engine shake
Racer
Joined: Apr 2005
Posts: 310
Likes: 1
From: Sterling Virginia
engine idle
FWIW i definitely noticed a difference in idle quality after changing plugs and wires (Magnecor's). At first it "trembled" quite a bit (low milage too) but was extremely smooth after changing plugs and wires. It trembles a little now, but not anything like it did.
Melting Slicks
Joined: Nov 2003
Posts: 2,898
Likes: 5
From: Plainfield, IL
I changed the plugs and wires hoping to smooth out the idle in my 29,000 mile 99. Ofcourse I have much lower miles than you but I noticed NO difference at all. Dont get your hopes up too much about smoothing it out after plug/wire change. Chances are it will do nothing for you as far as smoothness goes. How you are explaining is just how the LS1 engine idles. Its perfectly normal.
What guys are saying about the MAF could be worth it. Remove the MAF from your intake below. If your car still has the screen in place you will need to remove the 4 torx bits and disassemble the unit (still very easy only 3 parts to it). What I do is use a carb type cleaner or alcohol and slightly soak a couple q-tips and VERY gently wipe the sensors and metal bars. I then do the same process with dry Q-tips for a final cleaning. Make sure you are GENTLE!! you can actually see the dirt come off. Hope this helps.
JT
What guys are saying about the MAF could be worth it. Remove the MAF from your intake below. If your car still has the screen in place you will need to remove the 4 torx bits and disassemble the unit (still very easy only 3 parts to it). What I do is use a carb type cleaner or alcohol and slightly soak a couple q-tips and VERY gently wipe the sensors and metal bars. I then do the same process with dry Q-tips for a final cleaning. Make sure you are GENTLE!! you can actually see the dirt come off. Hope this helps.
JT
Thread Starter
Instructor
Joined: Dec 2005
Posts: 139
Likes: 0
From: Richmond virginia
thanks for the advice man! i am actually excited to get under the hood of my C5...i gave up working on fast cars 3 years ago, and finally am back into it. any books a manual recommendations?
Race Director
Joined: Dec 2002
Posts: 10,233
Likes: 21
From: Baltimore suburbs Maryland
With 70K miles, if those are the original plugs definately change them.
Oh yeah, with those miles you may want to seafoam the vette as well. I did that, then later down the road did the plugs and the idle smoothed out much better!
Oh yeah, with those miles you may want to seafoam the vette as well. I did that, then later down the road did the plugs and the idle smoothed out much better!
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 231
From: SoCal
Originally Posted by jers98vet
While you are changing the plugs, may I suggest cleaning your maf sensor as well. You can easily do it by spraying carb cleaner or electric contact cleaner. I have seen dirty maf sensors cause a rough idle but otherwise normal running conditions.
As far as the metal covers go, you'll find out what they are when youstart changing your plugs.
As far as the metal covers go, you'll find out what they are when youstart changing your plugs.
DH
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 231
From: SoCal
Originally Posted by JTS97Z28
should work fine. Just anything that wont leave a residue.
It says "NO RESIDUE" and I just bought some for upcoming brake job.....didn't want to have another can of crap on my work bench unless necessary
DH
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Burning Brakes
Joined: Jan 2005
Posts: 900
Likes: 0
From: New Bern NC
Bought a 97w/ 85k, tuned and replaced everything possible and it still has a little rough spot in it. Everyone including the dealership says it is the nature of the car. The car never reported a misfire. Enjoy the car as I do.
Rob
Rob
