The 1991-1997 4.0L Ford Aerostar fuel pressure specifications.

4.0L Aerostar 35-45 PSI 30-40 PSI
4.0L Aerostar 35-40 PSI

KOEO = Key On Engine Off.

KOER = Key On Engine Running.

You can find the fuel pressure test explained in a step-by-step manner here:

Where To Buy A Fuel Pressure Gauge

The following fuel pressure test kits have the Ford Schrader valve adapter you'll need to connect the fuel test gauge to the fuel injector rail.

The following tools ARE NOT cheap knock-off tools, but inexpensive known automotive brand tools you can count on giving a long service life.

More Ford 4.0L Aerostar Tutorials

You can find a complete list of 4.0L Ford Aerostar tutorials in this index:

Here's a small sample of the tutorials you'll find in the index:

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