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

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Old 07-04-2018, 09:28 AM   #1  
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Z31 86

Z31 wonít start
Has spark and fuel
Starts with starting fluid
Ecu says 31
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Old 07-05-2018, 07:03 AM   #2  
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If it starts with starting fluid, you DON'T have fuel... The injectors aren't spraying either because they aren't getting power or there's no fuel pressure.
So... what have you checked? How do you know you "have fuel" ?
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Old 07-05-2018, 08:28 AM   #3  
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Z31 86

Well I went and bought a new fuel pump and filter because at first I couldnít hear that but now I do and I took out the tank to clean it out put it back in and I took off the tubes connected to the fuel filter and fuel was coming out but the car still doesnít start...

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Old 07-05-2018, 10:43 AM   #4  
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So have you checked the fuel pressure? Checked for power at the injectors?
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Old 07-09-2018, 09:23 PM   #5  
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Yes fuel pressure is fine and no I havenít checked the injectors my friend is telling me I need a new throttle positioning sensor
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Old 07-14-2018, 08:14 PM   #6  
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More history needed. If the car has sat for more than 2 years the injectors are lickly frozen. Take a 9v battery and hook up a small lead to each injector and make sure you hear it clicking ( your checking to see if the coils are stuck).
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