Firing order diagram

Tiny
LAVAFLOZ
  • 1998 CHEVROLET SILVERADO

V8 four wheel drive automatic 100,000 miles

I am looking for a diagram for the plug wires to the distributor cap connections. I know the firing order is 1-8-4-3-6-5-7-2. While replacing the (crab type) cap, rotor, plugs and wires, I messed up bad by not labeling the wires on the cap. The engine is a Vortek 5.7L 350. It is a K1500 4X4 automatic. Any help you can provide would be greatly appreciated. Thank you

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Sunday, November 2nd, 2008 AT 7:09 PM

12 Replies

Tiny
OBXAUTOMEDIC
  • EXPERT
  • 3,785 POSTS

Hello,

Here is the spark plug to distributor wiring diagram.


http://www.2carpros.com/forum/automotive_pictures/188069_98k1500fireorder_1.jpg



Larger version below

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

Cheers

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Sunday, November 2nd, 2008 AT 7:16 PM
Tiny
LAVAFLOZ
  • MEMBER

Thank You. Just to be sure, I connected wire one to cap position one, and so on. Is this correct? The service engine light was illuminated prior to this. I hooked up my Digital OrbitII Code Reader, and it displayed P0300 - Random/Multiple Cylinder Misfire Detected. This was before I changed the wires per your diagram. I believe I need to figure out how to clear the code, and scan it again. Lastly, I noticed a strong gas smell when I fired it up, and a grayish/black smoke came out of the tailpipe. If you think I should do something else, please let me know, otherwise, I appreciate your response and help. Aloha from Hawaii!

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Sunday, November 2nd, 2008 AT 8:55 PM
Tiny
OBXAUTOMEDIC
  • EXPERT
  • 3,785 POSTS

Yes, just match up the number 2 to 2 3 to 3 etc. The smell of gas may just be do to the misfire, so complete the plug wire and see what happens. Your scanner may have a way to clear the codes check the manual for it. Post finding here.

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Monday, November 3rd, 2008 AT 12:23 PM
Tiny
LAVAFLOZ
  • MEMBER

Code cleared, no new codes. Gas smell gone, and no smole from tailpipe. All in all, everything works great! Thanks for the help! :)

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Tuesday, November 4th, 2008 AT 1:24 PM
Tiny
WATERLOVER
  • MEMBER

Why does the number pattern on the cap not match the firing order?

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Saturday, June 23rd, 2012 AT 11:31 PM
Tiny
BOYKO68
  • MEMBER

Does the diagram also apply to the 5.0l Vortec? I have a 1999 k1500 with the 305 that is putting out the same code, so if the diagram is also for the 5.0 Vortec I will check my plug wires. Thanks in advance.

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Monday, October 15th, 2012 AT 2:19 PM
Tiny
BLUEROSEZ
  • 1998 CHEVROLET SILVERADO

Engine Mechanical problem
1998 Chevy Silverado V8 Two Wheel Drive Automatic

Could you give me the firing order for this truck? Because I put spark plug wires on wrong.

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Tuesday, July 25th, 2017 AT 8:02 PM (Merged)
Tiny
TEDSKI
  • MEMBER

Here is the firing order for your truck

2, 4, 6, 8, Right Bank on the top

1, 3 5, 7, Left Bank on the bottom

The Distributor rotation on the right is 8 2 4 6 on on the left is 1 7 3 5

Hope this help you
tedski new person to this site.

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Tuesday, July 25th, 2017 AT 8:02 PM (Merged)
Tiny
JONLEE17
  • 1998 CHEVROLET SILVERADO

Engine Mechanical problem
1998 Chevy Silverado V8 Four Wheel Drive Automatic 173000 miles

i just changed the spark plugs, wires and battery in my pickup, now it won't start. I think I got the firing order wrong can you help?

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Tuesday, July 25th, 2017 AT 8:02 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
  • 16,970 POSTS

Sure.

For the 4.3L Engines:
1-6-5-4-3-2 Distributor Rotation: Clockwise


http://www.2carpros.com/forum/automotive_pictures/261618_0900c1528008ee21_1.jpg



For the 5.0L, 5.7L and 7.4L Engines:
1-8-4-3-6-5-7-2 Distributor Rotation: Clockwise


http://www.2carpros.com/forum/automotive_pictures/261618_2_4.jpg



Hope this helps..
Thanks for using 2carpros.com!

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Tuesday, July 25th, 2017 AT 8:02 PM (Merged)
Tiny
ANFK
  • 1998 CHEVROLET SILVERADO

Other Category problem
1998 Chevy Silverado V8 Four Wheel Drive Automatic 210000 miles

what is the firing order for this truck? Thanks!

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Tuesday, July 25th, 2017 AT 8:02 PM (Merged)
Tiny
MASTERTECHTIM
  • MEMBER

I dont know off the top of my head but look real close to the dist cap its marked right on it. The drivers side front cylinder is #1 and pass front cyl is #2 so drivers side is 1-3-5-7- pass side 2-4-6-8. Ok

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Tuesday, July 25th, 2017 AT 8:02 PM (Merged)

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