Normal.
Sluggish Throttle
Thread Starter
Intermediate
Joined: Aug 2004
Posts: 27
Likes: 0
Sluggish Throttle
I purchased a c6 3LT used with 37k miles about 2 months ago. It has an LS2 engine, but the throttle appears sluggish. If I mash on the gas pedel from idle in neutral there is a delay before the engine revs. If I step on the gas pedel slowly there seems to be no delay. Am I making sense? Is this common? Is there a fix?
Team Owner
Joined: Sep 2000
Posts: 25,029
Likes: 2,719
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Maybe normal, maybe not.
How sluggish is sluggish?
I'd try to find another similar C6 (engine and transmission) and let the owner blip his throttle a few times and then let him try yours. That way, he won't be worried about you abusing his engine.
IIRC, there is a soft rev limiter at about 4,000 rpm when in neutral but shouldn't have any effect coming off idle.
Be sure both engines are warmed up before testing, and Good Luck.
How sluggish is sluggish?
I'd try to find another similar C6 (engine and transmission) and let the owner blip his throttle a few times and then let him try yours. That way, he won't be worried about you abusing his engine.
IIRC, there is a soft rev limiter at about 4,000 rpm when in neutral but shouldn't have any effect coming off idle.
Be sure both engines are warmed up before testing, and Good Luck.
Former Vendor
Joined: Aug 2014
Posts: 244
Likes: 3
From: West Chester PA
I purchased a c6 3LT used with 37k miles about 2 months ago. It has an LS2 engine, but the throttle appears sluggish. If I mash on the gas pedel from idle in neutral there is a delay before the engine revs. If I step on the gas pedel slowly there seems to be no delay. Am I making sense? Is this common? Is there a fix?
If you're interested in having your Corvette tuned, please feel free to send me a PM or call the number in my signature. We're located in South-East PA (West Chester). I'd love to earn your business!
-Shane
Tech Contributor
Joined: Oct 1999
Posts: 41,066
Likes: 9,834
From: Charlotte, NC (formerly Endicott, NY)
I purchased a c6 3LT used with 37k miles about 2 months ago. It has an LS2 engine, but the throttle appears sluggish. If I mash on the gas pedel from idle in neutral there is a delay before the engine revs. If I step on the gas pedel slowly there seems to be no delay. Am I making sense? Is this common? Is there a fix?
Bill
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
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
Former Vendor
Joined: Nov 2005
Posts: 11,792
Likes: 255
From: Ossining New York
St. Jude Donor '07-'08-'09-'10-'12-'13-'14
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I had Chucks tune and COW BOOSTER in my 06 Coupe and he added the COW Booster to my wife's 11 Grand Sport Vert.
The throttle response improvement in BOTH cars is phenomenal! You will NO LONGER complain about a LAZY throttle!
The tune in the 06 turned it into a beast!
Bill Curlee
The throttle response improvement in BOTH cars is phenomenal! You will NO LONGER complain about a LAZY throttle!
The tune in the 06 turned it into a beast!
Bill Curlee