Firing Order Help

Chris Lennon

Member

Jan 8, 2017

25

2

13

Jan 10, 2017

#1

• Jan 10, 2017

• #1

If anyone remembers I posted about gt-40 manifold problems I think I've found the problem my firing order is wayyyy off but the thing is the online diagram I don't believe are right I will post a picture of how my wiring were before the swap can anyone tell my looking at my distributor cap what my firing order was??

 

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Chris Lennon

Member

Jan 8, 2017

25

2

13

Jan 10, 2017

#2

• Jan 10, 2017

• #2

AFTER SWAP....

 

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jozsefsz

15 Year Member

Aug 11, 2013

1,243

332

124

Cleveland OH Area

Jan 12, 2017

#3

• Jan 12, 2017

• #3

The firing order is driven by the cam. If you happen to have an old, pre-H.O. 302 it's going to have a different order than the H.O. 351W is also different. If you find the right diagram matching your cam, it'll be fine. The manifold would not change your firing order. As it's hard to tell from the pictures where the wires are running, so it's going to be one of two options (302 firing order or 351W firing order). Try 'em both.

Edit: I see from your other post you figured it out.

 

Dan_Soprano

15 Year Member

May 7, 2003

7,410

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129

Jacksonville, FL

Jan 18, 2017

#4

• Jan 18, 2017

• #4

351W and H.O. 5.0 firing order is the same.

 

H

Hypnotic818

Member

Jul 1, 2016

79

2

8

Lancaster, Ca

Jan 20, 2017

#5

• Jan 20, 2017

• #5

• 5.0 HO Firing Order: 1-3-7-2-6-5-4-8
• 5.0 (Older, non-roller) Firing Order: 1-5-4-3-6-2-7-8

HO is what I use for my 94 GT. Non-roller made my car misfire and hard start and stuff. I have GT-40 lower and upper intake also

EDIT: Wasn't sure if he figured it out or not

 

Reactions: Chris Lennon

Chris Lennon

Member

Jan 8, 2017

25

2

13

Jan 30, 2017

#6

• Jan 30, 2017

• #6

Thanks for the help anyway dude but yes I did figure it out

Hypnotic818 said:

• 5.0 HO Firing Order: 1-3-7-2-6-5-4-8
• 5.0 (Older, non-roller) Firing Order: 1-5-4-3-6-2-7-8

HO is what I use for my 94 GT. Non-roller made my car misfire and hard start and stuff. I have GT-40 lower and upper intake also

EDIT: Wasn't sure if he figured it out or not

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