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Spark plug wire diagram

Tiny
JOE MYERS
  • MEMBER
  • 1993 CHEVROLET CAPRICE
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Need a diagram off plug wire placement on distributor cap. I have a 350 engine.
Saturday, October 8th, 2016 AT 7:32 PM

22 Replies

Tiny
JIS001
  • MECHANIC
  • 3,411 POSTS
There you go buddy. Solid dot is #1 on cap. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Saturday, October 8th, 2016 AT 8:20 PM
Tiny
BANKERMAN8
  • MEMBER
  • 1 POST
  • 1993 CHEVROLET CAPRICE
Engine Mechanical problem
1993 Chevy Caprice V8 Two Wheel Drive Automatic

i need to know the firing order for the 1993 chevrolet caprice
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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS


https://www.2carpros.com/forum/automotive_pictures/12900_fo_161.jpg

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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
VINCECAVITT
  • MEMBER
  • 4 POSTS
  • 1992 CHEVROLET CAPRICE
1992 Chevy Caprice V8

i'm having problems with my firing order. I would like for you to pls give me the firing order to my vehicle. When I got the vehicle the firing order was off. It just back fires when cranking over.
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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS


https://www.2carpros.com/forum/automotive_pictures/12900_92_fo_1.jpg

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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
VINCECAVITT
  • MEMBER
  • 4 POSTS
Thank you. I wont have to time the engine once im thru replacing the wires in their respective places, will i?
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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You don't have to time it, unless you dink around with the distributor
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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
STANLEY W. JACKSON SR
  • MEMBER
  • 1 POST
  • 1988 CHEVROLET CAPRICE
I need to know the firing sequence in the correct order from the distributor cap. Also need to see diagram to find the number one plug two plug all the way to the 8th plug and also need to see where the spark plug wire is connected to the distributor cap and need to know that order also.
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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Here is the firing order for the V8 engine with the #1 location in the distributor cap. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers
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Tuesday, February 19th, 2019 AT 8:26 PM (Merged)
Tiny
TFPARIS
  • MEMBER
  • 7 POSTS
  • 1988 CHEVROLET CAPRICE
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 52,000 MILES
Replaced all eight plugs but still have a miss. May have mismatched plug wires so need a good diagram of plug wires and correct firing order
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

I have included the information that you have requested in the diagrams down below. Please, if you should have any other vehicle related questions, feel free to ask. We are here 24/7 to answer them.

Thanks,
Alex
2CarPros
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
TFPARIS
  • MEMBER
  • 7 POSTS
Checked firing order and wiring still have a miss on load. Any suggestions?
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Did you double check the gap on the spark plugs? I have included the spark plugs specs in the diagrams down below. Also, I came across this Technical Service Bulletin*TSB) when I was getting the spark plug specs for your vehicle, and it, also, is included in the diagrams down below. Please look over these guides and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
TFPARIS
  • MEMBER
  • 7 POSTS
Thanks for the information. I should have pointed out also that the miss occurs under load. At idle it runs smoothly. I will check the gap, I set them at.35 and also the wires for tears. Suspect that may be hard to ID.
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

I'm pretty sure you just found the problem. According to the specs your plugs should be gaped at.060". Re gap and enjoy.

Thanks,
Alex
2CarPros
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
TFPARIS
  • MEMBER
  • 7 POSTS
My bad, my engine is a 5.0 liter which I think is 305 CI. The data plate on the front of the engine compartment says the plug gag is.35 I am running a check on the ignition wiring and so far all have checked out okay. Suggestions?
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
TFPARIS
  • MEMBER
  • 7 POSTS
Should I change the gag to.60 and disregard what the data plate says?
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Okay, sorry about that. Apon further review it depends on What VIN# you have. I have included a new updated Spark Plug Gap Guide for you in the diagrams down below. Please go through the guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
TFPARIS
  • MEMBER
  • 7 POSTS
Appreciate the guidance. Mine is a H so gap is.35. Check the conductivity of the wires this afternoon and they seem okay. Still have the miss. Not sure where to go next. Might replace the wires. Not sure how old they are.
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)
Tiny
STEVE W.
  • MECHANIC
  • 13,443 POSTS
Start the engine in a dark area and use a spray bottle with water in it to mist the wires. Any arcing and they need replacement.
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Tuesday, February 9th, 2021 AT 5:38 PM (Merged)

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