94 Ranger 2.3L, DTC 332

[Mr.Doiturself]

I Have a 94 Ford Ranger with a 2.3L, manual Tarny 5 speed, 2 wheel drive.

Having problems isolating a DTC 332 code retrieved from Continues Memory which means Insufficient EGR Flow Detected from what i understand, unless someone else has a better or different description?.

This issue started 2 years ago, and back then checked vacuum hoses and replaced a few. Then at that time replaced the Pressure Feedback EGR Sensor which did not resolve the DTC 332 so decided ignore the issue till now.

So just the other day decided to tackle this problem so, re-checked vacuum hoses, all okay. Vacuum is present and vacuum pressure appears good at the EGR Valve while engine running.

Checked the metal tube from the exhaust to the EGR Valve and no cracks or leaks that I can tell.
So checked EGR Valve for movement when vacuum is applied and it moves OK. Replaced the EGR Valve anyway because thought it may be sticking a bit during driving. Well that did not resolve the issue.
Checked resistance on the EVR Solenoid and that appeared OK at about 32 ohms. But figured maybe it too was sticking mechanically so replaced it anyway. That did not resolve the issue either.

Anyone out there that can shed light on this issue?? I am starting to think that I may have got a Bad PFE Sensor to begin with.

 

[dmassey]

As I understand things, you should NOT have any vacuum at the EGR valve during idle so if you do have vacuum at idle, you need to check the EGR solenoid which is a hoot to get to. Located on the back of the engine between the engine and the firewall. Does your engine idle even or stumble? You also need to check to be sure the little orafice hole in the egr tube is open. If this is not open then the DPFE may not be getting enough pressure difference and be sending a message to the PCM to egr solenoid to route vacuum to the egr. Just a couple of ideas. Happy egr chasing.

 

[Bryan22]

could be the tube from the manifold to the valve is clogged inside, or the ports in the throttle body are all plugged up. every time I've had a bad DPFE the code is for voltage too high/low out of range.(327 or 337). I'd look more into a restriction in the system or check to make sure the two lines running from the egr tube to the DPFE are in good shape and not hooked up backwards.

if everything is opened and the egr isnt stuck you should be able to apply vacuum to the valve and just about stall the motor.