Question about 2002 Chevrolet Suburban 2500

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Help. 2002 chevy suburban LS flex fuel loosing power. will b driving and come to a stop light or have to slow down and it will die or become very sluggish, like not getting gas to engine. But then wait a few minutes and it starts up and runs. The voltmeter starts out above 14 the more u drive its goes straight up at 14. then when driving say 55 and want to pass it seem to not want to shift to passing gear and voltmeter drops to 12 and it reluctantly speeds up and voltmeter goes back to 14. Also for about 6 or so years at idle it sometimes seems it going to die RPM drop and then it saves itself. Just had new plugwires and 2 new cats puton. Also had alternator checked (good), and battery checked, its a 800cold cranking amp but showed 900. the guy said that was strange. Any help would be wonderful news. thanks.

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  • susan_haller Aug 02, 2009

    This is 1500 not a 2500 it does not have a carburator

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Most probable cause is a fuel filter is partially clogged. The charging system is ok, when the engine rpm slows down, the charging system will drop in voltage. Some vehicles have a minimum rpm speed required to bring in the charging system.

The 800CCA really doesn't mean that the battery cannot produce 900 amps. the 800 rating means that it will produce at minimum 800CCA.

Posted on Aug 02, 2009

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Hello Susan,

You have some sludge in your carbeurator which is causing this sporadic problem. Go to any auto parts store and get enough carbeurator cleaningg fuel additive to treat a tank full of fuel. One product that works well is called seafoam. There are others. Ask at the auto parts store which product they have which will do the trick.

Posted on Aug 02, 2009

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