Fuel delivery problem

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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FairladyFan
Posts: 35
Joined: Wed Apr 08, 2009 1:08 pm
Car: 1991 Fairlady Z
Location: Edmonton AB

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Hey guys.

So after 13 months I finally got my car all back together but it won't start. (It cranks over strong and nothing sparks or lights on fire so I must be on the right track. Haha)
First thing I tried was pulling the number 1 and 3 plugs. Both came out dry after lots of cranking and would spark when held against the plenum.
Next I pulled my return fuel line and made sure fuel was making it there. It was.
Next I pulled my CAS and listened for my injectors. All six are firing in as far as I can tell the right order.
So I cranked some more and pulled the plugs again. Still dry.
Next I tried some starting fluid into the intake and she fired for a sec and would die as soon as the starting fluid was burned up.

So I'm thinking the next step is to test the fuel pressure (perhaps my FPR crapped out from sitting dry for a year)
I was wondering where in the system I T in a gauge? I know it has to be before the FPR but does it also need to be after the dampener?

Any other suggestions on what to check?
Thanks in advance for the help.


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FairladyFan
Posts: 35
Joined: Wed Apr 08, 2009 1:08 pm
Car: 1991 Fairlady Z
Location: Edmonton AB

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Also one other quesion. If it turns out to be the FPR would you recommend changing the dampener at the same time?

Thanks again

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300ZXttZMAN
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Joined: Mon Nov 22, 2010 4:07 pm
Car: 1990 Nissan 300ZX TT 5spd pearl white

DD: 2008 Nissan Frontier NISMO pkg 4x4 Crew Cab
Location: Sulphur, LA 70665
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Sure it can't hurt.

Good luck!!

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FairladyFan
Posts: 35
Joined: Wed Apr 08, 2009 1:08 pm
Car: 1991 Fairlady Z
Location: Edmonton AB

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So the fuel pressure regulator holds the proper pressure.
anyone have any suggestions on where to look next?

I'm stumped on what to try.

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

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Have you tried an inline fuel pressure gauge just after the fuel filter? That is where you should tie-in.

Longshot but have you tried pulling codes from the ECU.

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FairladyFan
Posts: 35
Joined: Wed Apr 08, 2009 1:08 pm
Car: 1991 Fairlady Z
Location: Edmonton AB

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Yeah. That's where I tied it in.
It turned out to be a bad connection at each injector.
I unplugged each injector, cleaned the connector and plugged it back in.
Now all six injectors fire and the car runs great.

Thanks for the input though.


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