da_fugative_7 Posted August 7, 2009 Share Posted August 7, 2009 Ok..I have a 91 LS400 with about 231K miles. As I pulled up at my house and turned off the motor, I heard a small rumble. I put my ear to the dash and thought 4 a sec that it was the fans from the engine. So I exited the car and then put my ear to the hood. I decided to pop the hood and to my surprise the engine was still running without the key in the ignition. I turned the key off and on several times and the engine still was running. So I got my wrench and disconnected the battery cable and the engine stopped. I have never had this problem b-4 so can you guys/gals give me an idea of what's wrong and what repairs are required if any and how much...? As always, your help is greatly appreciated.... Quote Link to comment Share on other sites More sharing options...
python Posted August 7, 2009 Share Posted August 7, 2009 ignition switch? Quote Link to comment Share on other sites More sharing options...
da_fugative_7 Posted August 7, 2009 Author Share Posted August 7, 2009 Ok..I have a 91 LS400 with about 231K miles. As I pulled up at my house and turned off the motor, I heard a small rumble. I put my ear to the dash and thought 4 a sec that it was the fans from the engine. So I exited the car and then put my ear to the hood. I decided to pop the hood and to my surprise the engine was still running without the key in the ignition. I turned the key off and on several times and the engine still was running. So I got my wrench and disconnected the battery cable and the engine stopped. I have never had this problem b-4 so can you guys/gals give me an idea of what's wrong and what repairs are required if any and how much...? As always, your help is greatly appreciated.... I could check that...but if not that, then what...? Let me know... Quote Link to comment Share on other sites More sharing options...
python Posted August 7, 2009 Share Posted August 7, 2009 for it to still be running that means u have power to the coils..i say ignition switch Quote Link to comment Share on other sites More sharing options...
Quack11 Posted August 8, 2009 Share Posted August 8, 2009 Ok..I have a 91 LS400 with about 231K miles. As I pulled up at my house and turned off the motor, I heard a small rumble. I put my ear to the dash and thought 4 a sec that it was the fans from the engine. So I exited the car and then put my ear to the hood. I decided to pop the hood and to my surprise the engine was still running without the key in the ignition. I turned the key off and on several times and the engine still was running. So I got my wrench and disconnected the battery cable and the engine stopped. I have never had this problem b-4 so can you guys/gals give me an idea of what's wrong and what repairs are required if any and how much...? As always, your help is greatly appreciated.... The ignition switch is the only thing that will allow the engine to continue running after turning off and removing the key. When the ignition switch is turned to the OFF position, it basically kills primary power to the coil and stalls the engine. Unless the coils are getting 12V power from somewhere else, you have a bad ignition switch. Also by disconnecting battery cable your vehicle should continue to run from power provided by your alternator and should not shut down. If you have a remote start system on your car this could also be the cause so do your research and let us know how this problem is solved. Quote Link to comment Share on other sites More sharing options...
python Posted August 8, 2009 Share Posted August 8, 2009 good point quack...if u have something else wired into ur ignition like a fan or stereo or something it might let power go through, if u have had no work done to ur car and it just started doing this then i would say its ur ignition switch Quote Link to comment Share on other sites More sharing options...
da_fugative_7 Posted August 10, 2009 Author Share Posted August 10, 2009 Ok...checked the ignition switch and it's fine....I did have a code 25 pop up but I don't think that has anything to do with the ignition. Any suggestions? Quote Link to comment Share on other sites More sharing options...
python Posted August 10, 2009 Share Posted August 10, 2009 how did u "check" the ignition switch? Quote Link to comment Share on other sites More sharing options...
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