rangerrick747
New Member
- Joined
- May 16, 2015
- Messages
- 7
- Reaction score
- 0
- Points
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- Vehicle Year
- 2003
- Make / Model
- Ford
- Transmission
- Manual
2003 Ford Ranger 2.3L 4-Cyclinder, 95K miles.
Truck went dead. Engine turns over, but doesn't start. Plugs were found to have spark and the engine would run briefly if fuel was run through the throttle body.
No check engine light. Used code reader anyways and got no codes.
Thought it might be fuel related. Got a gauge on the shrader valve and found low presure (5-10PSI). Replaced Fuel pump and fuel filter, Pressure now eads 60PSI. Still won't start. We briefly bypassed the inertia switch by directly connecting the pump to the battery and the pump appears to run fine.
Replaced battery. Replaced air bypass sensor. Still no start.
Checked relays and fuses. Everything appears ok.
Checked inertia switch. Switch was ok, but reset it anyways. Checked voltage at inertia switch connectors, got 12V briefly with KOEO, but quickly went down to 6.8V thereafter. Checked continuity through inertia switch and it checked out.
Is the 6.8V reading at the inertia switch connector a concern or is that normal? Are we getting the needed voltage needed to the pump?
Maybe the PCM has bad, but how do you test it?
We also speculated the PCM may not be operating the Fuel injectors correctly. We did check voltage at the injector connectors with KOEO and found they were getting 12V.
Help needed and appreciated
Truck went dead. Engine turns over, but doesn't start. Plugs were found to have spark and the engine would run briefly if fuel was run through the throttle body.
No check engine light. Used code reader anyways and got no codes.
Thought it might be fuel related. Got a gauge on the shrader valve and found low presure (5-10PSI). Replaced Fuel pump and fuel filter, Pressure now eads 60PSI. Still won't start. We briefly bypassed the inertia switch by directly connecting the pump to the battery and the pump appears to run fine.
Replaced battery. Replaced air bypass sensor. Still no start.
Checked relays and fuses. Everything appears ok.
Checked inertia switch. Switch was ok, but reset it anyways. Checked voltage at inertia switch connectors, got 12V briefly with KOEO, but quickly went down to 6.8V thereafter. Checked continuity through inertia switch and it checked out.
Is the 6.8V reading at the inertia switch connector a concern or is that normal? Are we getting the needed voltage needed to the pump?
Maybe the PCM has bad, but how do you test it?
We also speculated the PCM may not be operating the Fuel injectors correctly. We did check voltage at the injector connectors with KOEO and found they were getting 12V.
Help needed and appreciated