- Joined
- Jun 2, 2012
- Messages
- 25,363
- Reaction score
- 8,369
- Points
- 113
- Location
- canada
- Vehicle Year
- 1994
- Make / Model
- Ford
- Transmission
- Manual
The 1997 and earlier Rangers only used 30-40psi running fuel pressure, and key on one time should give you 10psi if it was 0psi which should be enough to get a startup or firing at least
But low fuel pressure at startup is the most common issue for long cranks and/or no starts
I would swap out ECT sensor just on speculation, this is what sets the Choke on cold start, or sets NO Choke on warm start
Either being incorrect would cause slow or no start
Watch CEL(check engine light), it should go OFF as soon as engine is turning, so as soon as starter motor is activated
This means computer is seeing the timing signal from crank sensor so will start spark and injectors
If CEL doesn't go off instantly then crank sensor may be failing or not inline with tone ring so not generating a good signal
Gas pedal on fuel injection is more of an air pedal, same as it was on carb engine, but with No Jets(or accelerator pump) opening the throttle doesn't add more fuel, just more air on a EFI engine
And computer doesn't add more fuel when you press down on gas pedal UNLESS engine is already running, above 400rpms
So if opening throttle helps with startup then clean the IAC Valve, it should be open all the way for start up, for max air flow, it may be sticking sometimes
But low fuel pressure at startup is the most common issue for long cranks and/or no starts
I would swap out ECT sensor just on speculation, this is what sets the Choke on cold start, or sets NO Choke on warm start
Either being incorrect would cause slow or no start
Watch CEL(check engine light), it should go OFF as soon as engine is turning, so as soon as starter motor is activated
This means computer is seeing the timing signal from crank sensor so will start spark and injectors
If CEL doesn't go off instantly then crank sensor may be failing or not inline with tone ring so not generating a good signal
Gas pedal on fuel injection is more of an air pedal, same as it was on carb engine, but with No Jets(or accelerator pump) opening the throttle doesn't add more fuel, just more air on a EFI engine
And computer doesn't add more fuel when you press down on gas pedal UNLESS engine is already running, above 400rpms
So if opening throttle helps with startup then clean the IAC Valve, it should be open all the way for start up, for max air flow, it may be sticking sometimes