backfiring when trying to start.
Thread Starter
Racer
Joined: Jan 2010
Posts: 428
Likes: 1
From: San Antonio Texas
backfiring when trying to start.
Got a ls1, and it runs and idles great, but some times when I try to start it this is what happens "turn the key on.your hear the fuel pump kick in,crank it ,the motor trys to turn on,crank it again then POP POP(from each exhaust),crank it again and fires right up."what could it be i've checked everything.
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
Got a ls1, and it runs and idles great, but some times when I try to start it this is what happens "turn the key on.your hear the fuel pump kick in,crank it ,the motor trys to turn on,crank it again then POP POP(from each exhaust),crank it again and fires right up."what could it be i've checked everything.
Thread Starter
Racer
Joined: Jan 2010
Posts: 428
Likes: 1
From: San Antonio Texas
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
im assuming it is an injected engine??.....if so, you could have an injector leaking down or something in the computer delivering fuel at the wrong time....
if a cylinder fills wit fuel and dumps it into the exhaust while not on the firing stroke, this will ignite at start up and cause a pop or backfire and maybe even stall the engine
if a cylinder fills wit fuel and dumps it into the exhaust while not on the firing stroke, this will ignite at start up and cause a pop or backfire and maybe even stall the engine
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
