MonteroShogun
New Member
- Joined
- Nov 16, 2018
- Messages
- 3
- Reaction score
- 0
- Points
- 1
- Location
- St Cloud, MN
- Vehicle Year
- 1988
- Make / Model
- Ford
- Transmission
- Manual
Hello, everyone. I need some help. I have a 88 Ford Ranger 2.9L 4x4. The high pressure fuel pump stop working out of the blue. I removed the high pressure pump and tested good. Then I reconnected the high pressure pump and then I found out that the high pressure pump is not getting power. I checked the fuel pump relay with the key OFF and the constant power (yellow cable) is reading 12V, then tested with the key ON and the constant power wire (yellow in my truck) and the ignition switch wires are reading 5-6V. Is there a chance that if the low pressure fuel pump went bad, that is causing the reading of 5V in the relay connector when the key is ON (I don't think so, but needed to ask) or... is there a chance that the PCM went bad ? Does the low pressure fuel pump (in the tank) is the one that makes noise when turn the key ON or is it the high pressure fuel pump the one that makes noise? Any help, suggestion will be really appreciated. Thanks in advance!