EGR valve

Hi, I am a new member to the group. My problem is my 96 explorer, the
EGR valve cause the check engine light to be on, which cause a failure
in New York State inspection. I have changed, valve, selonid and vaccum
lines, then cleared the computer. A few hours later the light came
back, this time the reading is, low egr vac. Could this be something
electrical.

grasshopper

No guarantee, but as far as I know, about 90% of the EGR-related failures
around this vintage are due to the DPFE sensor. It's fairly easy to test
with a vacuum pump and a scanner. In a pinch a crude DPFE test can even be
done with nothing more than a voltmeter and some 'smart' messing with the
throttle (engine runnig), forcing the computer to open the EGR valve.
Of course, it would have been cheaper (not to mention faster) to pay someone
with the proper equipment and knowledge to diagnose, but I do understand the
pleasures of throwing parts at at a problem -- have done it myself, more
than once. So since you have already replaced just about anything else, you
might try the DPFE now. But before you do, make sure that the tubes leading
to it are not clogged or reversed. Good luck!

By the way, I vaguely remember an 'extended warranty' or something like that
for these failure-prone DPFE's. Won't hurt to check if your '96 is still
covered.

"grasshopper" > wrote in message
oups.com...
> Hi, I am a new member to the group. My problem is my 96 explorer, the
> EGR valve cause the check engine light to be on, which cause a failure
> in New York State inspection. I have changed, valve, selonid and vaccum
> lines, then cleared the computer. A few hours later the light came
> back, this time the reading is, low egr vac. Could this be something
> electrical.
>
> grasshopper
>

Thank you Happy Traveler, I will get started on it right away, will let
you know the result.
Happy Traveler wrote:
> No guarantee, but as far as I know, about 90% of the EGR-related failures
> around this vintage are due to the DPFE sensor. It's fairly easy to test
> with a vacuum pump and a scanner. In a pinch a crude DPFE test can even be
> done with nothing more than a voltmeter and some 'smart' messing with the
> throttle (engine runnig), forcing the computer to open the EGR valve.
> Of course, it would have been cheaper (not to mention faster) to pay someone
> with the proper equipment and knowledge to diagnose, but I do understand the
> pleasures of throwing parts at at a problem -- have done it myself, more
> than once. So since you have already replaced just about anything else, you
> might try the DPFE now. But before you do, make sure that the tubes leading
> to it are not clogged or reversed. Good luck!
>
> By the way, I vaguely remember an 'extended warranty' or something like that
> for these failure-prone DPFE's. Won't hurt to check if your '96 is still
> covered.
>
> "grasshopper" > wrote in message
> oups.com...
> > Hi, I am a new member to the group. My problem is my 96 explorer, the
> > EGR valve cause the check engine light to be on, which cause a failure
> > in New York State inspection. I have changed, valve, selonid and vaccum
> > lines, then cleared the computer. A few hours later the light came
> > back, this time the reading is, low egr vac. Could this be something
> > electrical.
> >
> > grasshopper
> >