Starting Help (please)

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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fyneyoungstunna
Posts: 184
Joined: Sun Jul 18, 2004 4:09 pm
Car: nissan s12...more to come

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Well im just comming from doing the water pump stuff, and the injector replacement after that.

On the first crank from hooking everything back up it wanted to start but would not turn over. Tried again an it turned over for a second and then died.
Its acting like its not getting fuel, but i can hear the fuel pump prime when i turn the key.

I can think of two vacuum leaks right off the back of my head. BUT, i did the delete of the stuff under the plenum, the two lines are under the throttle-body and they face inwards. My ptu is fine, as i cleaned and checked it first thing.

only other think i can think of is I might have pinched an o-ring, but there is no fuel smell from under the hood. That and the actual connectors going to injectors and coils. I tried wiggling those while it was being cranked over but it didnt change anything.

Also, could it be out of time since I took the crank off for the water pump stuff?

ok gotta update a little bit.
she starts and will stay if i hold the gas down so i'm thinking i just gotta redo the injectors.
I have a brand new plenum gasket on there, if I take off the plenum will it be ok?


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Infinitiguy19
Posts: 7787
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

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Just for fun make sure the fuel system holds pressure for more than 10 minutes. And if it does look at the Idle Air Control valve (IACV)/Auxillary Air Control valve (AAC).

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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Sounds like it may be a TPS or MAF issue to me. My TT does this like once every 50 or so starts (if even that often,) and it scares the s*** out of me every time. All my injectors ohm perfectly in spec. I was thinking about taking the MAF off and cleaning it, but I've also heard horror stories about cleaning MAFs and them not working afterwards.


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