Dead Cylinder in my J30

Discuss topics related to the VG and VE series engines.
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freakonaleash1187
Posts: 1460
Joined: Tue Jan 27, 2004 5:09 pm
Car: '93 300ZX N/A, '97 200SX SE

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My 1993 Infiniti J30 started running like crap two days after I put it up for sale. It felt like it was missing a cylinder, so I started unplugging each coil pack and found out which cylinder is not firing. So I first changed the spark plugs, and that cylinder is still not firing. So I then switched around coil packs and the same cylinder is not firing. Then I OHM-tested the injectors, and they are all in spec. So now I am lost. Its not the spark plug, its not the coil pack, and the injector tested good, what else could make a cylinder not fire? Please don't tell me it is something internal, lol.


Q45tech
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Posts: 14296
Joined: Tue Apr 30, 2002 3:19 am
Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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Are you saying the coil is not getting the pulse from ecu or have you not actually checked for a spark extending coil out and a plug externally.

Each coil and injector has a separate driver transistor in ecu that switches ground on and off.

jwilliams050
Posts: 6
Joined: Wed Aug 22, 2007 4:39 am
Car: 1993 infinite j30t

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did you ever figure out your problem? I AM HAVING THE EXACT SAME PROBLEM! I ended up buying an ignition module off ebay. And still no fix. HELP!!


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