Spark plug wire placement on distributor and firing order needed?

Tiny
BIGBOB93NISSAN
  • MEMBER
  • 1993 NISSAN HARDBODY
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
Need firing order/wire placement for the truck listed above. Running rough/hard start.
Saturday, December 10th, 2022 AT 11:06 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,259 POSTS
Hi,

The firing order is 1, 3, 4, 2.

If you look below, I made a diagram for you showing how the plug wires should be positioned between the distributor cap and the spark plugs.

Please keep in mind, if the distributor has been changed, you really should check the timing to make sure it isn't too far advanced or retarded.

Take a look at the pic (sorry it looks like a child made it). I'm not good at making pics with a computer mouse. LOL Let me know if this helps or if you have other questions.

Take care,

Joe

See pic below.
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Saturday, December 10th, 2022 AT 1:53 PM
Tiny
BIGBOB93NISSAN
  • MEMBER
  • 4 POSTS
Thank you Joe, I appreciate I also had a question about another issue, I recently acquired the 93 Nissan pickup after it had been sitting 2 years, I got it running a drove it home (8-9 miles) and put some good new fuel in it and drove it around my place (approx 7-10 more miles) and it ran okay as I had to feather the pedal to stay running but upon changing the plugs and wires. It idles great and feels much better but when driving upon acceleration it begins to bog down spit, sputters and it's all I can do to get it home. I removed the seat and went through the process of retrieving codes, and I got three codes, ( idle control sensor, mass air flow sensor, and fuel pump) I removed the mass air flow sensor and did a resistance test with my multimeter and it read 4 ohms, and I'm get 12 volts to the mass air flow sensor plug. I read online that to be considered okay the mass air flow sensor must be within 1.5-3 ohms to be acceptable. Is that correct and what would be your plan of attack? Thanks in advance Joe. Any info is much appreciated.
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Tuesday, December 13th, 2022 AT 11:34 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,259 POSTS
Hi,

By chance, was there any of the 2-year-old fuel still in the tank after you added fresh fuel? That can cause this. Also, you may want to try a fuel injector cleaner.

Is there any smoke from the exhaust or odd smells from the exhaust that could indicate a fuel mixture issue?

Also, if you look below, it explains how to test a MAF for code 45. This is from a technical service bulletin.

Here is a link that explains how to clean one as well:

https://www.2carpros.com/articles/mass-air-flow-service

Let me know what you find.

Take care,

Joe.

See pics below.
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+1
Wednesday, December 14th, 2022 AT 8:57 PM
Tiny
BIGBOB93NISSAN
  • MEMBER
  • 4 POSTS
Thanks for your reply, I appreciate the help. And to answer your first question, yes there was about an 1/8 of a tank of gas that had been in the truck for the one and a half to two years. Also, I removed the MAF sensor and cleaned with MAF sensor cleaner carefully, not damaging it and I also test it with a multimeter and it read 4.0 ohms. I'm pretty sure if memory serves me, that if the MAF sensor is anywhere outside of 1.5-3 ohms, it is defective.
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Thursday, December 22nd, 2022 AT 5:15 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,259 POSTS
Hi,

Chances are the sensor is faulty. However, I did find a technical service bulletin related to it. Take a look at the attached pics below. They describe what to check when there is a code 45.

Let me know what you find.

Joe

See pic below.
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Thursday, December 22nd, 2022 AT 10:19 PM

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