS
Posts: 7,786
My Corvette(s):
1981 & 2003 Anniversary Vert.
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Steve Two Tone ~ Welcome to The Corvette Action Center Community ~
As 69myway stated, CACC is your one stop Corvette Center. Great community here with lots of experience and help. I also invite you to visit The L81VetteRegistry for information specific to your L81 
Welcome aboard enjoy the ride 
__________________
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11-01-01, 02:12 PM
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#5 (permalink)
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Administrator
Join Date: Jun 2001
Location: Manassas, VA
Posts: 6,665
My Corvette(s):
71 Conv. (Sold) / 98 Pewter Coupe
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First of all welcome to the CAC! As has already been said, you've found the right place for Corvette information. We may not all know everything (at least not me anyhow) but no matter what you need to know, someone here will have the answer.
As for your problem, I guess you can see there are a host of possibilities of what's wrong. Click here to see a post that explained cleaning the EGR vavle incase you end up doing that.
__________________
- Eric
 "He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion." - Unknown
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11-01-01, 10:56 PM
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#6 (permalink)
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Member
Join Date: Jul 2001
Location: Whittier, California, USA
Posts: 513
My Corvette(s):
1975 Red on Black Coupe
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Hiya Steve two tone!!
Question: Manual or Automatic? 900 RPM idle is too fast regardless of the answer to this question. If it is an auto, 900 in gear or out? If you slow it down, the roughness will be worse. A good tune up is ALWAYS in order, unless you did one yourself, personally and recently.
After that . . . look for a vacuum leak . . .
Welcome to the forum.
Ron
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