QuestionQUESTION: Good Afternoon! To protect my investment, I replaced the timing belt, water pump & CV axles @ 160K. After 180K miles, my Quest began to stutter and loose power. My first thought was fuel pump. After replacing fuel pump, filter, distributor cap, rotor & throttle position sensor, It now won't even start. It is getting spark to the plugs and fuel to the rail. Do you have any other ideas before I quit putting money into it???? Thanks in advance. John
ANSWER: John,
Check the cap and rotor to make sure they are on correctly as aftermarket units usually are not to the quality of Nissan parts. I only purchase Nissan caps and rotors. I have been burnt too many times... Next, check for codes to make sure there are none. Autozone or Checker should rent you the tool or let you use it for free. Probably going to be the mass airflow sensor since they ussually fail and never set a code... But, check it with a volt ohm meter first as I do not want you purchasing it on my thoughts since I cannot see you car from here. You will need a volt ohm meter and get a Haynes Manual from the parts store for the test procedure.
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QUESTION: The only code that ever came up was 0300, multiple misfire.
It only appeared once and never again despite repeated tests
Someone also recommended that I disconnect the battery for several hours and that it would reset the computer. I appreciate your help. Have a great evening.
AnswerJohn,
Sounds like you have a bad crank angle sensor since you have the P0300 code. Also, you only need to disconnect the battery for about five minutes to bleed the power down on the computer to clear the codes. If you used a timing light you could crank over the engine and see if the engine actually fires when it should. On yours, since it has a distributor I would think the distributor itself is going out.
