car runs well but sometimes very rough

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
boostedmatt
Posts: 6
Joined: Wed Sep 12, 2012 7:28 pm
Car: 1990 nissan 300zx twin turbo

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i think my problem is electrical but i want to know where i should start...car will start fine but sometimes if i either rev it high it will start cutting out then back on over and over again and it will also happen randomly while driving. is it something related with fuel or fuel pump? bad connection somewhere? i have a rough idea what the problem could but but i want to know which wires would cause this behavior? problem is intermitten!!!


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t.mcginley.jr
Posts: 1547
Joined: Fri Jun 01, 2012 5:50 am
Car: 2002 Nissan Altima SE 3.5
1990 Nissan 300ZX NA 2+0
1966 Ford Mustang
Location: New Jersey, USA

Post

A little more detail might help diagnose this...

Since it's intermittent, whatever is causing it is likely on its way out. It could be the fuel pump, PTU, CAS, an injector, or ANY of the electrical connections in the engine bay. They are all prone to corrosion. Since it happens at high RPMs, try doing a compression test.


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