Crank but no start, no spark, no injector pulse.
#1
Crank but no start, no spark, no injector pulse.
I have an 03 silverado 1500 5.3 automatic 2wd that won't start. Engine stalled while i was driving it. when i tried to crank it, it tried to start a couple times, and then any time since then, it just cranks and nothing happens. At first, I found code p0336 and cleared it. Hasn't showed up since, even just before i replaced the crankshaft position sensor.
I've replaced the fuel pump, fuel filter, crankshaft position sensor, maf sensor, map sensor, spark plugs, spark plug wires, and ignition switch.
I just bought this car 5 days ago and its was running fine. It has 253,980 miles.
I've replaced the fuel pump, fuel filter, crankshaft position sensor, maf sensor, map sensor, spark plugs, spark plug wires, and ignition switch.
- injectors are getting over 12 volts when key is on, but no ground, even when cranking.
- Coil packs are getting over 12 volts when key is on and are grounded good on drivers side engine block (checked with continuity tester)
- spark plug wires get 0 volts when engine is cranking
- good fuel pressure
- Tried resetting security system by turning on key for 10 minutes 3 times even though there is no security light on or blinking or icon.
- Checked all fuses and only my backup light fuse was out. Replaced.
- Swapped around working headlight relays to the other important ones even though i believe they all work.
- When replacing the ignition switch, i saw an orange wire that was cut in half. It runs up the shift lever, but i assume it goes to my tow haul button. Just to be safe, i touched the two sides together and tried starting the truck. It made no difference
I just bought this car 5 days ago and its was running fine. It has 253,980 miles.
Last edited by Joe_The_Guy; October 29th, 2021 at 3:05 PM.
#2
CF Monarch
I have an 03 silverado 1500 5.3 automatic 2wd that won't start. Engine stalled while i was driving it. when i tried to crank it, it tried to start a couple times, and then any time since then, it just cranks and nothing happens. At first, I found code p0336 and cleared it. Hasn't showed up since, even just before i replaced the crankshaft position sensor.
I've replaced the fuel pump, fuel filter, crankshaft position sensor, maf sensor, map sensor, spark plugs, spark plug wires, and ignition switch.
I just bought this car 5 days ago and its was running fine. It has 253,980 miles.
I've replaced the fuel pump, fuel filter, crankshaft position sensor, maf sensor, map sensor, spark plugs, spark plug wires, and ignition switch.
- injectors are getting over 12 volts when key is on, but no ground, even when cranking.
- Coil packs are getting over 12 volts when key is on and are grounded good on drivers side engine block (checked with continuity tester)
- spark plug wires get 0 volts when engine is cranking
- good fuel pressure
- Tried resetting security system by turning on key for 10 minutes 3 times even though there is no security light on or blinking or icon.
- Checked all fuses and only my backup light fuse was out. Replaced.
- Swapped around working headlight relays to the other important ones even though i believe they all work.
- When replacing the ignition switch, i saw an orange wire that was cut in half. It runs up the shift lever, but i assume it goes to my tow haul button. Just to be safe, i touched the two sides together and tried starting the truck. It made no difference
I just bought this car 5 days ago and its was running fine. It has 253,980 miles.
#3
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oilcanhenry (October 31st, 2021)
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