C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

jumpy at light throttle

Old Mar 3, 2007 | 02:22 PM
  #1  
soccer794's Avatar
soccer794
Thread Starter
Racer
 
Joined: Jul 2004
Posts: 450
Likes: 0
From: Fredericksburg VA
Default jumpy at light throttle

Just installed my new 750 dp...wow I feel like I'm driving a whole new car. That being said, I can tell it still needs a little tweaking. If I'm on the throttle even a decent bit its fine, and if I'm completely off the throttle its fine, but if I'm just barely on the throttle its very "jumpy." Seems a little like a lean condition, but I need some advice. What should I check/adjust? Its on a 454 if that matters.
Reply
Old Mar 3, 2007 | 07:41 PM
  #2  
soccer794's Avatar
soccer794
Thread Starter
Racer
 
Joined: Jul 2004
Posts: 450
Likes: 0
From: Fredericksburg VA
Default

ttt
Reply
Old Mar 3, 2007 | 09:52 PM
  #3  
marshrat99's Avatar
marshrat99
Melting Slicks
15 Year Member
 
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Default

Fuel starvation on light throttle? Have you checked the float levels? How about the choke, is it opening up all the way? We need more info.
Reply
Old Mar 3, 2007 | 11:01 PM
  #4  
Thinpockets's Avatar
Thinpockets
Racer
10 Year Member
 
Joined: May 2006
Posts: 264
Likes: 0
From: Fort Myers, Fl / St. Paul, Mn
Default

Make sure that the accelerator pump linkage is tight with no slop. If the throttle plates start to open before it gets a squirt it will hesitate. It may be just a little bit out but when it starts sucking air it needs fuel also. If you slam it to the floor it makes little difference but if you ease it down it will stutter.
Reply
Old Mar 4, 2007 | 10:29 AM
  #5  
soccer794's Avatar
soccer794
Thread Starter
Racer
 
Joined: Jul 2004
Posts: 450
Likes: 0
From: Fredericksburg VA
Default

Originally Posted by marshrat99
Fuel starvation on light throttle? Have you checked the float levels? How about the choke, is it opening up all the way? We need more info.
Checked the float levels and adjusted them, no choke. I assume its fuel starvation, but I'm not sure. I just know it kind of "bucks".
Reply
Old Mar 4, 2007 | 10:48 AM
  #6  
76 sting's Avatar
76 sting
Pro
 
Joined: Jun 2004
Posts: 700
Likes: 0
From: Lantana TX
Default

Originally Posted by soccer794
Checked the float levels and adjusted them, no choke. I assume its fuel starvation, but I'm not sure. I just know it kind of "bucks".
Check you timing. I had the same issue, but a little more than jumpy and re adj the timing and went away 100%

Reply

Get notified of new replies

To jumpy at light throttle



Thread Tools
Search this Thread

All times are GMT -4. The time now is 12:07 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE