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 kits you can count on giving you a long service life:
Disclosure: As an Amazon Associate, I earn from qualifying purchases. Buying through these links helps support this site at no extra cost to you. Thanks for your support —it really means a lot!
Fuel Pressure Specifications 4.0L Mazda B4000
| 1994-1995 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L B4000 | 35-45 PSI | 30-45 PSI |
| 1996 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L B4000 | 35-45 PSI | 35-40 PSI |
| 1997 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L B4000 | 35-40 PSI | |
| 1998-2002 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L B4000 | 55-72 PSI | |
| 2003-2009 | ||
|---|---|---|
| Engine | KOEO | KOER |
| 4.0L B4000 | 30-56 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:
- How To Test The Fuel Pump (Ford 4.0L Aerostar, Ranger, Explorer) (at: troubleshootmyvehicle.com).
More 4.0L Ford Ranger (Mazda B4000) Tutorials
You can find a complete list of 4.0L Ford Ranger (Mazda B4000) tutorials in this index:
Here's a small sample of the tutorials you'll find in the index:
- How To Test The Fuel Pump (1991-2011 Ford 4.0L Ranger And Mazda B4000).
- How To Test For A Blown Head Gasket (1991-2011 4.0L Ford Ranger And Mazda B4000).
- How To Test Engine Compression (1991-2011 4.0L Ford Ranger And Mazda B4000).
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