Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

Results 1 to 3 of 3

Thread: intake and top cover 94 Seville STS 4.6

  1. #1
    Join Date
    Dec 2008
    Location
    Palmerton, Pennsylvania, Unite
    Posts
    30

    Unhappy intake and top cover 94 Seville STS 4.6

    I just bought a 1994 Seville STS with a 4.6 it has a hesitation the check engine lite is on I have a code p046 I was reading other post and was trying to check for a intake leak so I took off the top cover looks like there some oil in there (not a lot) so I tried to start the engine and it revved up real high I was trying to check for a intake leak is this normal I red in another form you can run the engine with out it but not recommended can some one tell me if this is the right way to check for a leak I was going to use carburetor cleaner . Any help would be appreciated thanks Tom


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    69
    Posts
    82,286

    Re: intake and top cover 94 Seville STS 4.6

    The oil you see in there is normal. It is a combination of crankcase gases from the PCV and exhaust gases from the EGR. NEVER start a '93/'94 Northstar with the manifold cover off. The engine will runaway unthrottled as you experienced and bounce off the rev limiter. It's just like flooring it in neutral. Not good. Check for a vacuum leak by spraying Brakleen or carb cleaner around the manifold cover seal and listen for an RPM increase. While you are in there rod out the EGR passages aka "mouse holes" and clean the TB.

  4. #3
    Join Date
    Dec 2008
    Location
    Palmerton, Pennsylvania, Unite
    Posts
    30

    Re: intake and top cover 94 Seville STS 4.6

    Thank you RANGER


Bookmarks

Cadillac Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Kia Forte Forum