misfiring under a load?
Thread Starter
Racer
Joined: Feb 2006
Posts: 366
Likes: 0
From: Loxley alabama
misfiring under a load?
here is exactly what is going on. the car runs fine at all times idle,WOT,city driving, ect...except in overdrive at low rpms..1200-1600 if i lightly press the gas is starts busting up. sometimes pretty bad, sometimes you can barely notice.(doesnt matter engine temp).. it hasnt thrown a code yet. i first changed the plugs and plug wires with no luck. then i installed new o2 sensors. no luck there either. any suggestions?
Drifting
Joined: Jan 2000
Posts: 1,660
Likes: 9
From: Charlotte, NC
Just spitballing here, but maybe it could be one of your coil packs or injectors.
I would try running a bottle of Techron fuel injector cleaner through your gas tank first, since that is easy to do and only costs about $7.
And you buying premium fuel? Curious if someone from the board with a scanner is near you and could check your fuel trims under this low rpm scenario to see what is happening.
I would try running a bottle of Techron fuel injector cleaner through your gas tank first, since that is easy to do and only costs about $7.
And you buying premium fuel? Curious if someone from the board with a scanner is near you and could check your fuel trims under this low rpm scenario to see what is happening.
Thread Starter
Racer
Joined: Feb 2006
Posts: 366
Likes: 0
From: Loxley alabama
no codes as of now, been a week... actually i cleaned and oiled my k&n , so i was considering it to be a bad MAF. i do beleive however that i let it dry enough. also was running 100 octane the same day it started, (nothing new, i do everytime i go to the track i mix a 100 octane.) i went to the track, made one pass, left and drove around town all day. about 70 miles later it developed the misfire.
Thread Starter
Racer
Joined: Feb 2006
Posts: 366
Likes: 0
From: Loxley alabama
well i replaced the fuel filter/regulator. it was definitly clogged up somewhat. when i installed and cranked the car again i was getting the full 58 psi. instead of the previous 50 psi. also the pressure is still bleeding off to 0 psi, but now it is taking an hour to do so instead of 15 mins. the car is still misfiring under low rpm load. i assume the pump may be bad, a bad injector, or possibly the check valve between the tanks...however i dont believe the bad check valve would cause the misfire/studder.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Racer
Joined: Feb 2006
Posts: 366
Likes: 0
From: Loxley alabama
