Question about 1985 Nissan 300ZX

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1985 nissan 300zx---not starting

You made a lot of sense and I thankyou. I took a spark plug wire off and held it close to metal to check for spark---did not see any. what do I use to check fuel PSI?

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To check fuel pressure psi you use a "Fuel Pressure Tester". Auto Zone and Advance Auto Parts offer a "Free Tool" loaner service. A few other chain type stores offer the same service. They allow to use their tools for free. The way it works, is that you go into the store, buy whatever tool you need to do the job, use the tool, then bring it back for a refund. In the end use of the tool ends up costing you nothing.

Posted on Dec 28, 2008

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1 Answer

Where are the points located in distributor cap of 1985 300zx-will this keep car from starting?


Remove rotor button and points are underneath. Usually capacitor is what fails and prevents starting. It is also located with the points. Replace both (cheap!) and adjust points and you may have a fix. If not, check are you getting fuel delivery? Do you have spark at the plugs?

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1985 Nissan 300zx seems to be "missing".


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distributor component(s), or (4) worn out distributor cap and/or rotor - if these need to be changed,
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Car wont start


Fuel delivery must be confirmed with a fuel pressure gauge on this vehicle. Disconnecting the fuel line and cranking the engine to see fuel shooting out does not confirm pressure, it only confirms fuel delivery. Remember you need both fuel delivery and pressure. On this vehicle if the psi is off by just one number that's enough to keep it from starting. Also replacing the coil and rotor (as you stated) does not confirm that spark is reaching the plugs. Confirm that both spark and adequate fuel pressure are reaching ALL the spark plugs.

Dec 28, 2008 | 1985 Nissan 300ZX

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