| Author | Message | ||
| Scott Gold (Scotttgold)
|
Ok, so do we agree that the SPC picture is the way that it should be? If it is, then what makes this electro different from the one that controls the cold start air valve? It looks just the same but it's connected to vacuum lines totally different. So what gives? Does anyone have a SPC picture of the cold start air valve electro? Scott | ||
| Steve Magnusson (91tr)
|
That SPC figure looks OK logic-wise (i.e., unfiltered air can never enter the vacuum source) although it's the reverse case of what I described earlier since the vacuum source is moved onto the "vent" end: unenergized -- the vacuum source is applied to the actuator (the EGR valve via the expansion tank) energized -- the vacuum source is blocked, and the EGR valve is vented. | ||
| William Masterson (Veloce)
|
 I have posted a copy of the image out of the spare parts catalog for 81 308s. It would indicate that the hoses on the electrovavle are not hooked up right. On the side of the electrovalve with the two inlets the hose should ge connected to the top inlet - the vertical one, not the horizontal one. The horizontal inlet is open to the atmosphere. | ||
| William Masterson (Veloce)
|
This is a copy of the page out of the spare parts book for 1981 308s. It would indicate that the present hook up for the electro valve is not right. On the side with two inlets the hose is on the wrong one according to the picture.  | ||
| magoo (Magoo)
|
Herb, that is true. Then shortly after being a new car, it deteriorates from the heat of the engine and falls off. | ||
| Herbert Edward Gault (Irfgt)
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On G.M. cars there is usually a small rectangular foam filter on the vent tube end. | ||
| Scott Gold (Scotttgold)
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Ok, thanks for the input! I'm going to run the lines just like the cold start electro. I knew something was wrong, this configuration was this way since I got the car. I guess the previous owner didn't even question if it was right. Well, I'm glad I've got it right now. Thanks for all the help. | ||
| magoo (Magoo)
|
Steve, I agree, every one I have ever seen even in other applications such as G.M. hooks it up as you have explaned and the metal tube, vent, is always left open. My 79 308 hooks up that way and the metal tube is exposed. Scott I know it doesn't look right and you feel you should stick something on the exposed metal tube but thats the way it is on all applications of using that type valve that I have seen. | ||
| Steve Magnusson (91tr)
|
Actually Scott, the way it's plumbed now doesn't make much sense -- seems to me that the electrovalve is totally ineffective regardless of incoming electrical signals since: if unenergized, the vacuum line going to the EGR valve (via the expansion tank) would be blocked by the internal piston (i.e., no vacuum on the EGR valve actuator), and if energized, the internal piston would shift blocking the "vent" fitting (which in this case is plumbed as the vacuum source) so there'd still be no vacuum on the EGR valve actuator. I think in almost every use of this type of electrovalve the vacuum source connects to the front plastic fitting, the thing being actuated is connected to the top plastic fitting, and the (metal) vent fitting is left open (but someone else or the SPC should be able to confirm this). | ||
| Scott Gold (Scotttgold)
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Oh I don't have a catalog and my owners manual doesn't have a good picture at all. | ||
| '75 308 GT4 (Peter)
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SPC = Spare Parts Catalogue | ||
| Scott Gold (Scotttgold)
|
Whats the SPC? | ||
| Steve Magnusson (91tr)
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Doesn't look right to me as this configuration would allow unfiltered air into the intake manifold when the electrovalve is unenergized -- does the SPC show it this way? | ||
| Scott Gold (Scotttgold)
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| Scott Gold (Scotttgold)
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Now all you remember my post "Electrovalve not hooked up right???" Well, here goes another. This electrovalve looks identical to the one that operates the cold start air valve, but for one exception. It's vacuum lines are hooked up totally different. Can anyone make any sense out of this. Look at the cold start electro, and then look at the EGR electro. Same electro, different vacuum configuration.   |