Poppimg/missing/backfire
Thread Starter
Instructor
Joined: Jul 2015
Posts: 129
Likes: 0
From: pa
Poppimg/missing/backfire
!970 454 runs good when initially running...after it warms up, it runs like its missing it backfires and breaks up under acceleration. I thought it could be carburation, any ideas??
thanks
steve
thanks
steve
Melting Slicks
Joined: Feb 2006
Posts: 3,105
Likes: 96
From: Sunrise FL
What is the history of the car...this a new problem? Could be bad fuel, debris in carb, etc.
I would pull the plugs and look at them. Looking for mis fire on some cylinders, and overall color and condition.
I would pull the plugs and look at them. Looking for mis fire on some cylinders, and overall color and condition.
Thread Starter
Instructor
Joined: Jul 2015
Posts: 129
Likes: 0
From: pa
can initial timing be performed w/o finding tdc on cylinder 1?? I basically am working on this by myself and I feel the timing is all jacked up.....there is no vacuum line run from the hei to the carb so most likely that is part of the problem....I was just gonna hook up time light and adj timing to 0 degrees....would that be right??
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years
Joe Kucinski
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!
Michael S. Palmer
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
Pro
Joined: Jan 2016
Posts: 502
Likes: 103
From: Reno Nevada
can initial timing be performed w/o finding tdc on cylinder 1?? I basically am working on this by myself and I feel the timing is all jacked up.....there is no vacuum line run from the hei to the carb so most likely that is part of the problem....I was just gonna hook up time light and adj timing to 0 degrees....would that be right??
Setting it to 0 degrees would not be correct.
Not sure of the exact number off the top of my head, but something on the order of 34 degrees total timing is in the ball park. That is after distributor advance takes place. I am sure someone here has the exact tolerances or you can google them as well.
0 degrees would be way too retarded to operate correctly in almost any circumstance.
All of this is assuming you are running a standard distributor with a carb setup. If you have a computer setup, then follow those directions as they are likely different.
Last edited by 73racevette; Jun 8, 2016 at 04:12 PM.