Question about the EGR valve
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Northstar Engines and System Technical Discussion Discussion, Question about the EGR valve in Cadillac Engine Technical Discussion; 1994 Concours 129,000mi I was coming home the other day, came off the highway the SES light came on and ...
  1. #1
    k63d400 is offline Cadillac Owners Member
    Automobile(s): 1994 Concours
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    Question Question about the EGR valve

    1994 Concours 129,000mi

    I was coming home the other day, came off the highway the SES light came on and the car stalled. It started back up, ran roughly for a few miles then was fine. Checked the PCM codes and it came up with:
    P036 ....................................... EGR valve pintle position out of range
    P043 ............................................... Left Oxygen Sensor Signal Rich
    P045 .............................................. Right Oxygen Sensor Signal Rich
    P095 .................................................. ...... Engine Stall Detected

    I pulled the EGR and cleaned it, replaced the gasket. My question is that even after I cleaned the EGR when i push the pintle all the way in it sticks open until you tap it a bit. I used brake parts cleaner and a brush but it still sticks open. Do I have to buy a new valve? I was thinking of using some thing that penetrates/lubricates like PB Blaster and then hose it out with the brake parts cleaner again. Will this damage the valve or engine if I do this?

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    BeelzeBob's Avatar
    BeelzeBob is offline I'm a Cadillac Fanatic!
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    Re: Question about the EGR valve

    Did you clean the shaft that the pintle valve rides on?? Usually the problem with the EGR valve sticking is deposits on the pintle shaft up inside the passage in the base of the valve. Use some carb cleaner or other solvent but do NOT let the solvent run down the shaft into the can of the valve or it will be ruined. Any harsh solvent will eat the insulation off the windings inside the can of the valve. Take the valve off and hold it right side up and spray out the passage to clean the pintle valve shaft thoroughly.

  4. #3
    k63d400 is offline Cadillac Owners Member
    Automobile(s): 1994 Concours
    Join Date
    Sep 2003
    Location
    Philadelphia, PA
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    Re: Question about the EGR valve

    I got the shaft the best that I could but i didn't use carb cleaner. I'll try it like that when I get a chance, also I'll see if I can get a smaller brush that can get in there better.

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