Corvette still shakes at idle
Thread Starter
Advanced
Joined: Apr 2009
Posts: 69
Likes: 0
Corvette still shakes at idle
My corvette shakes slightly at idle. It also ocaisionaly has to turn over for a second before starting up. I have changed plugs and wires, and i changed the fuel filter. the fuel that came out of the old fuel filter was like mud. these did not solve the problems. Im wondering if the engine is starving for fuel so im going to check the fuel pressure at the fuel rail in the next couple days but im wondering if anyone else has any other ideas what it might be doing. There are no codes and no check engine light but "service vehicle soon" appears after it runs for a little while. I have an 02 conv. Thanks in advance
Thread Starter
Advanced
Joined: Apr 2009
Posts: 69
Likes: 0
yes its a pure stock car, and i wanna believe its normal and i hope its right but it didnt start doing it till about a month or two ago, but there is no noticeable affect on power so im thinking that your right. Im hoping anyway
Race Director
Joined: Dec 2002
Posts: 10,233
Likes: 21
From: Baltimore suburbs Maryland
How many miles? Try cleaning the throttle body, the MAF sensor (with MAF sensor cleaner) and run seafoam through it? As mentioned, the LS1 will shake a little. It's not gonna idle like a Lexus 
Melting Slicks
Joined: Jul 2007
Posts: 2,430
Likes: 1
From: Somewherebetweenhereandthere
Race Director
Joined: Dec 2002
Posts: 10,233
Likes: 21
From: Baltimore suburbs Maryland
Seafoam is like Top Down cleaner. Do a search here on Seafoam, plenty of information and write ups.
To clean throttle body-remove the intake bellows- put the key in "ignition" but don't start the car. Have someone floor the gas or jam a stick between the gas and your stick. This will open up the throttle plate. Buy throttle body cleaner and spray the crap out of the throttle body. Use an old tooth brush and scrub the inside.
To clean MAF sensor- while you have the MAF off to clean the throttle body and use MAF sensor cleaner and CAREFULLY spray the elements.
To clean throttle body-remove the intake bellows- put the key in "ignition" but don't start the car. Have someone floor the gas or jam a stick between the gas and your stick. This will open up the throttle plate. Buy throttle body cleaner and spray the crap out of the throttle body. Use an old tooth brush and scrub the inside.
To clean MAF sensor- while you have the MAF off to clean the throttle body and use MAF sensor cleaner and CAREFULLY spray the elements.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Burning Brakes
Joined: Jul 2004
Posts: 1,172
Likes: 71
From: MA
I would also check your coil packs (may need an ignition analyzer). Even though you changed your wires and plugs, it is also possibe that you didn't seat the wires or you have a bad plug/wire. You may need to "burp" the rubber boots. They fit tightly and if any air gets caught in there when the car warms it can cause the connectors temporarily walk off the plug/coil pack connector. Do a search on the forum and you will find others have had plug burp problems that caused idle problems. To insure that you have no air trapped you can use a small plasric wire tie inserted in the rubber boot when installing then. After installed just pull out the wire tie.
