#Accurate 4 305 chevy starter how to#

This is due to the fact that when the Passlock system arms itself on your GM pickup or SUV, the engine will crank but won't start, since the PCM has disabled the fuel injectors. One of the things that can have you replacing a good fuel pump is an anti-theft system (PassLock) failure. Difference Between A Bad Fuel Pump And An Anti-Theft System (PassLock) Failure The next step is to confirm the exact fuel pressure with a fuel pressure gauge to be absolutely sure. This confirms that the fuel pump is starting to fail.

#Accurate 4 305 chevy starter how to#

The following tutorial may be of help: How To Troubleshoot A No Start (GM 4.3L, 5.0L, 5.7L).Д¬ASE 3: The engine started and stayed running.Verify that the ignition system is creating and delivering spark to all cylinders.Confirm fuel pressure with a fuel pressure gauge (if you haven't done so).This usually means that a lack of fuel IS NOT the reason your car is not starting. Since there's a good chance that the PassLock anti-theft system may have armed itself, take a look at this section: Difference Between A Bad Fuel Pump And An Anti-Theft System (PassLock) Failure.Д¬ASE 2: The engine did not start, not even momentarily. If you haven't done so already, the next step is to confirm fuel pressure with a fuel pressure gauge. This means that the reason your vehicle is not starting is due to a lack of fuel. OK, let's find out what your results mean:Д¬ASE 1: If the engine started and ran for a few seconds. You'll get one of three possible results with this test:ДЎ.) The engine will start momentarily and after a few seconds will die.Дў.) The engine will only crank but not start at all.ДЈ.) The engine will start and stay running.

Accurate 4-305 chevy starter