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Runs badly at 2,000 RPM's

Tiny
BJSM-2014
  • MEMBER
  • 1994 NISSAN TRUCK
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 97,566 MILES
Sometimes when start it, it is okay, but when I leave and start driving on the road it starts bugging out on me. Every time when it is about to hit 2,000 RPM's and even before 2,000 RPM's. Do not know the problem.
Friday, November 2nd, 2018 AT 5:08 AM

62 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
Hi and thanks for using 2CarPros.com.

What you described can be the result of many things. Things such as low fuel pressure, need of tune up, engine vacuum leaks, partially plugged catalytic converter, can all cause issues.

What I suggest is to check for diagnostic trouble codes. Here is a link that shows hot to check on an OBD1 system as your vehicle has:

https://www.2carpros.com/articles/nissan-obd1-diagnostic-trouble-codes-and-retrieval-procedure-1984-to-1994

Do this first and let me know what you find. If I try to just give you all the things it could be, it will become confusing.

Let me know if you have trouble or have other questions.

Joe
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Saturday, November 3rd, 2018 AT 6:41 PM
Tiny
BJSM-2014
  • MEMBER
  • 37 POSTS
Thank you but still acting up. Now my number five spark plug wire is not giving any spark. I check distributor cap, and rotor still good unless its the whole distributor? I also rotate it little bit but still no spark on number five wire. I bought spark plugs and wires just three months ago and it was running fine. I have my old ones try to replace it to spark plug wire number five still the same problem no spark. Any advise?
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Thursday, November 8th, 2018 AT 3:09 AM
Tiny
BJSM-2014
  • MEMBER
  • 37 POSTS
When I start my truck it will idle up and down and shuts off after a few seconds.
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Thursday, November 8th, 2018 AT 3:10 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Welcome back.

The idle issue sounds like it could be related to the idle air control valve (IAC) or an engine vacuum leak. However, that is not related to the no spark to only one plug.

Have you checked for trouble codes?
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Thursday, November 8th, 2018 AT 7:13 PM
Tiny
BJSM-2014
  • MEMBER
  • 37 POSTS
Do you know what is a good scanner for this? Not to expensive though. Truck is 1994 Nissan hard-body v6 3.0 automatic. I searched online there is different plug in and I am not sure.
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Sunday, November 11th, 2018 AT 9:52 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
Welcome back.

Honestly, OBD1 scanners are getting more difficult to find. If you follow the link I sent, you should not need a scanner. The computer will communicate via the engine light.

Let me know if I can help.

Joe
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Monday, November 12th, 2018 AT 4:54 PM
Tiny
BJSM-2014
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  • 37 POSTS
I checked trouble codes giving me 55 ( No malfunction recorded ). I have no clue.
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Monday, November 12th, 2018 AT 7:44 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
Welcome back.

That does not help. Lol Since there is no spark on the one cylinder, we need to check the ignition control module/power transistor. It it near the coil. Remove it and follow these test directions.

1. Disconnect power transistor harness connector.

Picture 1 shows the connector on the component as well as what leads to test.

2. Check continuity between power transistor terminals with a digital meter.

Picture 2

Note: Set tester in lower range.

Confirm the readings correlate with the specs in pic 2.

Picture 3 shows component location.

The only other things I question are the distributor itself or the cam sensor, which is responsible for ignition timing and injection timing. However, I feel it should have set a code.

Let me know if you have questions or need help.

Joe
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Monday, November 12th, 2018 AT 8:06 PM
Tiny
BJSM-2014
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  • 37 POSTS
Where is my crank position sensor?
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Monday, November 12th, 2018 AT 8:22 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny

Just to help. It is located inside the distributor in your engine. I have attached a picture. Hope this helps and thanks for using 2CarPros.
Danny
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Tuesday, November 13th, 2018 AT 5:18 AM
Tiny
BJSM-2014
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Thank you and also do you know any scanner for 1994 Nissan Hard body v6?
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Wednesday, November 14th, 2018 AT 4:11 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

That will be hard to find, however Snap-On brand has the MT26000 for your vehicle but has to have the Import Cartridge for your vehicle as it is OBD1. I am attaching a tutorial for you. Scroll to see Nissan. Hope this helps.
Danny-

https://www.2carpros.com/articles/nissan-obd1-diagnostic-trouble-codes-and-retrieval-procedure-1984-to-1994
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Thursday, November 15th, 2018 AT 1:52 AM
Tiny
BJSM-2014
  • MEMBER
  • 37 POSTS
I have a question. Do you know the order of the spark plugs wires. On the left side passenger it goes 135 and right side is 264. Is that the correct?
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Saturday, November 24th, 2018 AT 5:46 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Welcome back

I attached a picture of the firing order. Let me know if it helps.

Joe
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Saturday, November 24th, 2018 AT 7:47 PM
Tiny
BJSM-2014
  • MEMBER
  • 37 POSTS
My truck is 1994 v6 3.0l the way I was looking at it right now the wires is going 264 not 246.
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Saturday, November 24th, 2018 AT 8:07 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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The firing order is 1 2 3 4 5 6. So, starting with the number 1 which is in white, and the distributor turning counter clockwise, that is the order the plug wires need installed. Basically, at 10 oclock on the distributor is cyl 1, at 8 oclock would be the wire going to cylinder 2, at 6 oclock that is where the wire to cylinder 3 would go and so on.

I apologize, but I'm not sure what you mean with going 264 and not 246. Can you explain?
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Saturday, November 24th, 2018 AT 10:00 PM
Tiny
BJSM-2014
  • MEMBER
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Okay, on the left side passenger of the engine its goes 1, 3, 5 in order odd number and right side of driver of the engine it goes 2, 6, 4 in order even number.
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Sunday, November 25th, 2018 AT 4:02 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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That sounds correct. Did it make any difference?
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Sunday, November 25th, 2018 AT 3:58 PM
Tiny
BJSM-2014
  • MEMBER
  • 37 POSTS
Okay, just checking. Okay, now my truck starts when I adjust the distributor but its still idling and it will shut off. There is spark and fuel and compression is good starter is good battery is good. Could it be my ignition lock cylinder? Because when I start it it is hard for me to turn it on like I have to force it. So I took out the panel to take a look and found out harness was loose or it is not connecting or whatever. Could that be it too?
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Monday, November 26th, 2018 AT 2:37 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,772 POSTS
If it shuts itself off after starting, the switch could be bad. Do a spark test and see if spark stops when the engine shuts off. If it does, then you may have a switch problem. It could also be the ignition control power transistor. The ignition signal from the ECM is amplified by the power transistor, which turns the ignition coil primary circuit on and off, inducing the proper high voltage in the secondary circuit. Test that next. Follow the following directions and the two attached pictures.

1. Disconnect power transistor harness connector.

2. Check continuity between power transistor terminals with a digital meter.

Note: Set tester in lower range.
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Monday, November 26th, 2018 AT 12:10 PM

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