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Phil 1/5/2019

1999 Mercury Grand Marquis LS 8 Cyl 4.60L


Car won't start without starter fluid

Car won't start
When starter fluid is sprayed in intake car starts.
Car runs as long as I spray fluid into intake
when I stop spraying fluid in intake car stall out
Maybe fuel filter or fuel pump?

1 Answer


Jimm 1/5/2019

Maybe, but before condemning either part and wasting money and time - simply perform some basic tests. First, peform a visual test - closely inspect the air intake system for any cuts, cracks, damage.

Use a fuel gage (available from any local auto parts store as a free loaner tool, or a small fee) to measure the fuel pressure at several locations; first - at the fuel pump outlet, second at the fuel rail - on the engine upstream of the injectors.
For this purpose, there is a small valve or port located on or near the fuel rail itself to perform the test.

You want to note the specific fuel pressure at each location in the fuel system to see if there is any pressure loss. Test with the key 'on', the fuel pump 'on' and the coil wire disabled / removed so the engine will not start.

Loss of pressure - or no pressure - means to look into the reason at that point. Could very well lead you to replace the fuel filter, and/or the fuel pump - but there could be other concerns or issues.

Try these on-line parts resources; www.autopartsanything.com; www.partsgeek.com; www.Rockauto.com, www.stockwiseauto.com - to list only a few.

In fact, they (RockAuto) list the replacement fuel filter from around $1.90 each, and the fuel pump from around $49.00 each for your vehicle.

Fuel filter = HASTINGS part #GF326


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