| 2005 Nissan Altima 2.5L No Start Condition 2005 Nissan Altima 2.5L
Changed Crank Sensor about 2 yrs ago when it started to feel like it would cut out on the highway. Has been fine
since then, until last month when it started intermittently. I would start it, it would run for a few seconds and die. If I
tried to restart it right away, nothing it would just crank. If I let it sit anywhere from 10 minutes to an hour it would
start. Then it got to be that it wouldn't start at all unless when I cranked it, the second the engine fired I had to hit
gas pedal, too soon or to late, engine would stumble and I would have to wait.
Being that I had already changed the Crank Sensor, I changed Cam sensor and seemed to do good for a month or so,
then back to same problem with intermittent starting. I made do, until last week when it didnt start at all. Found no
spark at all. I unhooked Crank Sensor, and car started. So I changed crank sensor, and it wouldnt start. I unhooked
Crank Sensor and it starts. I tried to drive it with crank sensor unplugged, but when I press the throttle, car doesnbt
respond. It sounds like engine RPM's go up a little, but no increase in speed.
Crank and Cam Sensor changed.
Nissan has told me that according to VIN, the ECM was already re-programmed due to a recall.
Security light does not come on when trying to start.
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 alkizmo
join:2007-06-25
Pierrefonds, QC
kudos:1 | Well, the crankshaft sensor is trying to prevent you to start because something is wrong.
Camshaft possibly.
I googled different combinations of basically: crankshaft sensor disconnect start
and found a rare few forum topics of people with different cars not being able to crank unless the sensor was disconnected, and the typical response was that there might be something wrong with the camshaft (not just the sensor!) and/or voltage/connection issue of the sensors. |
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 Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | reply to LeftOfSanity
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| Psst.....
Main relay (also known as fuel injection relay) |
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Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | said by TypeNameHere :Psst.....
Main relay (also known as fuel injection relay)
That's only a possibility if they have no fuel pressure. The OP needs to diagnose if they have no spark or no fuel at the engine when it is not starting while turning over.
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What’s the point of owning a supercar if you can’t scare yourself stupid from time to time? |
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| Key word that you must be missing....
intermittant
Crank and cam sensors work, or they don't.
fuel pump works, or it doesn't.
granted it *could* be an ecm, they do intermittant also....but after years of nissan main relay failures and rarely an ecm, well....math is ? |
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| reply to Doctor Olds
BTW
The main relay (or fuel injection relay) fires up the fuel pump, the ecm, the ignition, and quite a few other things such as the entire electrical system (save for the starter and alternator).
Hmm ? |
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| reply to LeftOfSanity
If the flywheel is bent or missing bots the cam sensor won't read and it won't start |
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| reply to LeftOfSanity
Re: 2005 Nissan Altima 2.5L No Start Condition The odd thing is if the sensor is unplugged it has spark and will start, but wont accelerate.
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"I'm against picketing, but I don't know how to show it" - Mitch Hedberg |
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| reply to LeftOfSanity
Still looking for any input.
I changed spark plugs just because it needed it anyway. Everything plugged in as normal, tried to start, just cranks.
I sprayed starter fluid into intake tube, nothing. Pulled spark plugs one and two, laid them next to engine metal, cranked and no spark.
one odd issue is when I had a helper turn the key to 'ON' without cranking and then turn it off, I heard a weird "electronic" noise from behind the engine, sounded like it was coming from, or behind the cabin wall.
The only way I can describe it is a very light 'screeching' noise, but it fluctuates, like a fax machine noise but much softer.
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"I'm against picketing, but I don't know how to show it" - Mitch Hedberg |
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| reply to LeftOfSanity
I tried to pull the OBD-II codes manually without a scanner using the accelerator pedal method.
It seems Im doing it right, the SES lights goes out and then flashes 4 times. I assume this is P1111 which is "intake valve timing control solenoid valve" ?
Would that cause no spark?
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"I'm against picketing, but I don't know how to show it" - Mitch Hedberg |
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Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | said by LeftOfSanity:the SES lights goes out and then flashes 4 times. I assume this is P1111 which is "intake valve timing control solenoid valve" ?
Would that cause no spark?
No, that is a different system.
You meed to diagnose why you have no spark when the sensors are all plugged in and yet you get spark back when you unplug one sensor. I would verify the sensors have the correct ohms values and are not open or shorted to ground.
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What’s the point of owning a supercar if you can’t scare yourself stupid from time to time? |
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| I am going to check that when i get home later tonight. I am also going to see if the coils are getting power with the key on.
It will only fire when cam sensor is plugged in and crank is unplugged. Wont start if crank is plugged in and cam is unplugged.
Seems odd since part of a recall was to reprogram the ECM to use the other sensor if one died.
Even when it does start, its not driveable. It will idle, but if I put it in gear and try to drive, it goes like 3 miles an hour no matter how far i press the accelerator.
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"I'm against picketing, but I don't know how to show it" - Mitch Hedberg |
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| reply to LeftOfSanity
Ok, I checked coils, all have 11.9v
Power is getting to the cam sensor, 11.9v
When I turn the key to the on position, all instrument lights stay on.
Battery, oil, brake etc.
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"I'm against picketing, but I don't know how to show it" - Mitch Hedberg |
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| My daughter came close to buying a 2005 Altima. When she took it out for a test drive, it stalled in traffic. It would restart but not run very well. Took it back to the dealership and they claimed it was fixed but did the same thing a couple of days later. Turns out it was the temperature sensor. Seems Nissan has a protective feature that when the sender senses a engine overheat, it automatically tirns the engine off. Can't say this will fix your car but its worth checking out.
John |
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| reply to LeftOfSanity
Ok it starting now, but there is no power/acceleration. I can hold the gas pedal to the floor and it goes about 5 miles per hour, but will slowly gain speed.
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"I'm against picketing, but I don't know how to show it" - Mitch Hedberg |
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Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | No power could be clogged exhaust/converter and or clogged fuel filter/bad fuel pump. You still have some diagnostics ahead of you unless you drive it to a Dealer or a shop.
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What’s the point of owning a supercar if you can’t scare yourself stupid from time to time? |
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| said by Doctor Olds:No power could be clogged exhaust/converter and or clogged fuel filter/bad fuel pump. You still have some diagnostics ahead of you unless you drive it to a Dealer or a shop.
Managed to drive it Autozone, they said I should take it to the dealer to get scanned.
They pulled stored codes:
P1031 - A/F Sensor 1 heater control circuit low
P0725 - Engine Speed signal circuit
But they might have been from me unplugging sensors.
Someone mentioned it sounds like it is running in 'Limp Mode' and I should try to reset/clear the ecu.
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"I'm against picketing, but I don't know how to show it" - Mitch Hedberg |
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Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | said by LeftOfSanity:They pulled stored codes:
P1031 - A/F Sensor 1 heater control circuit low
P0725 - Engine Speed signal circuit
Someone mentioned it sounds like it is running in 'Limp Mode' and I should try to reset/clear the ecu.
2005-2006 Nissan Altima Factory Service Bulletin OBDII Code P1031
»ww2.justanswer.com/uploads/badda···0691.pdf
Engine Speed Sensor P0725
»x.nissanhelp.com/forums/altima/1···elp.html
To reset the codes :
2002-2006 Nissan Altima Forums > F.A.Q 2002-2006
Reload this Page How-to: Read and Reset Check Engine/Service Engine Soon Light
»www.nissanclub.com/forums/f-q-20···ght.html
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What’s the point of owning a supercar if you can’t scare yourself stupid from time to time? |
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