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My 1996 chevy s-10 blazer vin number W 4.3 liter v-6 vortec has spark good fuel preasure but stall when going down the road when it stalls still has spark and fuel preasure. but won't start until it cools down? one guy told me the EGR so i replaced it and it didn't work. any ideas

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  • rickgeroux Aug 07, 2010

    thanks ill see what happens



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Main reasons why an engine stalls:

Fuel filter clogged and/or water or impurities in fuel tank.
Faulty fuel pump and/or fuel pressure regulator.
Faulty or incorrectly gapped spark plugs wires.
Vacuum leak at the trottle body, intake manifold or vacuum hoses.
If spark plugs were changed recently, check for correct firing order, it is easy to mix the spark plug wires when changing plugs.

The ignition colis fail when hot, and some times only one end fails and the other works fine, when cool down, they both work again, check spark to all coil terminals.

Remove spark plugs, one at the time to check it's condition.

Use a fuel pressure tester to check fuel pressure when engine doesn't want to start to check fuel pump performance.

Good Luck, keep me posted!

Remove spark plug

Posted on Aug 07, 2010


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