TwinTurbo.NET: Nissan 300ZX forum - 93 NA Stumbling
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Subject 93 NA Stumbling
     
Posted by sho1992 on April 11, 2024 at 1:01 PM
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Message Hi Everyone, I've been lurking here since the early 2000s when I was just daydreaming about these cars. In 2020, my father in law gave me his NA 93 that he bought new, which had been getting very little attention since 2005ish. Since then, I've been slowly doing a lot of the deferred maintenance.

Last spring, I started fighting a pretty severe stumble around 3k RPM. So far I've replaced the following (all OEM replacement parts), with no success:

Fuel Pump
Fuel Damper (on intake)
Injectors (from Bernie)
120k kit
MAF
Various vacuum lines
Coolant line delete

I got frustrated and kids activities got in the way so it's been sitting in the garage since then. I'm at a loss as to what else to try. The check engine light has never come on, so I've never tried looking for codes.

Could a misaligned CAS cause this problem? I haven't tried hooking up a timing light yet.

Any help would be greatly appreciated. I'd really like to be able to use the car this Spring/Summer!

Thanks
Bill in NJ

     
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