Rough Idle After Retiming. - Page 2
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Northstar Engines and System Technical Discussion Discussion, Rough Idle After Retiming. in Cadillac Engine Technical Discussion; Opv is spring loaded and will try and seal normally. U may get a whistle sound while motor is running. ...
  1. #16
    stoveguyy is online now Cadillac Owners Connoisseur
    Automobile(s): 96 STS, 140k
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    Opv is spring loaded and will try and seal normally. U may get a whistle sound while motor is running. I did change my intake due to leaky opv but I had a cracked mounting boss which was due to over tightening and when all was said and done, motor never idled poorly due to opv. No, I do not think ur rough running motor is due to intake issues.

  2. #17
    N*Caddy's Avatar
    N*Caddy is offline Cadillac Owners Master
    Automobile(s): 1997 Cadillac STS (BOSE w/AUX In, Massage Seats, URPAS, "Z")
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    Re: Rough Idle After Retiming.

    I actually saw a spark by the battery from the drivers seat and the P0300 code showed up
    That was the overpressure valve releasing, the one you were told of in the previous posts.

  3. #18
    joeycap is offline Cadillac Owners Member
    Automobile(s): 1996 Sedan DeVille
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    Re: Rough Idle After Retiming.

    Thanks for the replies. I was hoping it was something relatively simple, but as my father used to say, "Wish in one hand and crap in the other and see which one fills the fastest". Anyway, I'll have to wait until warmer weather arrives here in northern Illinois to drop the cradle. Even though I have a 30x40 outbuilding and a 125,000 BTU forced-air unit the building is uninsulated and if the heater runs continuously it never gets above 46 degrees and it's a waste of fuel IMO. I have my eyes on a '95 DeVille a friend of mine owns with only 70,000 miles. It depends on how much he wants to negotiate. He wants $3000, but I'm thinking more like $2500. He said there is no indication of head gasket issues, but mine only had 79,000 when I bought it in 2010 and look where I am today. Love the car though. Being 6'4" and 250 lbs., the large car is perfect.

    Thanks again for all of your wisdom and I hope 2013 is a wonderful year for all of you.

  4. #19
    stoveguyy is online now Cadillac Owners Connoisseur
    Automobile(s): 96 STS, 140k
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    Well your

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