Question about 2007 Chevrolet Avalanche LTZ

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04 chevy avalanche , takes 2 times the rotations of starter to turn the engine over but still starts .. Changed plugs and wires and tips maybe fuel pump injectors?

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You are on the right track, the problem which is common is the fuelpump, the problem is , theres an internal antiflow valve the goes bad inside the pump, what happens is the fuel runs back into the tank and empties the lines and injector rail, when you go to start the truck it now take time for it to pnump fuel back through the lines to fuel rail and injectors and pressurize, so it take so cranking to get going. a little neat trick to be sure is to turn key on then off three times and then it should fire up, if it does then its the fuelpump, you will need to drop the tank and replace the fuelpump asm, the pump will still operate, we have customers that have had this problem for a couple of years and still havent repaired it due to the cost, they dont mind the long crank time to start, if you are going to repair drive until gas is about empty, this will help alot when its time to drop the tank,heres a picture of the fuelpump asm, hope this is helpful, have a good day.04 chevy avalanche , takes 2 times the rotations - johnjohn2_13.jpg

Posted on Nov 08, 2010

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