Question about 1998 Chevrolet Blazer

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98' BLAZER will turn over and starts occasionally. will backfire and "clonks outs" most of the time is idling at 500 instead of 1G. When it does start you can idle it up in nuetral or park but when you shift it into reverse or drive it will start moving and will continue to move until you touch the gas, then immediately dies. any help is greatly appreciated.

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It sounds like something with the fuel/fuel flow system,maybe spark.It sounds more like lack of fuel.When it backfires,that is caused by too much air,not enough gas,and is called a lean mixture.You need to be careful and try not to let it happen as difficult as that may be.Lean mixtures burn hotter than a normal air to fuel ratio and I have seen it blow a hole right through the piston many times.If you are not getting far at all,it's probably the fuel pump.It is usually located on the top of the gas tank and is a b$#@h to get at.If you call a shop,they will give you a free opinion somewhere to attract future business,and if you want to self-repair,they may be willing to give some tips.I did mine a couple years ago,1995 Ford,different makes may have different locations.Good luck! Greg

Posted on Aug 21, 2010

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