Fox Misfires Under Hard Acceleration - Carburetor Experts Needed

[Demustangs]

You probably have 2 plugs that are not firing.

You were right it was bad plugs she runs really good now with .054 gap ngk plugs

 

[Demustangs]

UPDATE: BAD SPARK PLUGS . I USED NGK PLUGS .054 GAP

 

[Demustangs]

Thanks everybody for the help along the way I apprciate it!

 

[Jack peaker]

89 fox body randomly started backfiring and misfiring on hard acceleration timing set at 14 degrees gt40 heads and 650 double pumper on it plugs and everything less than 6 months old only backfires under hard acceleration

 

[Demustangs]

Bad plugs. Bought ngk .054 gap fixed it

 

[Jack peaker]

I see you have it fixed but I was going to say it is a plug or a wire had same trouble before on my 64 1/2 mustang with 302.......

 

[Demustangs]

Bad plugs. Bought ngk .054 gap fixed it

 

[Demustangs]

I see you have it fixed but I was going to say it is a plug or a wire had same trouble before on my 64 1/2 mustang with 302.......

Both actually i flipped the wires over and they had a deteriated crack very small but was still there so definitely had to replace wires and plugs it made the fox very simple and affordable

 

[Jack peaker]

I see you have it fixed but I was going to say it is a plug or a wire had same trouble before on my 64 1/2 mustang with 302.......

Both actually i flipped the wires over and they had a deteriated crack very small but was still there so definitely had to replace wires and plugs it made the fox very simple and affordable

Very good have a great day...