Hard crank-no start-backfire-grinding of starter-motor binding up-
Replaced the crankshaft position sensor-
But at this point the same symptoms happen unless the #8 plug wire is off the plug. In which case it will just crank right up. Any ideas?
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Hard crank-no start-backfire-grinding of starter-motor binding up-
Replaced the crankshaft position sensor-
But at this point the same symptoms happen unless the #8 plug wire is off the plug. In which case it will just crank right up. Any ideas?
Is this a v6 or v8 vortec? What year? What application? Modifications? Post tune. You left out alot of info. Is the starter good? Battery? Edit, sorry I see it is a V8.
Sorry-Quote:
Originally Posted by slows10
99 vortec 5.7- no mods-and yes new starter- precission mounted.
Check for clogged cats and for crank/cam timing.
My truck did the same thing. after beating myself up i found that a simple high quality cap and rotor cured it. It actually started binding during cranking, surging, missing like crazy...... about 20 miles after I replace the cap and rotor. after i went and purchased the Delco set it was fine. the cap will fail and allow for cross firing between cylinders through the inside of the distributor cap. I always carry a spare now for this very reason and never buy the off brands any more. same goes for my boat that did the identical thing as well.
Good luck.
check the dist cap. we had three in a row do exactly the same thing that your describing right out of the box. they can crossfire internally.