P0303 needing help!
Thread Starter
Staging Lane
Joined: May 2018
Posts: 64
Likes: 0
P0303 needing help! Hi,
First off, 2010 Camaro SS, auto, 35,000 miles. Engine was running perfect, but I had a small gas leak from when I flipped the fuel rail ( I thought I'de be good not removing the bracket that was in the back and it bent the fuel rail). So I go and put on some JEGS fuel rails and converted to -6AN. Started it up and started spitting and clunking. Then just died. Now I can't even get the thing to turn over! Engine is locked up.
Can someone please offer some advice? Or maybe have this happen to them?
I pulled the code P0303, which I know that is an error code for a misfire. But how does that lock the engine up? Any and all help appreciated.
First off, 2010 Camaro SS, auto, 35,000 miles. Engine was running perfect, but I had a small gas leak from when I flipped the fuel rail ( I thought I'de be good not removing the bracket that was in the back and it bent the fuel rail). So I go and put on some JEGS fuel rails and converted to -6AN. Started it up and started spitting and clunking. Then just died. Now I can't even get the thing to turn over! Engine is locked up.
Can someone please offer some advice? Or maybe have this happen to them?
I pulled the code P0303, which I know that is an error code for a misfire. But how does that lock the engine up? Any and all help appreciated.
TECH Fanatic
Joined: Dec 2017
Posts: 1,467
Likes: 265
From: Bossier City, Louisiana
My suspicion would be that you have hydro locked a cylinder full of fuel. Do NOT attempt further engine starts until you remove the spark plugs to give any possible fuel in a hydro locked cylinder a place to escape. Only motor the engine with the spark plugs out to purge excess fuel.
Rick
Rick
Trending Topics
Teching In
Joined: Jul 2017
Posts: 22
Likes: 2
There are fuse diagrams on google. If you're trying to disable fuel, you can unplug your injectors or fuel supply line if you can't find the fuse. If you try to crank it (or key on) with fuel line off, stick the line in a bottle to catch the fuel from spilling. If you have an air compressor, shoot air in the cylinders and see if fuel comes out, watch your eyes though. I would try hand cranking the engine at crank pulley bolt with a wrench before taking the engine apart. If it rotates with a wrench, you aren't hydro locked. If it doesnt rotate, take off belt and try again. If still not rotating, you may have bent a rod assuming you did have fuel in the cylinder when cranking.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
Staging Lane
Joined: May 2018
Posts: 64
Likes: 0
I will try the hand method tomorrow. I found the fuse for the fuel pump is in the trunk on the passenger side. This is pretty scary since the only thing I did was switch fuel rails..... 
What's also weird, All but 2 plugs seemed drenched in fuel. I should have just bought an original fuel rail...…..
What's also weird, All but 2 plugs seemed drenched in fuel. I should have just bought an original fuel rail...…..