Im having trouble starting this 2000 4.3 blazer. Its my daily and has done this a handful of times. Its just cranks. i got fuel and spark. i dont have a fuel gauge tester so i dont the exact psi but it shoots out the Schrader valve. Cant even get it to start by spraying ether down the intake. the codes the popped up were P0338 which was a crankshaft position sensor circuit high duty cycle. i just replaced the crankshaft position sensor and no luck.

 

What codes do you have now?

Go borrow/rent a fuel pressure tester from the auto parts store and perform the 10 min fuel pressure leak down test.

Are you sure that the gas in the tank is good?

George

 

I will definitely do that thats one thing i haven't put a gauge on yet. It has been about 2-3 years since plugs and wires and distributor cap and rotor button just throwing that out there. As far as i know the gas is good its my daily so i get gas pretty often.