Question about 1998 Nissan Altima

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1998 Altima Acceleration Problems

I saw your response to a similar thread, but never saw a conclusion as to what the problem really was.  My brother-in-law brought me his 1998 Altima to look at.  It is difficult to start but once started, idles fine.  If you accelerate slightly, the engine will rev to several thousand RPM.  However, if you accelerate just slightly more, the engine bogs down and returns to below 1000 RPM.  We changed the fuel filter on Autozone's recommendation, to no avail.  A local mechanic is now saying fuel pump, but that doesn't sound like a fuel pump to me.  As the engine heats, it begins to backfire through the air intake when you accelerate more than slightly.  It sounds to me like the timing is being advanced too much based on the acceleration (vacuum advance I assume).  There is no check-engine light though.  Thoughts?  The local mech wants $375 to change the fuel pump, which is fine if that's the problem.  I am not convinved though.

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I would say your problem is in the timing

Posted on Jan 29, 2009


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