How To Test The Fuel Pump (2004-2008 3.5L Chevy Malibu And Pontiac G6)

TEST 2: Using Starting Fluid To Diagnose A No-Start Condition

Using Starting Fluid To Test For A No-start Condition Caused By A Bad Fuel Pump. How To Test The Fuel Pump (2004, 2005, 2006, 2007, 2008 3.5L V6 Chevrolet Malibu And 2005, 2006, 2007, 2008 3.5L V6 Pontiac G6).

In case you don't have a fuel pressure test gauge handy, you can use starting fluid to check to see if your Chevy Malibu (Pontiac G6) is not starting due to a lack of fuel.

It's not the most accurate way of testing a bad fuel pump but it can definitely guide you in the right direction. And I can tell you from personal experience that it's one of the first tests that I do when I'm testing a no-start problem.

IMPORTANT: For this test to give you an accurate test result, you need to make sure that all six cylinders are getting spark.

These are the test steps:

  1. 1

    Remove the intake air duct from the throttle body. You don't have to completely remove it, since you'll have to reconnect it in step 2.

  2. 2

    Spray starting fluid down the bore of the throttle body. After spraying a good squirt of starting fluid, quickly reconnect the air duct to the throttle body (you don't have to tighten the hose clamp).

  3. 3

    Have your assistant crank the engine once the intake air duct is back on the throttle body.

  4. 4

    You'll get one of two results with this test:

    1.) The engine will start momentarily and after a few seconds will die.

    2.) The engine will only crank but not start at all.

OK, let's find out what your results mean:

CASE 1: The engine did not start, not even momentarily. This test result confirms that the no-start condition is NOT due to a lack of fuel from the fuel pump.

CASE 2: The engine started but died after a few seconds. This test result tells you that your 3.5L Chevy Malibu's no-start condition is being caused by a lack of fuel.

More 3.5L V6 Chevy Malibu And Pontiac G6 Tutorials

You can find a complete list of 3.5L V6 Chevy Malibu (Pontiac G6) tutorials here: GM 3.5L V6 Index Of Articles.

Here's a list of articles you'll find there:

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