Wiring diagram for firing order

Tiny
BOB IZUMI
  • MEMBER
  • 1998 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 218,000 MILES
I just changed the cap, rotor, plugs and wires and can't get it to fire, i'm looking for the diagram for the firing order?
Thursday, February 26th, 2009 AT 9:12 PM

7 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.


https://www.2carpros.com/forum/automotive_pictures/12900_fo_39.jpg

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Thursday, February 26th, 2009 AT 9:23 PM
Tiny
KORTEGA
  • MEMBER
  • 1 POST
  • 1998 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 10,000 MILES
I need the firing order for my truck it has a 5.0 vortec engine
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Thursday, May 23rd, 2019 AT 2:52 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Firing order 1-8-4-3-6-5-7-2

| 2 4 6 8 1 3 5 7 | Distributor rotates clockwise.
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Thursday, May 23rd, 2019 AT 2:52 PM (Merged)
Tiny
NEWAVDAVE1
  • MEMBER
  • 1 POST
  • 1989 GMC SIERRA
Electrical problem V8 Four Wheel Drive Automatic 100000 miles

need firing order & diagram please I love this site.
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Thursday, January 21st, 2021 AT 9:04 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,602 POSTS
The firing order is V8 18436572 here is both the v6 and v8 engine (below).

v6 - Firing Order1-6-5-4-3-2

Here is a guide to show you how to tune up your car

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Spark plug wire stats.

0-15 inch cable 3,000 - 10,000 ohms.
15-25 inch cable 4,000 - 15,000 ohms.
25-35 inch cable 6,000 - 20,000 ohms.
NOTE: Longer wires should measure about 5,000 to 10,000 ohms per foot.

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Thursday, January 21st, 2021 AT 9:04 AM (Merged)
Tiny
32RENZ
  • MEMBER
  • 1 POST
  • 1986 GMC SIERRA
Engine Performance problem
1986 GMC Sierra V8 Two Wheel Drive Automatic

I need the firing order on gmc suburban
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Thursday, January 21st, 2021 AT 9:04 AM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
The firing order is 1 8 4 3 6 5 7 2 driverside head 1357 passenger 2468
get #1 cylinder up on compression stroke and see where the rotor is pointing this will be the start of your firing order goes clockwise

Mark (mhpautos)
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Thursday, January 21st, 2021 AT 9:04 AM (Merged)

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