lothos Posted December 21, 2011 Author Report Share Posted December 21, 2011 The hesitation off idle could be plugged EGR tubes - have you cleaned them out? I cleaned and rodded out the tubes under the throttle blade. They were pretty clean to begin with which surprised me. I usually just start the car and go, but this morning I started the car and stood outside it and I noticed the exhaust was puffing. Instead of a steady stream of exhaust, it goes puff puff puff puff. The puff puff puff means a dead cylinder, right? Bad EGR or FPR cause this? Timing? Or should I be looking at a bad fuel injector? Looks like I'll be finding that section of my manual that covers the injector shutoff tests. WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
KHE Posted December 22, 2011 Report Share Posted December 22, 2011 Sounds like a misfire to me. A scan tool with a mistire counter would identify the suspect cylinder. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
the gold2 Posted December 24, 2011 Report Share Posted December 24, 2011 Yeah misfire or dud cylinder. Another car I own, non Caddy, had that same problem and shook alot also. Turned out to be one of the coil packs was dead. The exhaust was puff puff puff..... loose plug wire? bad plug (even if new), does your engine have coil packs? etc. Find which cylinder(s) is missing and go from there !! Have a good one ! Link to comment Share on other sites More sharing options...
lothos Posted December 29, 2011 Author Report Share Posted December 29, 2011 p.s. did you ever post the pics and procedure in your other thread regarding the pas key bypass?? http://caddyinfo.ipbhost.com/index.php?showtopic=40906 There's a first draft of the procedure, I still need to get photos WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
the gold2 Posted December 29, 2011 Report Share Posted December 29, 2011 Great start for the New year ! Link to comment Share on other sites More sharing options...
Luke Posted January 22, 2012 Report Share Posted January 22, 2012 I know this is from several posts back but, I have some experience in the area. The gurgling/bubbling you are hearing after turning the engine off is the coolant boiling from the engine into the overflow. I had the same thing on two 91 DeVilles I had. It's nothing to worry about, although, I'm not sure about long term implications. Turns out, radiator caps wear out and don't hold the right amount of pressure in the cooling system after time. A new radiator cap should get rid of the bubbling. It did for me! Link to comment Share on other sites More sharing options...
lothos Posted January 23, 2012 Author Report Share Posted January 23, 2012 I know this is from several posts back but, I have some experience in the area. The gurgling/bubbling you are hearing after turning the engine off is the coolant boiling from the engine into the overflow. I had the same thing on two 91 DeVilles I had. It's nothing to worry about, although, I'm not sure about long term implications. Turns out, radiator caps wear out and don't hold the right amount of pressure in the cooling system after time. A new radiator cap should get rid of the bubbling. It did for me! Thanks for the tip Luke. I've had the hood up while the gurgling was happening, and I didn't notice anything going on with the overflow tank. The gurgling noise is definitely coming from the heater core area. A radiator cap is cheap so I'll pick one up. WARNING: I'm a total car newbie, don't be surprised if I ask a stupid question! Just trying to learn. Cheers! 5% discount code at RockAuto.com - click here for your discount! Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.