Hey all posted about this a year ago, I have a inline 6 that is showing a code 332- insufficient egr flow. Been all over this thing and can't find anything. Tested and replaced almost every sensor, replaced egr found a vacuum leak fixed it,thermo replaced cuz since this issue the engine slightly over cools. Weird thing is this code pops up before the engine is at temp, shouldn't occur till thermo opens once, cleaned and checked lines vacuum, egr ports, intake, throttle body I'm stumped. All temp sensors tested and replaced egr getting vacuum and signal, need some outside the box help here, thanks guys evr also replaced any help before this thing heads to ford would be nice, also heard that ford had this code pop for no reason on a lot of early 90s vehicles, not sure.

 

What year truck do you have?

Prior to late '95 to '96 the EGR feedback signal is positional not flow based.

 

It's a 93 and the evr has been replaced and the egr does open and function correctly evr(position sensor) is working properly

 

I've checked the signals on so many sensors on this thing my 9v needs replaced, still nothing I'm convinced at the point that PCM is acting goofy on me

 

EVR is the EGR Vacuum Regulator, it does not directly supply a feedback signal to the computer (PCM). The EVP (EGR Valve Position) sensor is the feedback mechanism.

 

Code 332 for your truck means "EGR opening not detected" Are you sure the vacuum lines are properly connected?

 

Found a pinched vacuum line

 

Found a pinched vacuum line on air bypass gonna replace see where I'm at

 

Two options to verify the EGR is opening. The first is putting a tee-fitting inline with the vacuum line running from the EVR to the EGR valve. Connect a gauge on that tee, then take the truck for a drive. Vacuum should be applied to the EGR under light throttle/cruise conditions. If there is no vacuum work backwards to the vacuum port on the intake manifold.

If you have vacuum then you can rig up your meter to measure the EVP output.

You are either missing vacuum, a stuck EGR valve or a bad EVP sensor.

 

Egr evp and evr all have been replaced this started with 332/334 and now have only 332 according to all 3 of my books is insuifficient egr flow. Found this pinched vacuum line coming off the air bypass(black other is red) don't know what exactly that does to affect egr but after I was convinced it was vacuum I tested the egr evp and evr after I realized throwing parts at it ain't working and all is good there. There is a hose off that bypass to the smog pump not sure exactly what this thing does to affect egr but seems like they'd go hand and hand, hope it works. Have a feeling it won't

 

Your books are wrong, there is no physical way for your truck's PCM to measure EGR flow, it's strictly positional. Later model trucks (late '95/96 and later) use DPFE style feedback which does measure actual flow.

For reference:

EVP

EVR

 

But wouldn't the flow be measured by position I mean every time I post this I get somebody telling me to test this crap and I have too many times and it turns into this I'm telling you I marked and watched that position and watched it move tested the vacuum on it I tested the signal that left it, that egr IS FUNCTIONING as it should also talked to a ford tech told me it is more likely the PCM correcting something else that's wrong told me egr code on obd1 is chasing my tail and throw money and time at it and see if it fixes it or bring it in and drop a few hundred on it cuz I'm so frustrated with it but thanks for telling me my ford obd1 is wrong I don't care the specifics egr code whatever it works. Every time Someone post egr on this site it's an argument.

 

An EGR system using an EGR Valve Positon (EVP) sensor is positional, nothing to do with flow. Stomp your feet all you want, it's a fact.

So now that you spewed out what you have already accomplished let me ask WHERE you measured the EVP signal and what were the values, in Volts DC, with the EGR closed and when it was fully open under driving conditions not with an external vacuum source.

As far as your "Ford Tech" goes I have never seen another problem that the PCM was trying to correct for then in turn cause a false Code 332. Not to say it cannot happen but very unlikely.

We are trying to save you money....

 

You've lured me in the with the t and vacuum under driving conditions I have to try that don't remember the test or where I did it at it's been awhile tested so much, I remember testing 2 diff places and everything was good one thing I can't get over is why do I get this code in first gear coming out of my driveway when the egr hasn't began to function yet? And goes on and off through driving almost like a cycle

 

Thinking about this more it's on out of the driveway off for the most part going 28 miles highway to work kicking on and off 2 3 times kicks off at temp but comes back. Feel like I am chasing my tail ya know