How to troubleshoot Chevy fuel injector problems, step by step?

Place the red lead on one of the connector (not the injector) contacts and the black lead on the other contact. If you get a reading of between 1 and 2 volts, then the connector is working fine. Check each injector’s resistance through the electrical connector with a voltmeter.

Can a no start no fuel injector misfire?

No Start – No Fuel ‘Spider’ Fuel Injector Troubleshooting Case Study . This case study will help you diagnose a No Start No Fuel Condition with the ‘Spider’ injector. ‘Spider’ Fuel Injector Misfire and Hydrolock (Troubleshooting Case Study) .

How to troubleshoot the’spider’fuel injector assembly?

TIP 1: You’ll need a fuel pressure gauge to troubleshoot the fuel injector assembly on your GM 4.3L, 5.0L or 5.7L pick up (van, mini-van, SUV). TIP 2: You’ll be working around fuel (gasoline), which is extremely flammable. Your safety is your responsibility… so be careful, use common sense and think and act safety all of the time.

How to diagnose no start no fuel?

This case study will help you diagnose a No Start No Fuel Condition with the ‘Spider’ injector. ‘Spider’ Fuel Injector Misfire and Hydrolock (Troubleshooting Case Study) . This case study will help you diagnose a fuel injector (within the ‘Spider’) that’s stuck open and causing a Hydrolock condition.

What causes no power to fuel injector pulse?

Ans: The engine control unit is the electronic brain that used to control the fuel injector pulse by gathering data from various sensors along the fuel line Question: What causes no power to fuel injectors?

Is there no fuel from injectors to start truck?

No fuel from injectors to start truck. When I try and start my 93 Chevy Cheyenne k3500 no fuel come out of the injectors. If I use starting fluid the truck starts and the injectors work great. Has died a couple times while driving, but mostly runs fine and then won’t start one turned off.

Why is my Check Engine light on after installing fuel injection?

Most of the problems encountered while installing your fuel injection system or after a time of operation are very simple. If your check engine light is on you more than likely have a hard fault meaning something is grounded out, unplugged, operating out of range or has gone bad.

Why is my fuel injector not opening properly?

Often, if an injector cannot open it is due to faulty windings arising from overheating, a short out or a break. If the fuel injector doesn’t open and there doesn’t appear to be an issue with the windings the fault may be due to a build-up of rust.

What causes fuel to evaporate from a fuel injector?

Dirty Or Clogged Fuel Injectors This causes any fuel left in the injector to evaporate, leaving behind hard deposits, inside the injector. Over time, these will eventually block the injector. Leaking Externally Or Internally

Can a dirty fuel injector cause a misfire?

If you notice fluctuations with the RPM gauge on your dashboard there may be issues with your fuel supply. This can be attributed to a dirty fuel injector. If your engine is receiving an insufficient amount of fuel it is likely to misfire.

What causes PCM to disable fuel injectors?

@jrt2020 , Josh, The anti-theft system (Pass Lock) failure will mimic this, as anti theft tells PCM to disable the fuel injectors.

How does the CPI fuel injection system work?

Though the CPI system supplies fuel to each of the engine’s intake ports like other multi-port fuel injection systems, it has only one centrally located fuel injector, called the MAXI injector. Some bean counter at GM probably came up with the idea as a way to reduce costs.

When to replace the CSFI fuel injector assembly?

The CSFI does use a MAF sensor and the plenum is plastic and was used from 1996 on up on the 4.3L, 5.0L and 5.7L engines. Also, when anything fails in the CPI type system, you have to replace the entire fuel injector assembly. In the CSFI system, all parts can be replaced individually.

@jrt2020 , Josh, The anti-theft system (Pass Lock) failure will mimic this, as anti theft tells PCM to disable the fuel injectors.

What should the fuel pressure be on a Chevy Cheyenne?

93 Chevy Cheyenne k3500, if it is running the Chevy vortec engine the fuel pump pressure is way too low, should be 56 psi+ depending on CSFI/CPI system or it will not start or open injectors, with out the aid of starting fluid. The factory manual specifies that the fuel pressure for the CSFI system should be between 56-62 PSI.