Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
my truck will not start the first time you turn the key. it may take up to three times of turning the key before it starts. i have replaced the fuel pump, fuel filter, spark plugs, spark plug wires, and the fuel pressure regulator. what may be causing this?
Country: United StatesMake: ChevroletModel: Silverado 1500 HD LTYear: 2001Engine: 6.0 vortecAlready Tried: spark plug, spark plug wires, fuel pump and fuel filter
Does the starter engage and turn the engine over, just no starting?
yes it turns the engine over butt it may take a lot of cranking before it actually turns on. the very first time you turn the key it will crank but not start. when you let off of the key and turn it again is usually when the motor will start. but if you just hold on to the in the on position it will just crank and crank butt wont start
With a new fuel pump and regulator, we will assume fuel pressure is okay. This would normally be the cause of a hard starting problem such as the one you have. Testing fuel pressure would still be a good idea. When turning the key on, the pump should run for 2 seconds to prime the system. You should get 55-62 psi fuel pressure with the key on, engine off.If fuel pressure is okay then there are a few more things that could cause a hard start.A possible problem is a vacuum leak at the intake manifold gaskets, this would cause a lean condition and hard start.Another possibility is a weak crankshaft position sensor. If the crank sensor signal is weak, the PCM may not signal spark and injector pulse. The fix would be to replace the crankshaft position sensor. It is located on the passenger side of the block, the starter must be removed to access this sensor.If you would like any additional information or have more questions please don’t hesitate to ask!
i have read both your post .i would like you to try a test for me .when you believe the engine will not start. get a spray can of Berrymans carb cleaner. spray two seconds in to the intake just in front of the throttle body.open the throttle and spray into the intake. if it starts right up. you will most likely have a fuel problem. if it dose not then you will need to test for spark. that is harder so please post back your results .
Okay it started when i sprayer the carb cleaner into intake
new parts fail that's is why there are warranties . try the testing you may have a leaking injector
i like this spark tester