Perg/misfire #6

[Panch]

Been running a 96 Ranger for a couple years. Purge flow sensor went off and I have replaced everything from the tank forward now I’ve got a misfire on six at higher speeds. WTF is it?

 

[sgtsandman]

Do you have any codes other than a misfire code?

 

[Panch]

1445.
Cat/egr/htr/o2

 

[Panch]

I have replaced fuel cap, filler neck, fuel pump seal, charcoal, canister, both purge sensors, EGR valve. And all airlines.

 

[sgtsandman]

1445 indicates a purge flow sensor circuit high condition.

meaning the Powertrain Control Module (PCM) has detected a voltage from the purge flow sensor that exceeds the expected range. This issue typically stems from a faulty purge flow sensor, damaged wiring or connectors in the sensor circuit, vacuum leaks within the evaporative emissions system, or a malfunctioning PCM. Common symptoms include the check engine light being illuminated, rough idling, poor fuel economy, and difficulty starting the vehicle. To diagnose the problem, inspect the purge flow sensor and its wiring for damage, perform a smoke test to identify vacuum leaks, and test the sensor's functionality using a multimeter. Repair options include replacing the purge flow sensor, fixing damaged wiring or connectors, repairing vacuum leaks, or reprogramming the PCM if necessary.

So, there is still something wrong in the purge system. The sad thing we are all running into that new parts are not always good parts, especially if they are aftermarket. Not, that we have much of a choice as time goes on and Motorcraft slowly stops making parts.

I hate to tell you to do it, but you need to go through everything you replaced and checked to make sure they are in fact good. Having a Powertrain Control/Emission Diagnostics manual (PC/ED) on hand to know what the proper voltages should be and when would be a great help. I recently had to dump more money than I wanted to into making sure I had that for my vehicles since the "complete set" I had previously bought was not in fact a complete set.

 

[Panch]

1445 indicates a purge flow sensor circuit high condition.



So, there is still something wrong in the purge system. The sad thing we are all running into that new parts are not always good parts, especially if they are aftermarket. Not, that we have much of a choice as time goes on and Motorcraft slowly stops making parts.

I hate to tell you to do it, but you need to go through everything you replaced and checked to make sure they are in fact good. Having a Powertrain Control/Emission Diagnostics manual (PC/ED) on hand to know what the proper voltages should be and when would be a great help. I recently had to dump more money than I wanted to into making sure I had that for my vehicles since the "complete set" I had previously bought was not in fact a complete set.

Where would you recommend I purchase this “completed set”?

 

[Panch]

Where would you recommend I purchase this “completed set”?

 

[Panch]

I have in fact replaced the high output three time now. Once I was able to warranty so that was nice.

 

[sgtsandman]

Where would you recommend I purchase this “completed set”?

With the age of these vehicles, Helm isn't making the manuals anymore. So, you are pretty much stuck with getting whatever ebay has to offer. That is what I had to do for the 2011. Helm only had manuals on a memory stick for the 2014 Escape, no paper manuals. I really don't like digital manuals but that is pretty much they only choice they are giving us now. The 2019 only offered a CD for the complete set. Only the wire diagram book was available in a printed format for that vehicle.

Keep in mind that the DTC codes only point in a direction for what the fault is. It doesn't take much to cause a wire issue or something else to throw the code. All the truck knows is that the component it is indicating is not working properly. It took me at least two days of meticulous troubleshooting on the 2019 to find out why the oil pressure sensor code was being thrown and the fuse kept blowing. For that truck, there are 5 or 6 different things on that circuit. It ended up being wires running to the electronically controlled clutch fan being the problem. The mount holding wires had failed, allowing the wires to drop down on the clutch fan mounting nut so they could rub through and short the system.

So, the problem may not be even directly related to what is throwing the DTC code. At least not logically. But since they are on the same circuit, it having the problem is causing the other thing(s) to have a problem. Thus why I was suggesting a complete manual set so you have wire diagrams and the PC/ED manual to tell you what the votlages should be, when they should be there, and which wire provides power, which is ground, and which is the control, if there is a control wire. Ford also likes to name things weird. I had no idea what they were naming in the circuit for the controller on the clutch fan, but it sort of made sense after I found the problem. It had a weird name like air flow control or cooling control. Something weird like that.

The problem I kept running into is that the Shop Manuals would refer to the PC/ED for component troubleshooting and the Haynes manual had no troubleshooting and told you to go to a shop. The wire diagram book tells you where the wires, connectors, and components are located, as well as the pin out for the connectors but no troubleshooting steps or reference voltages.

So, I'm not trying to be a wise guy or give you a hard time. I learned the hard way on what I'm recommending you get and why I'm recommending it. The parts cannon approach isn't working, though sometimes it becomes necessary to fix a problem and I have done it in the past myself.

We also like to save our fellow Ranger and RBV owners money. Sometimes, unfortunately, you have to spend more to get to the money saving part. It is also very difficult to troubleshoot a problem over the internet. We can't see what you are seeing. So we have to guess based on what we know about these trucks.

Since no one else has chimed in, I'm guessing they have not had the particular problem you are having. So have no suggestions on what to look for. I have not either. So, we offer the next best thing that we can other than taking it to a shop.