Question about 2003 Nissan Altima

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I have a 2003 Nissan SL 2.5 4 cylinder Altima. The car was running fine and I purchased some gas and the next day it started vibrating and missing (not accelerating fast/like a hesitation). The guy at the auto parts store gave me an addative for the gas and I put a higher grade of gas in the tank hoping this would solve the problem. Days later the car is still vibrating. Today the guy at the auto parts store hooked it up to a computer and sold me the recommended dealer parts ( a CKP-crankshaft position sensor and vehicle speed sensor). He also recommended a mechanic who would charge about 155.oo to install these parts.They recommended a transmission flush for 120.00,but I read this was bad for the car and unnecessary. Does anyone know what the cause of this problem is with my Nissan and which is the most economical way to repair it....Any help or advice woud be greatly appreciated....conibea

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Today the guy at the auto parts store hooked it up to a computer and sold me the recommended dealer parts ( a CKP-crankshaft position sensor and vehicle speed sensor).

OK the problem is the CKP and no you dont want to do it yourself, it is a hassle. take the dummy cover off the motor, leaning over the engine take your right hand and basically hug the engine, down on the bottom just before the trans housing is a green and black connector. press the green connector (in) pull off the connector, now try to get a 10mm small ratchet down ther loosen the bolt (not easy)
take out bolt.
put the connector back on the sensor, twist and pull till it comes out.
the reson for putting it back on is nissan put the connector in the way of the 10mm bolt, you cannot pull it out withthe connector off.
the new sensor is a different updated design, its backwards,
when it goes back in the connector will be turned the opposit direction.
on a 1 -10 scale this is a 10 on the loss of patience a true 6 packer

Posted on Sep 03, 2010

Testimonial: "Thanks for the advice...I'm sure I won't do this repair myself..."

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