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1993 300ZX problems

Tiny
TURNER242
  • MEMBER
  • 1993 NISSAN 300ZX
  • 6 CYL
  • 2WD
  • MANUAL
  • 93,500 MILES
I have a 1993 300zx n/a 5 speed. When I crank it the rpms fluctuate, then while driving down the road it jumps and******. You can feel it in the rear of the car, but when you punch it & to through the gears it reacts fine. I'm clueless about this car so I'm looking for some help thanks!
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Tuesday, April 19th, 2011 AT 4:33 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Symptoms indicates a likely fault with the distributor, ignition coil, igniter control module or poor ground circuit connections of the distributor or engine control unit.
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Tuesday, April 19th, 2011 AT 8:40 PM
Tiny
TURNER242
  • MEMBER
  • 2 POSTS
So what would be the best way to check for the problem?
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Wednesday, April 20th, 2011 AT 3:52 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Your vehicle should be Distributorless Ignition (EI) and the I would suggest testing the ignition coil and power transistor.

Ignition Coil Resistance

Disconnect ignition coil connector. Check primary resistance between terminals "B" and "C" of ignition coil connector. See Fig. 6. Resistance should be about 0.75 ohm. If resistance is not as specified, replace ignition coil.

Power Transistor Circuits
Disconnect power transistor unit connector. Check continuity at each power transistor unit terminal. See Fig. 9. If continuity is not as specified, replace power transistor.
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Wednesday, April 20th, 2011 AT 1:20 PM

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