Question about 1999 Honda Passport

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STARTS HARD. CODE 300 MULTIPLE MISFIRES. 141K MILES

WILL GO DEAD. STARTS W/ JUMP.ALTERNATOR & BASTTERY SEEM FINE AS FAR AS OUTPUT. ENGINE LIGHT ON-- CODE 300 READS MULTIPLE MISFIRES. COULD THIS BE A TIMING BELT? 141K MILES.

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  • wmtsinc Jan 13, 2009

    after jumping,it also idles very high for a while, then goes down after a while.forgot to tell this earlier.

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I had this same problem and it ended up being the fuel pump regulator. Ran like a dream after I changed it.

Posted on Feb 26, 2009

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My first thought without viewing the codes is a camshaft sensor, But I will get back with code description. But thinking further, if your alternator has a bad diode or regulator and you battery goes dead, and you are certain your battery is ok, then it would have to be something like that, and the code is because your loosing power as your battery drains.


(1) have battery checked
(2) Alternator checked!
(3) an easy way to check is disconnect battery and see if it goes down. If it doesn't, then check alternator next.
(4) bad coil packs or crank sensor, vacumn leak, bad hose or disconnecter.
(5) bad wires.

Hope one of these helps. It is hard to diagnose this problem online.

Posted on Jan 13, 2009

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