 
     |
| Egr Solenoid Rebuilding? (Page 4/10) |
|
Notorio
|
AUG 29, 07:53 PM
|
|
| quote | Originally posted by Kitskaboodle:
Ok, I will check the other line tomorrow and report back. Thanks for no giving up on me. š
I really want to solve this problem!
Kit |
|
I eagerly await your results.  My GT also failed for high NOx, with a new cat, new O2 sensor, and new rings. 
|
|
|
|
Kitskaboodle
|
AUG 29, 09:08 PM
|
|
Ok, I did two more new tests today.
Test #1 / I disconnected the hard line/elbow under the throttle body, (that goes to the egr solenoid) I then plugged/capped it and then I checked for vacuum at the other end that goes to the egr solenoid. (it held vacuum solidly)
Test #2 / I then plugged the hard line/elbow back in, (that plugs in under the throttle body) then I connected my vacuum gauge to the other end of this same line (that goes to the other nipple on the egr solenoid) then I started the car, warmed it up, then I applied around 2200-2400 rpm revs and the vacuum gauge read around 10 hg.
And just for the heck of it, I tested the vacuum again (coming to the egr valve / with the engine running) and it still barely registers 2 hg at 2300-2400 rpm. (as a reminder, as I previously mentioned, the hard line going from the egr solenoid to the egr valve holds vacuum without issue)
Lastly, since someone mentioned this above, I did check the hose going to the booster and also the hoses going to the cruise control and both look ok.
Kit[This message has been edited by Kitskaboodle (edited 08-29-2022).]
|
|
|
|
Kitskaboodle
|
AUG 29, 09:12 PM
|
|
Ok, I did two more new tests today.
Test #1 / I disconnected the hard line/elbow under the throttle body, (that goes to the egr solenoid) I then plugged/capped it and then I checked for vacuum at the other end that goes to the egr solenoid. (it held vacuum solidly)
Test #2 / I then plugged the hard line/elbow back in, (that plugs in under the throttle body) then I connected my vacuum gauge to the other end of this same line (that goes to the other nipple on the egr solenoid) then I started the car, warmed it up, then I applied around 2200-2400 rpm revs and the vacuum gauge read around 10 hg.
And just for the heck of it, I tested the vacuum again (coming to the egr valve / with the engine running) and it still barely registers 2 hg at 2300-2400 rpm. (as a reminder, as I previously mentioned, the hard line going from the egr solenoid to the egr valve holds vacuum without issue)
Lastly, since someone mentioned this above, I did check the hose going to the booster and also the hoses going to the cruise control and both look ok.
Kit[This message has been edited by Kitskaboodle (edited 08-29-2022).]
|
|
|
|
skywurz
|
AUG 29, 10:56 PM
|
|
|
Alright so when you had your egr solenoid apart you could see through the nozzles on the cap?
|
|
|
|
Kitskaboodle
|
AUG 30, 08:53 AM
|
|
Yes!
I did check that as I had heard one person say theirs was clogged with āstonesā.
Also, donāt forget that I swapped out the egr solenoid from my 86 GT (which passed smog a few months ago) and Iām still having the same problem.
Kit
|
|
|
|
skywurz
|
AUG 30, 12:48 PM
|
|
go back to basics? this is the end all bible of the EGR IMHO https://www.fiero.nl/forum/Forum2/HTML/045528.html
shown in the diagram you can see the brass filter. In my case mine was clogged.
Have you tested for OL or shorts on the solenoids?
is it possible both solenoids are bad but you happen to have the fresh air inlet capped somewhere on your GT? This would force the EGR to function all the time.
|
|
|
|
Kitskaboodle
|
AUG 30, 08:49 PM
|
|
When I took the egr solenoid apart I donāt remember seeing a brass filter. 
I though I had verified that the twin port cap thingy was clear. Maybe I need to recheck it.
Check OL? What is that? No, I did not verify the copper winding continuity. I did resolder the ends of the copper wires where they attach to the connectors.
Getting more confused by the minute.,..,
Kit[This message has been edited by Kitskaboodle (edited 08-30-2022).]
|
|
|
|
skywurz
|
AUG 31, 10:22 AM
|
|
|
You should read through the full post I shared. OL is open loop meaning no connection on the coil.
|
|
|
|
Kitskaboodle
|
AUG 31, 10:09 PM
|
|
Ok, per BuddyCraigs thread, I did 3 more tests this evening:
All tests below were done with my ORIGINAL egr solenoid (that I had on my 85 GT) on my workbench and fully put back together. (that I failed smog with) To remind you, I took it all apart to clean, inspect, repair and then put it all back together. Since after I put it back on the car and was still not getting vacuum to the egr valve, I decided to put on the egr solenoid from my 86 GT since I know it is good.
Anyways, that one is still on my 85 GT.
These tests are to show if my original one is ok or not ok. (As I mentioned previously, I took it all apart but it looked mostly ok)
Ok, here we go.
Test #1 / Tested continuity at vacuum sensor (top two pins) and it registered a flat 0.0 ohms (i.e. OPEN)
Test # 2 / disconnected short vacuum hose that goes from egr solenoid nipple to vacuum sensor, then hooked up vacuum pump to hose that goes to the vacuum sensor, then while reading the ohmmeter readings from the top two pins, I applied about 5 hg of vacuum. The ohm reading went from 0.0 to about 0.6. When I disconnected vacuum gauge, it went back to 0.0 (of course)
Test # 3 / I probed the bottom two pins on the egr solenoid and it measured 95.0 ohms.
These figures seem to be inline with BuddyCraigs findings. I think my ohmmeter is a little better (and probably more accurate) I have an Innova model 3320.
Thanks, Kit[This message has been edited by Kitskaboodle (edited 08-31-2022).]
|
|
|
|
Kitskaboodle
|
AUG 31, 10:17 PM
|
|
Ok, per BuddyCraigs thread, I did 3 more tests this evening:
All tests below were done with my ORIGINAL egr solenoid (that I had on my 85 GT) on my workbench and fully put back together. (that I failed smog with) To remind you, I took it all apart to clean, inspect, repair and then put it all back together. Since, after I put it I was still not getting vacuum synthetic egr valve, I decided to put on the egr solenoid from my 86 GT since I know it is good.
Anyways, that one is still on my 85 GT.
These tests are to show if my original one is ok or not ok. (As I mentioned previously, I took it all apart but it looked mostly ok)
Ok, here we go.
Test #1 / Tested continuity at vacuum sensor (top two pins) and it registered a flat 0.0 ohms (i.e. OPEN)
Test # 2 / disconnected short vacuum hose that goes from egr solenoid nipple to vacuum sensor, then hooked up vacuum pump to hose that goes to the vacuum sensor, then while reading the ohmmeter readings from the top two pins, I applied about 5 hg of vacuum. The ohm reading went from 0.0 to about 0.6. When I disconnected vacuum gauge, it went back to 0.0 (of course)
Test # 3 / I probed the bottom two pins on the egr solenoid and it measured 95.0 ohms.
These figures seem to be inline with BuddyCraigs findings. I think my ohmmeter is a little better (and probably more accurate) I have an Innova model 3320.
Thanks, Kit
|
|
|
|