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2007 Buick Lacrosse 100000 miles; car will cut when fuel drops to 1/4 tank; check gas cap light comes on and off; car will start right back up when fuel is added; check engine light is on. What problems could this be?
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your fuel gauge may be reading inncorect so you may be real low on fuel which explain why it try to cut off around corners or you have an idle air valve problem have thecodes scanned to see what the malifunction is
If the fuel gauge drops off when you are driving then its a sending unit problem that means you have to drop the tank and replace the float and sending unit. This is a common problem for alot of cars because of cheap gas. If you have to drop the tank check the fuel pump canster for dirt because of cheap gas. Replace the fuel pump strainer and fuel pump filter. If the car or truck has about 100,000 miles you might want to change the fuel pump at that time also just to cover your back. If you take it to a shop they will charge you at least $900 to start. But if you do it yourself it will cost you about $200 dollars maybe alittle more.
You need to Replace your Cas Cap. The Seal is bd on it and is allowing air into the Fuel Tank Causing Both Dash Lights. This should solve your Problem.
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