1996 Chevy Silverado engine wont fire

Hello, if your saying, it cranks good but won't start and you have no spark at the plugs? You can take the coil wire loose from the cap, hold close to engine ground, have helper crank it while you watch for spark to jump from the wire to ground. If you have spark, the problem maybe the cap or rotor. If no spark, check the coil primary terminals. Pink is voltage, with the engine cranking, there should be a pulse on the white wires. If no pulse, possible problems wiring circuits--ignition module--crank sensor. You can also do an ohms test on the coil primary and secondary.

Can you check for codes? You can't check proper fuel pressure without gage.

i checked the crank sensor with my voltmeter and it was okay and also i do have a fuel pressure gauge and i checked it i got 65 psi of pressure. ill try to check coil for firing tmrw

well i pulled the coil wire off the disributor cap and grounded it had friend turn the engine over and no spark so im thinking its the ignition control module

well i had the module tested at oriellys auto parts and they said it was okay i went ahead and replaced the ignition coil and still no fire through the coil wire

Did you check the coil primary circuits like I mentioned? Is the coil wire, ok?

how do i check the coil circuits the only thing i checked was coil resistance and the 12 volt power wire to coil and module and it was getting 12 volts but ima test crank sensor and try a new coil wire today

i checked the coil wire it had 330 ohms

The coil wire sounds ok. The white wire at the coil should have a pulse, engine cranking. If you have a digital multimeter that has a tach--duty cycle or dwell setting, it should react to a pulse.

okay i hooked my test light to the white wire and it light very lil green like a bad ground turning the engine over made no difference isnt the white wire a tach wire?

Yes, It should be a dc pulse. My info shows two white wires coming from the coil. Both should have a dc pulse, engine cranking. I'd put a scanner on it that shows live engine data, crank the engine, look for an rpm signal on the scanner. Go from there.

theres a white wire then a white wire with a black stripe

Yes, engine cranking, both wires should have a pulse.

sry took so long to reply back but i messed with it more yesterday there isnt a pulse coming from the wires on testing the crank sensor do i test it on ac or dc and what should the voltage be?

Hello, refresh my memory, will you? What is the litre size of engine? Automatic-- v8?

5.7 (350ci) engine auto trans

also on the wires with engine cranking do i probe the purple wire or yellow wire

The crank sensor is a hall switch, three wires, pink is voltage goes hot when you turn on the key. Purple is ground. Yellow is the signal wire, with the engine cranking, a dc pulse on that wire.

kk well i replaced the cranksensor and still no fire i checked the white wire coming from ignition module and i got no pulse

The white wire doesn't come from the coil driver, it goes to the coil driver from the pcm. I'm not saying the pcm is faulty. Did you check the wiring circuits at the crank sensor?

where does the crank sensor wires go and how can i test the wires the only way i checked them was with a test light and the power wire was good. could the ecm cause it not to fire? cause im kinda worried it could be it cause last time i drove it the cable from the battery to fuse box was loose and it was acting up.

You might be able to use a digital multimeter, with the crank sensor plugged in, use a straight pin and back probe the signal wire, turn the key on, you don't have to crank. Have a helper turn the crank by hand, watch the signal, it should go from reference voltage to zero, back to ref, the signal would go back and forth as the crank is turned.

well i got it fixed it was the crank sensor connector so i replaced the connector with new one and went ahead and replaced cranksenor also drove down the road about 3miles everything seeemed okay then it started acting up like misfiring so i went to turn around and i smelled like something was burning and the truck shut off i got out and it smelled around the ecm so i tried to restart and im getting no fire again anyway the ecm could be shot???

Yeah, you need to find out what was burning?