Holmsey Posted February 27, 2020 Report Share Posted February 27, 2020 I was driving today though a neighborhood only doing about 30 mph with my foot off the gas when it felt like the brake was applied and I heard a noise, by the time I turned down the radio it was gone. and the car was rolling fine. It happened again a few minutes later. When it happens it only last about 20-30 seconds. I parked the car in the driveway and don't want to do any damage by driving more. Looking for any insight to what it might be. Quote Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 28, 2020 Report Share Posted February 28, 2020 Is there a check engine light or message on the dash? You will need to check to see if any diagnostic codes are set. I believe you can check your codes through the dash on an 04. Go to the bottom of my post here and click the link, How to check for codes. Post all codes here and whether they are history or current Quote 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...
Holmsey Posted February 28, 2020 Author Report Share Posted February 28, 2020 No codes, I pulled the on board codes and they were clear,I meant to include that in the post. I was thinking possibility being a wheel bearing? It felt like it was the drivers side. Quote Link to comment Share on other sites More sharing options...
Holmsey Posted February 28, 2020 Author Report Share Posted February 28, 2020 The check Air bag message did come on today, not figuring that has anything to with it but I could be wrong. Quote Link to comment Share on other sites More sharing options...
BodybyFisher Posted February 29, 2020 Report Share Posted February 29, 2020 A wheel bearing that would slow the car like it was braking would make a racket all the time. I was thinking that you were getting a false ABS / Traction control engagement. As you know each hub bearing contains an ABS sensor. I was hoping you would find a code indicating an ABS / traction control problem. You checked all codes correct?, no codes at all? Quote 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...
BodybyFisher Posted February 29, 2020 Report Share Posted February 29, 2020 I reread your symptom, when you took your foot off the gas, it felt like the brake was applied and you heard a noise. What kind of noise? Does it feel as if you downshifted to say 2 on the shifter?, where the transmission hauls the car down? Quote 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...
Holmsey Posted February 29, 2020 Author Report Share Posted February 29, 2020 By the time I got the radio turned down it had stopped. It could of been the ABS? not sure. I'm going to be taking 1K+ trip in a couple of weeks and had it going in for Struts and shocks already. With a 116,000 on it I called the mechanic and told them to do the front wheel bearing also. Better to have it done here than being stuck at the mercy of someone in the middle of nowhere. I will update after it gets out of the shop. Thanks Quote Link to comment Share on other sites More sharing options...
Logan Posted March 1, 2020 Report Share Posted March 1, 2020 Could be.....the rubber intake plenum just starting to fail. Mine first stumbled after filling up......my first thought was bad tank of gas. I think the 2004 still had the same style rubber plenum as 2000-2003. Quote Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 1, 2020 Report Share Posted March 1, 2020 That is interesting @Logan , that it caused a stumble I suppose a sudden lean mixture would do that. Ill check the alldata tomorrow and see if this year still has the plenum. This eventually leads to a high idle correct? Quote 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...
Logan Posted March 1, 2020 Report Share Posted March 1, 2020 He's not really driving it......it will get worse pretty quick.....takes a little while to set the lean codes. But what he was doing......coasting......would be maximum engine vacuum at the time which a early stage failing coupler could suddenly start to cause a problem. He's at about the mileage they fail.....pretty sure the 04 is using that coupler. Mine was boggy...like bad gas. It would come and go some......as the coupler can sort of reseal itself. They dont just go to instant high idle. His description of a 20-30 second issue....is kind of what mine was doing. BodybyFisher 1 Quote Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 1, 2020 Report Share Posted March 1, 2020 @Logan that makes a lot of sense now for it to happen in a high vacuum situation when your foot comes off the gas. Quote 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...
Holmsey Posted March 11, 2020 Author Report Share Posted March 11, 2020 Just an update, got the car back from the shop, the mechanic said that the front driver wheel bearing was starting to freeze up that he could barley turn it. Replaced both fronts have driven it with no issues. With new Struts and Shocks it's become a pleasure to drive again. I appreciate everyone's responses Quote Link to comment Share on other sites More sharing options...
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