ken3983

it seems you can't find any of these anywhere for a 5.7L. My buddy has a solenoid from a 94 Cadillac put in it did I keep getting a code 32. I don't want to bypass it. Any other suggestions?I would like to find a compatible solenoid that would work if possible

Bob88GTA

iTrader: (2)

https://www.thirdgen.org/forums/sear...archid=8059343

ken3983

Isn't it possible, that the EGR solenoid is kind of like a check valve and the flow only goes one way? Maybe the vacuum lines are switched and that's why the EGR light is coming on.

Bob88GTA

iTrader: (2)

To answer your question....

The EGR Solenoid opens and closes many times on command. Short and long pulses, depending on what the computer calls for. Its either OPEN or CLOSED.

As for the plumbing, or tubing....the line from the EGR goes to the black plastic nipple.
The line from PORT (on the plenum) goes to the metal port on the solenoid. It still should not matter which.........confusing? Not really.

ken3983

Well I changed the vacuum lines around, and it was no change to the code 32. I disconnected the battery to get rid of any remaining codes. The next morning, the engine light came on once again. Now here is the weird part, the light only comes on in the morning when the engine is cold. The light will remain on as I am driving, but once I turn the engine off, the light will not come on the next time I crank the car up after the engine has warmed up. It also has a new EGR temp sensor in it as well.

Bob88GTA

iTrader: (2)

Did you test the EGR Valve and the Solenoid?

ken3983

EGR holds a good vacuum and the solenoid is new. It tested good also. I have a feeling that temperature related. Has a new egr temperature sensor in it as well.

Bob88GTA

iTrader: (2)

Gotcha. I guess you checked all the vacuum lines. Agree on Temp related

ken3983

Yep...all new vac lines on every thing. Didn't wanna take no chances. I'm thinking CTS maybe since it's a cold start problem

Bob88GTA

iTrader: (2)

Easy enough to check. Pull the connector of and use a DVM to check it. Check it cold

Use this chart.

ken3983

Awesome! !! Will def come in handy

ken3983

CTS tested fine. since the plug on this had to be changed in order to use this solenoid, is it possible that this solenoid has a different polarity? Perhaps the wires need changing around on the plug as it may be a signal issue rather than temp.

Bob88GTA

iTrader: (2)

The solenoid is normally open. The ECM grounds it during startup and cold temps, blocking vacuum to the EGR valve.

See this Thread:

https://www.thirdgen.org/forums/tpi/...-solenoid.html

ken3983

That's why I was wondering about the 2 wires going to the solenoid. the two wires might have to be switched around.the ECM might be sending a signal, but it's going on the wrong wire to the solenoid.

Bob88GTA

iTrader: (2)

you can try switching them and see what happens