Thread: 99 Grand prix with flashing CEL

Results 1 to 5 of 5
  1. #1 99 Grand prix with flashing CEL 
    SE Level Member
    Join Date
    Jun 2011
    Location
    Cottage Grove MN
    Posts
    3
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    has anybody every had their car's theromstat go out, while driving it?

    This morning my check engine light started flashing at me, and my car started ideling funny while I was at a stop light, and when I got going, I didn't have much for power, but then the cel quit flashing and I had my power back, then the temp gauge started climbing... is it my thermostat, or could a intake have went out?
    Reply With Quote  
     

  2. #2 Re: 99 Grand prix with flashing CEL 
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    Usually a flashing CEL is a misfire. Technically the flashing means a catalyst damaging condition. How high did the temp raise?
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     

  3. #3 Re: 99 Grand prix with flashing CEL 
    SE Level Member
    Join Date
    Jun 2011
    Location
    Cottage Grove MN
    Posts
    3
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    it got to 210, but I also turned on the heater. This car never heats up past 180, and i have even had the thermostat replaced thinking it was bad.
    Reply With Quote  
     

  4. #4 Re: 99 Grand prix with flashing CEL 
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    The fan settings from the factory don't turn the low speed fans on until 216F and the high speed on at 228F. If you were sitting still as you say, likely the thermostat is fine because it didn't go very hot at all.

    I'd concentrate on the flashing CEL and aim toward spark plugs and wires to start off.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     

  5. #5 Re: 99 Grand prix with flashing CEL 
    SE Level Member
    Join Date
    Jun 2011
    Location
    Cottage Grove MN
    Posts
    3
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    It was the intake manifold (the upper intake plenum). Pulled it off and it was full of antifreeze. Got everything back together, but broke off a gas line fitting in the process. So need to get that fixed and change out the thermostat since its right there... and hopefully it will fire up!
    Reply With Quote  
     

Similar Threads

  1. Grand prix GT side skirts on 97 Grand Prix SE
    By Carnes97SE in forum How To Write-Ups/Tech Tips
    Replies: 6
    Last Post: 11-17-2013, 05:17 PM
  2. Finding Grand Prix parts or Grand Prix's in Junkyards near you!
    By MrPoopyButthole in forum Off Topic Discussion
    Replies: 8
    Last Post: 08-19-2012, 10:58 AM
  3. 1991 grand prix 3.1 swap into 1996 grand prix 3.1
    By mgosse in forum 3.1L V6 (LHO/LG8)
    Replies: 10
    Last Post: 07-20-2012, 06:54 PM
  4. Grand Prix GXP exhaust on a standard Grand Prix
    By JenniGP in forum General Tech Discussion
    Replies: 11
    Last Post: 03-29-2011, 10:15 PM
  5. Will a 04 grand prix 3800 engine fit into a 01 grand prix
    By jordan61488 in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 3
    Last Post: 12-24-2010, 01:01 AM
Tags for this Thread

View Tag Cloud

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •