Cranks but won’t start 350z
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From: Texas
Cranks but won’t start 350z
I have a 06 350z and it cranks but won’t start before this happened when I would get on the gas it would lag or big and I wouldn’t have any power to the wheels and the exhaust with sputter, and it stalled out on me a a light and since then it won’t start, I have an upgraded fuel pump that was just replaced also the crank and camshaft sensors have been replaced. It’s not throwing any codes aswell, please help
I did a full top end rebuild and it started right up on first start up and was running good for about 2-3 weeks then this.
I did a full top end rebuild and it started right up on first start up and was running good for about 2-3 weeks then this.
Without any codes being thrown it will be difficult to narrow down. Since you upgraded the fuel pump, did you also get the engine tuned? If it were me, I would verify/check fuel line pressure and look for any air leaks around your intake manifold, downstream of the MAF sensor. Normally rogue air causes rough idle, it shouldn't prevent the engine from starting.
Since top end engine work was done, you could also have a valve or timing issue present. Normally this would reveal itself upon first startup, which makes me lean towards the new fuel pump being the issue. You could have a defective or burned out unit. When the heads were re-worked, did you do any other upgrades such as cams or valve springs? Also have you run the Z recently with the fuel tank extremely low on gas?
Luckily the fuel pumps on these cars are easy to source and replace. I hope that's what your issue is.
Good Luck!
-Icer
Since top end engine work was done, you could also have a valve or timing issue present. Normally this would reveal itself upon first startup, which makes me lean towards the new fuel pump being the issue. You could have a defective or burned out unit. When the heads were re-worked, did you do any other upgrades such as cams or valve springs? Also have you run the Z recently with the fuel tank extremely low on gas?
Luckily the fuel pumps on these cars are easy to source and replace. I hope that's what your issue is.
Good Luck!
-Icer
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From: Texas
I didn’t replace cams or valve springs, on start up I am hearing the fuel pump and it is pushing fuel through the top on the housing, it’s never run low on gas and died at about half a tank.
Would I be getting a code if I’m not get spark likes misfire or anything?
I’m leaning towards a fuel related issue but I’m still baffled on my next step.
Would I be getting a code if I’m not get spark likes misfire or anything?
I’m leaning towards a fuel related issue but I’m still baffled on my next step.
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Joined: Dec 2006
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From: Edina, Minnesota
I am certain this one is frustrating for you. I had a nearly identical experience with my 2003, and fixed the problem by replacing the camshaft and crankshaft sensors. But then I had an identical failure. I took the car to the dealer, and they diagnosed the problem (reading a code) as a faulty sensor (I do not remember which one). Replacing the sensor fixed the problem. I don’t know if I had installed a faulty sensor or had simply installed it incorrectly.You should be getting a code.
Did you have a Nissan dealership read the codes?
Did you have a Nissan dealership read the codes?
With the crank and cam sensors already replaced and no codes posted, this is indeed frustrating. The only other items I can think of to check are "Spark" and "Timing". An engine needs 5 basic things to run. (1) Fuel, (2) Air, (3) Spark, (4) Compression, (5) Timing.
-Icer
-Icer
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From: Edina, Minnesota
I am thinking he is not getting fuel-delivery. I say this because he is not getting a code, and a bad sensor would deliver a code (even an inaccurate one). A failure of fuel-delivery might not result in a code. But… I am guessing. 
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From: Texas
Update: loose power with hard acceleration
update: so leading of of my other post I since changed the spark plugs and was able to start the car I’ve been driving for 2 days now and going back to the original problem I had with harder than normal acceleration the car with seemingly loose power and I’ll have no power to the wheels still not sure what this could be
new spark plugs
new camshaft sensors
new crankshaft sensor
new fuel pump with bored resonator
i have fuel pressure and everything I drive it fine for a day hesatint to do any pulls and today when I attempt at something small it does this could this be because I need a tune? I doubt there is anything wrong with the timing because the car has been running for a month now since rebuild
new spark plugs
new camshaft sensors
new crankshaft sensor
new fuel pump with bored resonator
i have fuel pressure and everything I drive it fine for a day hesatint to do any pulls and today when I attempt at something small it does this could this be because I need a tune? I doubt there is anything wrong with the timing because the car has been running for a month now since rebuild
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Have you changed/checked your fuel filter? It sounds like under easy driving conditions everything is fine, but when you demand extra power (fuel/air) the engine starts to cough & splutter or bog down. I'm still thinking you have a fuel delivery issue. Did you actually test the fuel pressure at the rail? Obviously you got fuel coming in since the engine starts again, but is the pressure at or near factory spec?
-Icer
-Icer
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