greenida Posted February 16, 2010 Report Share Posted February 16, 2010 I have a 2001 sls that if you are sitting still in cold weather and tap on the gas it will surge forward 2 or 3 times. It is sometimes stalling every once in a while. Any ideas? Link to comment Share on other sites More sharing options...
CarlaValentine Posted February 16, 2010 Report Share Posted February 16, 2010 Does this surging happen when it's in park or when it's in gear? You should pull the Diagnostic Trouble Codes and post them. They are usually very helpful in figuring out what the problem is. If you don't already know how to do it, here's a link that will tell you how. http://www.caddyinfo.com/readingcodes.html Link to comment Share on other sites More sharing options...
greenida Posted February 17, 2010 Author Report Share Posted February 17, 2010 Does this surging happen when it's in park or when it's in gear? You should pull the Diagnostic Trouble Codes and post them. They are usually very helpful in figuring out what the problem is. If you don't already know how to do it, here's a link that will tell you how. http://www.caddyinfo.com/readingcodes.html It does it when in gear. It also seams to idle a bit fast. When cold it almost jumps a little when going from park to reverse. Link to comment Share on other sites More sharing options...
Ranger Posted February 17, 2010 Report Share Posted February 17, 2010 Have you checked for a ripped plenum? The plenum is the rubber coupler between the TB and the manifold (on 2000+ Northstars). They tend to rip on the bottom where it can't be seen. Spray some Brakleen or carb cleaner or such around there and listen for an RPM increase. Link to comment Share on other sites More sharing options...
Texas Jim Posted February 17, 2010 Report Share Posted February 17, 2010 Have you checked for a ripped plenum? The plenum is the rubber coupler between the TB and the manifold (on 2000+ Northstars). They tend to rip on the bottom where it can't be seen. Spray some Brakleen or carb cleaner or such around there and listen for an RPM increase. Ranger, Do the newer ones (like mine) still use the rubber plenum? Link to comment Share on other sites More sharing options...
greenida Posted February 17, 2010 Author Report Share Posted February 17, 2010 Have you checked for a ripped plenum? The plenum is the rubber coupler between the TB and the manifold (on 2000+ Northstars). They tend to rip on the bottom where it can't be seen. Spray some Brakleen or carb cleaner or such around there and listen for an RPM increase. Thanks, will check it. Replaced the fuel filter last night. I think it was the original (104,000 mi.). Thought that would be a good idea for $13. Don't know if it will help, but I know it wont hurt. Link to comment Share on other sites More sharing options...
Ranger Posted February 18, 2010 Report Share Posted February 18, 2010 Have you checked for a ripped plenum? The plenum is the rubber coupler between the TB and the manifold (on 2000+ Northstars). They tend to rip on the bottom where it can't be seen. Spray some Brakleen or carb cleaner or such around there and listen for an RPM increase. Ranger, Do the newer ones (like mine) still use the rubber plenum? Not sure Jim (but I think so). I've never had the opportunity to peek under the hood of an '06 or newer. Should be pretty easy to stop though. Have a look and let us know what you find. Link to comment Share on other sites More sharing options...
Texas Jim Posted February 18, 2010 Report Share Posted February 18, 2010 Have you checked for a ripped plenum? The plenum is the rubber coupler between the TB and the manifold (on 2000+ Northstars). They tend to rip on the bottom where it can't be seen. Spray some Brakleen or carb cleaner or such around there and listen for an RPM increase. Ranger, Do the newer ones (like mine) still use the rubber plenum? Not sure Jim (but I think so). I've never had the opportunity to peek under the hood of an '06 or newer. Should be pretty easy to stop though. Have a look and let us know what you find. OK...will do. Mine has suddenly developed a taste for gasoline. It is running as smooth as silk, but fuel consumption has suddenly gone up a little above normal. Also, the engine fuel shutoff, when decelerating, very seldom works anymore. You don't really have any engine braking when decelerating from highway speeds. Up until a week and a half ago.. it was all ok. I can start a new thread if it would help. I know EXACTLY when it happened and what I was doing at the time. I can describe in better detail, if necessary or if it would be helpful. Link to comment Share on other sites More sharing options...
greenida Posted February 18, 2010 Author Report Share Posted February 18, 2010 Have you checked for a ripped plenum? The plenum is the rubber coupler between the TB and the manifold (on 2000+ Northstars). They tend to rip on the bottom where it can't be seen. Spray some Brakleen or carb cleaner or such around there and listen for an RPM increase. Ranger, Do the newer ones (like mine) still use the rubber plenum? Not sure Jim (but I think so). I've never had the opportunity to peek under the hood of an '06 or newer. Should be pretty easy to stop though. Have a look and let us know what you find. OK...will do. Mine has suddenly developed a taste for gasoline. It is running as smooth as silk, but fuel consumption has suddenly gone up a little above normal. Also, the engine fuel shutoff, when decelerating, very seldom works anymore. You don't really have any engine braking when decelerating from highway speeds. Up until a week and a half ago.. it was all ok. I can start a new thread if it would help. I know EXACTLY when it happened and what I was doing at the time. I can describe in better detail, if necessary or if it would be helpful. I'm not sure how to read the multiple windows and if that last reply is still talking about my 01 sls but it does sound like mine. need more info. My wife called me with check engine light on and it had stalled a few times. No codes that mean anything. Thanks Dave Link to comment Share on other sites More sharing options...
Jan Olsson Posted February 18, 2010 Report Share Posted February 18, 2010 What codes do you have? I was thinking that the stalling possibly could be related to the CPS (crankshaft position sensors). It's a common problem for your model year, easy to change but can be harder to diagnose because it can take a while before the PCM sets a code. My car started to die at idle and light throttle, eventually it throw a code. It is also possible that you have a vacuum leak as suggested earlier. Post your codes, history and current. Link to comment Share on other sites More sharing options...
Jan Olsson Posted February 18, 2010 Report Share Posted February 18, 2010 Perhaps it's time to clean the EGR, throttle body and throttle plate. Don't forget the air passage for the IAC (Intake Air Control)? Link to comment Share on other sites More sharing options...
greenida Posted February 18, 2010 Author Report Share Posted February 18, 2010 What codes do you have? I was thinking that the stalling possibly could be related to the CPS (crankshaft position sensors). It's a common problem for your model year, easy to change but can be harder to diagnose because it can take a while before the PCM sets a code. My car started to die at idle and light throttle, eventually it throw a code. It is also possible that you have a vacuum leak as suggested earlier. Post your codes, history and current. Thanks, will try to get those codes posted tonight. Link to comment Share on other sites More sharing options...
JimD Posted February 18, 2010 Report Share Posted February 18, 2010 ....Don't forget the air passage for the IAC (Intake Air Control)? "Idle Air Control". Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
Jan Olsson Posted February 18, 2010 Report Share Posted February 18, 2010 ....Don't forget the air passage for the IAC (Intake Air Control)? "Idle Air Control". Ha! Thinking and writing at the same time. Idle of course, was thinking about the intake though Link to comment Share on other sites More sharing options...
Ranger Posted February 19, 2010 Report Share Posted February 19, 2010 Mine has suddenly developed a taste for gasoline. It is running as smooth as silk, but fuel consumption has suddenly gone up a little above normal. Also, the engine fuel shutoff, when decelerating, very seldom works anymore. You don't really have any engine braking when decelerating from highway speeds. Up until a week and a half ago.. it was all ok. Check for a leaky FPR. Link to comment Share on other sites More sharing options...
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