Weird problem NEED HELP!!!
Thread Starter
Teching In
Joined: Sep 2011
Posts: 6
Likes: 0
Weird problem NEED HELP!!! Hello, Ok here is what I got. I have a 5.3 with cnc 5.3 heads, cam (can get specs if needed) Carb intake, e85 carb and msd 6010. The problem im having is it appears to only be running on 4 cylinders. If I let car run cylinders 1,3,2,6 header tube is cold. Also car is very lazy and if you try to put on 2 step it will backfire out carb. Now things I have checked/replaced. I no it is not the carb as I have put on another car and also tried 2 different carbs on it. I have tried a new 6010, new coils, new crank sensor, new plugs,new wires. All clinders have 160 psi of compression. I have backed rocker arms off because I thought maybe pushrods were holding vlaves open and no change. Tried my own timing curve 32 deg straight across and msd pills. I really dont know what else to check. If you have any ideas it would be greatly appricated.
Thanks
Matt
Thanks
Matt
Thread Starter
Teching In
Joined: Sep 2011
Posts: 6
Likes: 0
I was told that the cam sensor was only used for startup? But I may be wrong
I have put to Brand new set of plugs in it.
Msd had 12 volts. I took ground and 12 volt wire and ran them straight to battery to bypass and switch 12 volt and bad ground.
I am now going to put motor at top dead center and marking balancer and making a pointer to verify timing in laptop is actual timing in engine.
Thanks for the responses any other information will be greatly appreciated
Thanks
Matt
I have put to Brand new set of plugs in it.
Msd had 12 volts. I took ground and 12 volt wire and ran them straight to battery to bypass and switch 12 volt and bad ground.
I am now going to put motor at top dead center and marking balancer and making a pointer to verify timing in laptop is actual timing in engine.
Thanks for the responses any other information will be greatly appreciated
Thanks
Matt
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On The Tree
Joined: Sep 2012
Posts: 109
Likes: 0
From: Montross VA
Another shot in the dark, I remember when I had the ls2in last year the cam sensor is in the front. I just picked up a newer 5.3 w sensor in front. Had to switch two wires going to cam sensor don't remember why or what colors. If sensor is in the back, no worries. May be worth checking.
