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.