Corvette bucking when pushing the pedal
Thread Starter
Racer
Joined: Jun 2011
Posts: 274
Likes: 0
From: Montreal QC
Corvette bucking when pushing the pedal
Here's the story. Got my engine tuned 2 weeks ago ( 3k miles LS2 with vortech old-school s/c setup). I pushed the car hard for 3-4 runs on the street. Then i shifted the 5th gear and had a lack of power and check engine light came on flashing... I made about a mile without pressing the pedal or almost. i parked the car. Plugged my obd2 and saw it was cylinder 5 missfire. Put off the sparkplug, it was broke as f**k. The pin was almost soldered to the element, ceramic coating was missing part on it. Seems to me like a pre-ignition or something like this. I bought a new sparkplug and tried my best to gap it the 0.035'' like my tuner did on all others. Erase all codes. Then, i drove about 5 miles, car was running fine when daily driving, no engine code came up but at the moment im giving fuel more than 20% throttle, its bucking like a speedcut limiter.
Any ideas??? Damaged parts?? injector??
Thanks,
kevin
Any ideas??? Damaged parts?? injector??
Thanks,
kevin
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Pistons don't just hit the proper spark plugs. Maybe a broken piece of the piston hit the plug.
Try to find someone with a bore scope and take a look into the cylinder. You might be pulling the intake and head in your near future.
Try to find someone with a bore scope and take a look into the cylinder. You might be pulling the intake and head in your near future.
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
You my friend have a serious Cyl 5 issue. Look at the valve spring and see if its broken! I agree. Time to do some inside the cylinder looking. Home Depot sells a nice and affordable bore scope.
Give that a try!
Give that a try!
