LT-1 mis-firing
Thread Starter
Intermediate
Joined: Nov 2016
Posts: 27
Likes: 9
From: Vacaville, CA
LT-1 mis-firing
My 1970 LT-1 is running rough, seems to be mis-firing when power is applied and it bogs
down. Has been in long term storage but gas was always treated. Holly carb was sent out and reconditioned- appeared clean. New plugs, old ones dry when they came out. Any LT-1 motor heads ot there with ideas? Previous owner(s) have documented a lot of ignition issues in the past, I've only had the car 2 years so not real experienced.
down. Has been in long term storage but gas was always treated. Holly carb was sent out and reconditioned- appeared clean. New plugs, old ones dry when they came out. Any LT-1 motor heads ot there with ideas? Previous owner(s) have documented a lot of ignition issues in the past, I've only had the car 2 years so not real experienced.
Race Director
Joined: May 2006
Posts: 18,729
Likes: 2,579
I assume you have the original TI style of ignition system, read the link below for some failure points and tests.
Did you check the condition of the cap and rotor?
Did you do a resistance test on the plug wires, 1k/ft.
What make and number spark plug did you install?
Did you gap the plugs to .035?
Did you adjust the idle mixture screws when you installed the carburetor?
http://www.tispecialty.com/articles/article1.htm
Did you check the condition of the cap and rotor?
Did you do a resistance test on the plug wires, 1k/ft.
What make and number spark plug did you install?
Did you gap the plugs to .035?
Did you adjust the idle mixture screws when you installed the carburetor?
http://www.tispecialty.com/articles/article1.htm
Last edited by MelWff; Nov 22, 2016 at 02:52 PM.
Thread Starter
Intermediate
Joined: Nov 2016
Posts: 27
Likes: 9
From: Vacaville, CA
I assume you have the original TI style of ignition system, read the link below for some failure points and tests.
Did you check the condition of the cap and rotor?
Did you do a resistance test on the plug wires, 1k/ft.
What make and number spark plug did you install?
Did you gap the plugs to .035?
Did you adjust the idle mixture screws when you installed the carburetor?
http://www.tispecialty.com/articles/article1.htm
Did you check the condition of the cap and rotor?
Did you do a resistance test on the plug wires, 1k/ft.
What make and number spark plug did you install?
Did you gap the plugs to .035?
Did you adjust the idle mixture screws when you installed the carburetor?
http://www.tispecialty.com/articles/article1.htm
Great stuff - thanks! I'll go through the checks and let you know.
