300ZX (Z31) Performance / Technical Discussions related to Turbo charging, Supercharging, Engine, ECU, exhaust, and etc. performance enhancements and Techical related.

Engine Trouble

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Old Nov 9, 2007 | 09:18 AM
  #1  
hobo105's Avatar
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Engine Trouble

I have a question.

My '87 300 NA has a bad habit that it seems to have picked up in the last few months and I CANNOT for the life of me find what's wrong.

Under heavy load (eg, takeing off from a light with a touch of "gusto") the engine fails to deliver steady power (Jump, lag, jump, lag, jump, lag etc). I've checked compression, it's perfect, plugs wires and rotor are all brand new and working perfectly.

The thing is .. it only happens periodically and it is IMPOSSIBLE to make it do it on command. Any ideas?
Old Nov 9, 2007 | 02:57 PM
  #2  
AZ-ZBum's Avatar
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Joined: Jan 2005
Posts: 1,396
From: Phoenix, Arizona
timing or bad gas. could also be a vacuum leak.
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