Question about Nissan Altima

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Hi , i have a 01 altima , 2.4 liter, it will not fire , just turns over , wont start. i changed the crankshaft position sensor, still wont start, any ideas?

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Dont become a parts replacer-u cud stall urself--get car scanned or chec underhood for any changes like noises,bad wires... u may hav a failin gas pump or pressure regulator--cud hav worn plug wires or dist/module

Posted on Aug 24, 2010


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Posted on Jan 02, 2017


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I replaced my crankshalf sensor and now it wont start on 01 buick lesabre 3800s 2 engine?

Did you do a
Crankshaft Position System Variation Learn ?
The crankshaft position system (CKP) variation compensating values are stored in the powertrain control module (PCM) non-volatile memory after a learn procedure has been performed. If the actual crankshaft position system variation is not within the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set, refer to Diagnostic Aids for DTC P0300 .
The Crankshaft Position System Variation Learn Procedure should be performed if any of the following conditions are true:
• DTC P1336 is set
• The PCM has been replaced
• The engine has been replaced
• The crankshaft has been replaced
• The crankshaft harmonic balancer has been replaced
• The crankshaft position sensor has been replaced

May 06, 2017 | Buick Cars & Trucks

1 Answer

1998 Ford Explorer. 4.0 liter. SOHC Good fuel pressure. & good fire on plugs. Changed crankshaft sensor . Still wont crank, No fuel is getting thru the Injectors.

check for a problem cam shaft censor as well as a crank position sensor as both are required to be operational for the ECM to start the engine

Jun 25, 2016 | 1998 Ford Explorer

1 Answer

2004 altima will turn over but will not start

Hi Richie:
See if it fires with starting fluid if not you probably have a bad crankshaft position sensor which will cause no spark....So if it doesnt fire with starting fluid veirfy you have no spark then replace the crankshaft position sensor.

If you can see some check engine light on dashboar, could be some fault code stored in the PCM (computer); Well the proper way to correct this problem would be to have the code read. The code will probably tell you what system is keeping the car from starting. There are 100's of codes, so guessing the code will not work. I can suggest some checks to see if they help find the problem how ever. There is a cam and crank sensor. These items are the most common for no start conditions. I am not saying this is your problem, but I am saying this is something you can check. Unplug the sensor and look for oil in the connector part of the sensor. If you find oil in it, then it is no good and would need to be replaced.

Other test device that need to chesk is starter and ignition switch.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day

Dec 18, 2011 | 2004 Nissan Altima

1 Answer

Checked battery and was told cells where bad then replaced battery, then car wont start, then replaced starter - still wont start! any suggestions? its a nissan altima 2005 2.5 liter

I really need more information, does it turn over fine? If you turn the key and get nothing but a click, in some models there is a security system that cuts the power to the starter, in which case you would have to bypass the security system or take the car to a dealership to have it reset. If it turns over fine, check to see if you are getting fire to the plugs. If there is no fire going to the plugs, then you might have a bad ignition module or bad crankshaft sensor. Check to see if you are getting enough fuel pressure. Your timing could have jumped, if you are getting spark, gas, and have good compression, then the only thing left could be the timing. If you could give me more information I can tell you more. I hope this helps

Jun 08, 2011 | 2005 Nissan Altima

1 Answer

Need to know what fires coil 1995 mercury sable both wires to coil have power when key is turned on car cranks no spark from coil new coil what gives the coil extra power to fire

what engine? 3.0L 2 Valve? 4 Valve?
3.4L SHO engine?

The PCM (engine computer) fires the coils, but it is never the cause of a problem. I suspect it is the crankshaft position sensor on the front of the engine by the crank pulley. easy to change.

Crankshaft Position Sensor The crankshaft position sensor (CKP sensor) (6C315) is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft pulley and damper. The signal generated from the crankshaft position sensor is called the crankshaft position (CKP) signal, which provides base timing and crankshaft speed (rpm) information to the ignition control module (ICM) (12K072). Base timing is set at 10±2 degrees before top dead center (BTDC) AND IS NOT ADJUSTABLE. The powertrain control module (PCM) (12A650) will use this information with the spark advance information to determine ignition coil (12029) turn on or turn off time.

Sep 15, 2009 | 1995 Mercury Sable

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