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Fuel pressure specifications for the 4.0L V6 Ford Ranger and Mazda B4000.
Contents of this tutorial:
APPLIES TO: The fuel pressure specifications apply to the following vehicles:
- 4.0L V6 Ford Ranger: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011.
- 4.0L V6 Mazda B4000: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009.
Fuel Pressure Specifications 4.0L Ford Ranger
| 1991-1996 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L Ranger | 35-45 PSI | 30-40 PSI |
| 1997 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L Ranger | 30-45 PSI | |
| 1998 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L Ranger | 56-72 PSI | |
| 1999 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L Ranger | 55-65 PSI | 47-63 PSI |
| 2000-2001 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L Ranger | 56-72 PSI | |
| 2002-2011 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L Ranger | 60-65 PSI | 60-65 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.
