98 Deville has a hard ride. Not riding as smooth as a Caddy should.
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 98 Deville has a hard ride. Not riding as smooth as a Caddy should. in Past Cadillac Vehicle Discussion; Had my my rear air shocks replaced last year by a NARPRO.com shop but the car still rides kinda hard. ...
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    MadillacMan is offline Cadillac Owners Member
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    98 Deville has a hard ride. Not riding as smooth as a Caddy should.

    Had my my rear air shocks replaced last year by a NARPRO.com shop but the car still rides kinda hard. Seems like I can feel each bump and crack in the road. Did a push test on the front Struts and they responded well and didn't look like they needed to be replaced. Seems to me that it should ride better than it is now. Anyone have any idea's on how to make my ride smoother?

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    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    what shocks did they use -

    is the Electronic Level Control system still connected and working properly -

    does the car sit level -

    have you checked for Diagnostic Trouble Codes -

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    Ranger's Avatar
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.



    Maybe those are just stiff shocks.

    How about the level control system? Is the ass end high? Maybe I should first ask if they are air shocks.

    EDIT:
    Oops, Bass beat me, but we think alike.
    basscatt and basscatt like this.

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    MadillacMan is offline Cadillac Owners Member
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    The work order stated they are "Rear Auto Ride Control Shocks" I think I remember them saying they were AC/Delco replacements. When I took it back to them and said it wasn't riding like it should, they said they could try a separate aftermarket shock and see if that would help, I said no. Wanted to check here first to get some recommendations.
    The car looks level. Not high on the back end.
    No codes that I saw.
    Yesterday, just replaced the A/C blower motor and that was fun. Didn't see any codes when I went through them. Any specific ones I need to check or look for?

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    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    The A/C Delco shocks are rebadged Gabriel Hijackers, which are firmer than stock. I would recommend Monroe's.

    Does the rear sag if you have a couple of people in the rear?

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    MadillacMan is offline Cadillac Owners Member
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    Yes. That's what originally made me take it in. The work order said they found that the airbags had a leak in them, but after the new ones, I didn't see a noticeable difference.

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    MoistCabbage's Avatar
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    Turn the key to on, open the trunk, and you and a friend sit on the ledge.

    Does the ELC pump turn on after several seconds?

    Does the rear self self level?

    Does it stay level without the pump running?

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    MadillacMan is offline Cadillac Owners Member
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    Will try that and let you know. Will test later tonight when I get home.

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    thenaaks is offline Cadillac Owners Member
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    I could be wrong, but wouldn't the front struts affect ride quality more than the rear shocks? You sit closer to the front suspension than the rear, after all. How is your tire pressure? I just bled about 5psi out after it finally got hot here in Tennessee. The tires were sitting on 38psi cold.

    ----------

    I should clarify. I understand the rear shocks are half of the car's suspension, so they play an equal role. It's just my thinking that if you're feeling every bump, crack, change in the road surface, then it's more likely to be the front struts, or hopefully just overinflated tires.

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    MoistCabbage's Avatar
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    Quote Originally Posted by thenaaks
    I could be wrong, but wouldn't the front struts affect ride quality more than the rear shocks?
    Nope.

  12. #11
    aeronca36606 is offline Cadillac Owners Enthusiast
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    I hate to bash any brand of shocks, I have used Gabriel Hijackers for years in my 67 68 and 69 Eldorados and have nothing but praise for them. However i used Gabriel air struts in the rear of my 1985 Coupe Deville Diesel and after a few days they started to freeze up and got VERY Stiff. I would have suspected a bad batch except for having the same problem 8 or 9 years ago with another Deville diesel i owned.

    Stay with the Monroe air struts. I have never had a problem with them.

    It is a shame though as i like the Gabriel's design with the external boot shield a lot better.

  13. #12
    MadillacMan is offline Cadillac Owners Member
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    Tested the ELC. We sat on the end and the pump engaged. Seemed like it took for ever to level, but we could feel it lifting us. After about 3 minutes while the pump was still running we stood up and the pump stopped. We sat back down and the pump did not engage. So it seems like it is working.

  14. #13
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    Quote Originally Posted by MadillacMan View Post
    Tested the ELC. We sat on the end and the pump engaged. Seemed like it took for ever to level, but we could feel it lifting us. After about 3 minutes while the pump was still running we stood up and the pump stopped. We sat back down and the pump did not engage. So it seems like it is working.
    --------------------------
    After about 3 minutes while the pump was still running
    we stood up and the pump stopped.

    in theory - after running for 3 minutes - a VERY LONG time -
    the proper ride height should have been obtained -
    and the compressor should have stopped on its own -

    then - when you stood up -
    the rear of the car should have immediately raised -
    the ride height would have been higher than the proper level -
    and within a few seconds the exhaust valve on the compressor should have opened -
    so - you should have heard air escaping - and observed the rear of the car drop -

    if it didn't do all that - something is wrong -

  15. #14
    MadillacMan is offline Cadillac Owners Member
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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    Thanks for the detail. I have a meeting to go to, but will try again later and update this post.

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    Re: 98 Deville has a hard ride. Not riding as smooth as a caddy should.

    3 minutes is WAAAY too long. It should have leveled off in 20 seconds or so. You might check for a leak in the shock boot or one of the lines.

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