bigjayzway Posted December 5, 2007 Report Share Posted December 5, 2007 Ok I go out to the car this morning, start her up to get her warm. I go in the house for about 15 min,. come back out and the back end was so high up I started to laugh! She looks like someone added the wrong suspansion...lol Anyway, I get in the car, and the normal "service suspension soon" message is not there? I have replaced the positioning sensor twice, so I know it is not the sensor, rather a wire somewhere along the line. But this morning it was not there, and now the rear end is way up! Anyone know what could be done of this? It drives terrible, and if you hit a bump the rear end bangs, and feels like she will slide out to the side! Jay Life is too short to grow up! Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 5, 2007 Report Share Posted December 5, 2007 My 91 had an exhaust fuse, that provided power to the exhaust relay. My 91 would occasionally sit really high too. Not sure if your 98 has a fuse for the exhaust relay, but I would check your owners manual fuse listing. Are you getting freezing temps by you?, I would imagine you would be, since we were at 25 this morning here, that could be a problem also if you have moisture in your compressor Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Ranger Posted December 5, 2007 Report Share Posted December 5, 2007 Yeah, I would guess that it is not exhausting (venting). If you pull the DTC's, I suspect you'll find an exhaust valve related DTC. Link to comment Share on other sites More sharing options...
bigjayzway Posted December 5, 2007 Author Report Share Posted December 5, 2007 I have no codes at all. Life is too short to grow up! Link to comment Share on other sites More sharing options...
JimD Posted December 5, 2007 Report Share Posted December 5, 2007 My mind can imagine a scenario where the KEY ON test sequence runs the compressor and cycles the exhaust valve and the resulting voltages are in the "pass" range. But, the exhaust valve air vent is coated with ice. Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
bigjayzway Posted December 5, 2007 Author Report Share Posted December 5, 2007 The suspension exhausted today, and was great till the 4th time I started her up again. She now sits in the driveway fully extended again!? I went out and tried to start her up and see if it would go down, and it did not. I then pulled the fuse for the CVRSS and restarted her up, and nothing. I put the fuse back in, and she went down. She is down for now, but I know she will go back up as soon as I go out for a drive. Life is too short to grow up! Link to comment Share on other sites More sharing options...
Ranger Posted December 6, 2007 Report Share Posted December 6, 2007 Sure sounds like an exhaust valve problem. JimD may be on to something. Link to comment Share on other sites More sharing options...
Jeff Wilson Posted December 6, 2007 Report Share Posted December 6, 2007 Jay, I had the same problem as you about a year ago. The solution for me that worked was to replace the LR position sensor and to have the ride height recalibrated. Maybe Jim D will chime in again but If I am not mistaken the LR position sensor is the one that provides input to the air compressor thus making this part more expensive than the RR sensor. Link to comment Share on other sites More sharing options...
JasonA Posted December 7, 2007 Report Share Posted December 7, 2007 I think the problem is all the fuel in the oil from letting the car sit there and idle for 15 minutes. Jason(2001 STS, White Diamond) "When you turn your car on...does it return the favor?" Link to comment Share on other sites More sharing options...
Maximln Posted December 9, 2007 Report Share Posted December 9, 2007 I don't think that it would be an exhaust valve problem. The exhaust valve would activate if there was a big load in the car and then it was removed. Then the rear of the car would stay up. If it was not working, and there was no extra load in the vehicle, the rear suspension would only gradually go up from the key cycle, not all at once. It sounds like the position sensor is failing or the RSS module itself. If the position sensor was failing but giving inaccurate readings to the RSS module but were still inside the value range, that would cause you to get no codes. Likewise, if the RSS module began interpreting the signals incorrectly, I think it would still give you a no code situation since the module would still think its doing the right thing. Max Link to comment Share on other sites More sharing options...
WarrenJ Posted December 10, 2007 Report Share Posted December 10, 2007 Maybe you'll find some help here? Regards, Warren ALC_Description.doc There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises Link to comment Share on other sites More sharing options...
WarrenJ Posted December 10, 2007 Report Share Posted December 10, 2007 Here's the Troubleshooting Chart: Regards, Warren ALC_Chart.doc There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises Link to comment Share on other sites More sharing options...
bigjayzway Posted December 12, 2007 Author Report Share Posted December 12, 2007 Okay here is a stumper. My service suspension system warnig goes away when it is wet out, but the rear end goes way up in the air! STIFF and handles like crap! If I hit a pothole or slush it will toss my car to the side. When it is dry(hot or cold) it is fine, but the service suspension soon warning comes on! What the heck now??? I have checked all the connections, and my compressor does not shut off. I then have to disconnect the realy, and I get the limited to 90mph. I am totally lost here on what to do!? H E L P!!! Life is too short to grow up! Link to comment Share on other sites More sharing options...
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