90 NA wont sart after plenum pull & injector swap

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
datdude407
Posts: 49
Joined: Fri Jul 30, 2010 10:11 am
Car: 1990 300ZX NA
Location: orlando FL /atlanta ga

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Six weeks ago I started the plenum pull to change the injectors.I put a new fuel rail in with 6 new injectors. I have everything back together and the car wont sart. Everything is hooked up. Im getting fuel, idk if im getting spark. I ran ECU test & got 34 & 42. Now I changed the the fuel temp sensor from old fuel rail & i did a knock sensor bypass and i am still getting the same codes and is still not cranking up. Please help. I havent even had a chance to drive the car yet, brought it in may with 2 bad injectors and had it parked the rest of the time


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es.biggs
Posts: 2120
Joined: Sat Feb 20, 2010 10:32 am
Car: 1990 300ZX 5sp NA
Location: Charlotte, NC

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Double check the hoses for vacuum leaks, make sure your coolant temp sensor is getting a good connection (CAS and PTU as well) actually go ahead and check all your connections.

That'd be my angle of attack!

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evildky
Posts: 14225
Joined: Sat Jan 31, 2004 9:23 pm
Car: 71 Datsun 240ZT
87 Nissan 300ZX N/A-T
06 Nissan 350Z GT
Toyota Tundra TRD RW
Location: Louisville, KY
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the fuel sensor code is likely just a corroded connector, clean up the connector and retry, the knock code however, did you disconnect the knock when you added the resistor? you sure you got the resistor connected securely?

300zxnismo
Posts: 8
Joined: Tue Aug 24, 2010 7:34 pm

Post

Check our injectors, it might be hydro locked. What's it do when you try to start it?

datdude407
Posts: 49
Joined: Fri Jul 30, 2010 10:11 am
Car: 1990 300ZX NA
Location: orlando FL /atlanta ga

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the car just turns over. I drove the car with the 2 bad injectors for 2 weeks. drove the car 15 miles to the garage i am working on it at. I followed the tt.net write up, and I even had an experinced Z guy come over and lookover the engine and assist with the plenum pull. i am stuck...I am very frustarted with it. I attemted the pull to save $500 and I didnt want to dremel my manifold. I am 2 seconds away from just getting the car towed to the shop and have them sort it out.

300zxnismo
Posts: 8
Joined: Tue Aug 24, 2010 7:34 pm

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You should check you cas and ptu.

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The Silent Genius
Posts: 22
Joined: Sat May 16, 2009 5:49 pm
Car: 1990 Nissan 300ZX Twin Turbo
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300zxnismo wrote:You should check you cas and ptu.
when my cas failed it threw a code. could be the ptu though. have you tried firing some ether into the TB?

datdude407
Posts: 49
Joined: Fri Jul 30, 2010 10:11 am
Car: 1990 300ZX NA
Location: orlando FL /atlanta ga

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The problem ended up being the fuel rail had a clog in it. I didn't think to blow compressed air in it when it was apart. The objectors were purchased from a buddy of mine who did a TT swap a couple years prior, and had them sitting around


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