Replaced timing belt got tdc but still no start heard dull thud ? 180 out ? Crank sensor ?
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Replaced timing belt got tdc but still no start heard dull thud ? 180 out ? Crank sensor ?
https://www.askmehelpdesk.com/cars-t...le-303903.html
If you lined up the timing marks on the crankshaft and the camshaft properly, you can't be 180 degrees off--maybe one tooth. Make sure you properly set the tension on the T-Belt, while on the compression stroke, and properly torqued the tensioner pulley afterwards. The problem may be with the Crankshaft Position Sensor, Ignition Control Module (ICM), and/or coil. Check for spark.
Hopefully the "thud " isn't the pistol hitting the valves.How did you set the timing marks?
What caused you to replace the T-Belt--preventive maintenance, snapped belt, or blown head gasket?
What year, make, model, and engine?
. Check for codes.
. Check all under hood and under dash fuses with a test light or multimeter.
. Check for spark. If none, focus on the Crankshaft Position Sensor, Ignition Control Module (ICM), and coil.
. Check for fuel. Can you hear the fuel pump run, when the ignition switch is turned to ON?
Did you also line up the oil pump sprocket timing mark with the inner cover timing mark?
Attach battery and try to start the engine. Force new codes to be thrown, if necessary.
Since the truck was in an accident, you will also have to reset the Inertia Switch, which cuts off fuel to the engine during impact.
A failing ICM will allow you to see spark, even though it's firing at the wrong time. I've seen this many times. It would account for the backfire.
It's running? What did you do?
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