Question about Chevrolet Blazer

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Not sure if it is relay, it was running fine took off from a light and it just died. does that sound like relay switch or possibly fuel pump?

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That is a pretty wide area to cover. First off the model of the vehicle may help. For the most part fuses are rarely the cause of a vehicle just dying.
Some trouble shooting tips.
If you turn on the ignition do the dash charge and oil lights come on? If not the problem is electrical. Check the battery connections.
You can visually inspect the fuses. It is pretty obvious when they're blown. The wire that connects the 2 blades will be broken.
If the vehicle is fitted with a cambelt you'll need to check if it is still intact. A quick way of checking is to attempt starting the car. If the sound made by the cranking engine is not regular it could mean the belt has snapped. To be sure you will have to remove the cover that hides the belt. If the engine "locks up" ie you hear the starter just for a moment, or it just clicks you may have a broken cambelt and severe engine damage.
Also take a screwdriver with an insulated handle and remove one of the plug wires. Insert the screwdriver into the front of the plug wire and hold the metal part of the screwdriver about a quarter inch from the tappet cover. (Top metal part of the engine) Have someone crank the engine and check if you see a spark between the screwdriver and the engine. Careful not to touch the screwdriver. The shock is not deadly but nasty nonetheless.
If it is a carb fed model a tablespoon of gas down the carbuerettor will cause the engine to fire if the problem is fuel related.(You will need to remove the aircleaner for this. Fuel inction models need a pressure guage to have the fuel pressure measured since it is very diffycult getting gas into the inlet manifold.

Posted on Aug 20, 2010


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