Question about 1999 Chevrolet Blazer

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Valve spike,no exceleration,or power

Smooth idle can give gas in park it will take whi give when in drive i give it fule it wont take it and i get valve spike and loss of power what could cause this problem

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Check for clogged fuel filter. Hope this helps

Posted on May 25, 2009

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My truck wont start unless i prime the carborator first, then it wont stay running unless i rev it high just before i put it in gear, or im accellerating...


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I had the same problem with '99 GA I changed the idle control valve , solve the problem

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Only runs ruff during park and idle.


Your EGR valve shouldn't open up during idle or the engine will run rough and may even stall. Remove it and clean the plunger and port with a wire brush and some carb cleaner. Test the diaphragm with a vacuum pump. If it doesn't work after cleaning, or the diaphragm is bad, buy a new EGR valve.

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This definitely sounds like a fuel pump/filter issue. Good news if it's the filter, it's only about 10 dollars to buy a new one and about 5 minutes labor, including jacking up your car.

Fuel pumps cant be a pain in the arse at times, others are fairly easy. Best way to determine if it's the fuel pump, run over to Canadian tire and pick up an ohms meter. Test the fuel pump that way.

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Engine stalls or quits running upon excelerating


There is an idle air control valve that controls the idle rpm, which causes the nice smooth idle. When they go bad, it won't idle, jumping from hi rpms to low enough to cause the car to die. The ones that I've replaced were easy to access and replace, usually on the intake manifold area. This will also give you a check engine light. Beyond this, has the engine had a good tune up lately? To check this correctly you should check fuel pressure coming from the pump, check spark coming from distributor. Good luck. Colin

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