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sgtsandman
Aircraft Fuel Tank Diver
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U.S. Military - Active
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- Joined
- Mar 11, 2017
- Messages
- 16,329
- Points
- 601
- City
- Aliquippa
- State - Country
- PA - USA
- Vehicle Year
- 2019
- Vehicle
- Ford Ranger
- Drive
- 4WD
- Engine
- 2.3 EcoBoost
- Transmission
- Automatic
- Tire Size
- 265/70R17
- My credo
- Anything that can go wrong, will go wrong. Plan for it as best you can.
I'm in a bit of a conundrum here being the issue is technically intermittent. When cold, the truck starts and runs fine. But if I drive it or let it idle for a bit and then shut it off, it will crank and pulse like it is trying to start, with an occasional stumble. It will stay that way until whatever is wrong cools down enough and then it will start, run, and drive just fine.
What I've done so far:
Fuel pressure is good static or running. The service manual calls for 60-65 psi and it sits right in the middle on the gauge. The fuel pumps seems to prime just fine, hot or cold engine. The fuse looks and test fine for continuity across the pins. Since the pump primes and will run the engine, I'm assuming the relay and the kill switch behind the passenger kick panel is fine.
The EDIS block tests fine for resistance across the primary pin and all the secondary pins as well as across the the paired sockets for the plug wires.
Since the IAC can cause start problems, I checked power to the valve as well as operation. 12 V to the valve and the valve opens when it has 12 V applied to the solenoid.
What I plan to do:
Check spark at each wire to make sure the wires are good and pull the plugs to make sure there isn't anything odd with them.
Check the crank sensor
Check the fuel injector resistance and use a noid light.
It would help if I had a PC/ED manual but I do not. Hopefully, the CD version of the manual I ordered will have it like the 2019 CD version does. The workshop manuals keep referring to that for troubleshooting, which is annoying since Helm claimed the manual set I got from them was a complete set and never offered any other options. It is not. I had to find and order the wiring diagram book separately, which I did a while ago. And apparently, the PC/ED book is separate as well.
What I've done so far:
Fuel pressure is good static or running. The service manual calls for 60-65 psi and it sits right in the middle on the gauge. The fuel pumps seems to prime just fine, hot or cold engine. The fuse looks and test fine for continuity across the pins. Since the pump primes and will run the engine, I'm assuming the relay and the kill switch behind the passenger kick panel is fine.
The EDIS block tests fine for resistance across the primary pin and all the secondary pins as well as across the the paired sockets for the plug wires.
Since the IAC can cause start problems, I checked power to the valve as well as operation. 12 V to the valve and the valve opens when it has 12 V applied to the solenoid.
What I plan to do:
Check spark at each wire to make sure the wires are good and pull the plugs to make sure there isn't anything odd with them.
Check the crank sensor
Check the fuel injector resistance and use a noid light.
It would help if I had a PC/ED manual but I do not. Hopefully, the CD version of the manual I ordered will have it like the 2019 CD version does. The workshop manuals keep referring to that for troubleshooting, which is annoying since Helm claimed the manual set I got from them was a complete set and never offered any other options. It is not. I had to find and order the wiring diagram book separately, which I did a while ago. And apparently, the PC/ED book is separate as well.
