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2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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Taylor Electronics
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May 5, 2018, 2:18 PM
Post #1 of 11
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2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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hello guys my wife have a 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl that we let our son and his wife use all the time. a few weeks ago he call and said he thinks the fuel pump is bad so he change it out it ran fair for a few weeks. so i get's it pull to my place. and it is a crank and no start situation i think i have spark because can open the butterfly a little bit and my propane turch to let gas in as the engine crank it trys to start. have no fuel pressure but fuel pump is good Thanks guys oh yes and the only code i able to pull up is u1000 and the fuel pump fuse is good
update i remove the hose from the fuel pump and turn the switch on and fuel came out from the connector of the fuel pump. under the hood i disconnected the gauge port and back at the fuel pump useing the larger hose and with an air hose i was unable to blow air through it. probably a safety measure. oh yes and behind the throttle body it is some sort of 12v check vale when 12v is applyed it open. this is my update Thank again
(This post was edited by Taylor Electronics on May 5, 2018, 8:38 PM)
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Discretesignals
Ultimate Carjunky
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May 5, 2018, 8:48 PM
Post #2 of 11
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Re: 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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If you clear the code, does it come back?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Discretesignals
Ultimate Carjunky
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May 6, 2018, 2:42 PM
Post #4 of 11
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Re: 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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Do you know if that code was there when the engine was running and didn't have the problem it does now?
This code is only stored in the engine ECU, correct?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 6, 2018, 2:45 PM)
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Discretesignals
Ultimate Carjunky
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May 6, 2018, 4:39 PM
Post #6 of 11
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Re: 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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If the engine ECU is storing a u1000, that probably means that it cannot communicate over the data bus. I'm sure you understand that the modules in this vehicle communicate over a bus network. This vehicle is equipped with a security system called NATS (Nissan Anti-Theft system). The anti-theft portion of the system is located in the BCM(body control module). If the engine ECU cannot communicate with the BCM, the engine will not start.
Basically, you need to figure out why the engine controller is unable to communicate on the network. You may need access to a scan tool that has the ability to communicate with other modules on the network to see who is active and codes they may storing. You will also probably need a network topology to see how the network is configured for troubleshooting.
Of course, this may not be the cause of your issue, but so far the u1000 is the only direction you have at this moment.
There is also a TSB out for the u1000 code. The only difference is that according to the TSB if there are no drivability issues, then that TSB applies. It states the check the engine ECU grounds. It probably wouldn't be a bad idea to voltage drop test the grounds for the engine ECU. Also inspect the battery grounds. The battery not only has to ground to the engine block but it also has to be grounded to the body.
I'm sorry I can't give you more concise information on how to troubleshoot your issue, but hopefully I gave you some clues on where to start.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Taylor Electronics
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May 6, 2018, 7:40 PM
Post #7 of 11
(2154 views)
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Re: 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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Hello Guys again here is an update i finely got the u1000 code cleared after i had tryed to blow throu the gas line with the air hose but never did. i put all of this back togather now the engine will start but it was hard to start. don't know if clearing the code or takeing the gas line aloose and puting it back to gather i don't know did not drive the vehicle at any time but it idle and ran a good half of day. and then out of the blue now it won't start it act like it is not geting enouth gas it is trying but won't start. Thanks guys
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Discretesignals
Ultimate Carjunky
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May 7, 2018, 6:45 AM
Post #8 of 11
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Re: 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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Do you have a fuel pressure gauge? What is the fuel pressure? It should be around 50 psi at idle speeds.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Taylor Electronics
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May 7, 2018, 1:16 PM
Post #9 of 11
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Re: 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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yes i have a fuel pressure gauge under the hood behind the throttle body in my words is a fuel port there is no pressure on it at all doing the time of cranking. but it is pressure on the line at the fuel pump because when i taken the line it was under pressure. it is like something is blocking it from coming to the fuel port. Thanks again
(This post was edited by Taylor Electronics on May 7, 2018, 2:21 PM)
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Discretesignals
Ultimate Carjunky
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May 10, 2018, 12:41 PM
Post #10 of 11
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Re: 2005 Nissan/Datsun Altima 2.5L SFI DOHC 4cyl
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Are you sure your gauge is connected to the fuel system? According the service information you have to disconnect the fuel supply line quick connect at the fuel rail. Then install a hose and gauge on the line. There is no port to screw a gauge onto.
Did that code return?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on May 10, 2018, 12:44 PM)
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