texasbigdog Posted December 17, 2007 Share Posted December 17, 2007 Help - I did the Seafoam treatment on my 1997 LS400 thru the brake booster as described in this forum. Car was running great before the treatment, just had it serviced @ 120K miles, last week. I put about 8oz of Seafoam thru the brake booster and let it set with the engine off for about 15 minutes. When I started the car it was dense white smoke everywhere for about 5-minuters. Then I took it out on the highway to blow out ther rest of seafoam. CEL and Track-off warning lights came on a I left the driveway and won't go off. Any thoughts on what I may have done to it? I ran noticeably better and smoother after the Seafoam. Thanks TexasBigDog 1997 LS400 - 120K miles - like new! Quote Link to comment Share on other sites More sharing options...
TA in KC Posted December 17, 2007 Share Posted December 17, 2007 Help - I did the Seafoam treatment on my 1997 LS400 thru the brake booster as described in this forum. Car was running great before the treatment, just had it serviced @ 120K miles, last week. I put about 8oz of Seafoam thru the brake booster and let it set with the engine off for about 15 minutes. When I started the car it was dense white smoke everywhere for about 5-minuters. Then I took it out on the highway to blow out ther rest of seafoam. CEL and Track-off warning lights came on a I left the driveway and won't go off. Any thoughts on what I may have done to it? I ran noticeably better and smoother after the Seafoam. Thanks TexasBigDog 1997 LS400 - 120K miles - like new! Might have killed the oxygen sensors. Would probably be a good idea to take it to Auto Zone and have them pull the computer codes. Quote Link to comment Share on other sites More sharing options...
Bali26 Posted December 17, 2007 Share Posted December 17, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Quote Link to comment Share on other sites More sharing options...
texasbigdog Posted December 17, 2007 Author Share Posted December 17, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? Quote Link to comment Share on other sites More sharing options...
Bali26 Posted December 17, 2007 Share Posted December 17, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? In my 91 its under the hood near battery. Its for the computer. You can't pull codes on odbII yourself. But im pretty sure they will go away with ecu reset. Quote Link to comment Share on other sites More sharing options...
dcfish Posted December 17, 2007 Share Posted December 17, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? In my 91 its under the hood near battery. Its for the computer. You can't pull codes on odbII yourself. But im pretty sure they will go away with ecu reset. Disconnect the neg. battery terminal for 10 minutes and reconnect. Quote Link to comment Share on other sites More sharing options...
sonyman Posted December 18, 2007 Share Posted December 18, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? He meant the EFI fuse. However, as dcfish suggested, pulling the battery terminal works just fine too. Quote Link to comment Share on other sites More sharing options...
texasbigdog Posted December 18, 2007 Author Share Posted December 18, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? He meant the EFI fuse. However, as dcfish suggested, pulling the battery terminal works just fine too. Quote Link to comment Share on other sites More sharing options...
texasbigdog Posted December 18, 2007 Author Share Posted December 18, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? He meant the EFI fuse. However, as dcfish suggested, pulling the battery terminal works just fine too. Those suggestions did the trick! Thanks everyone. Before Seafoam car was getting right at 25mpg at hiway speed (70-75 mph). First tank after seafoam it got 22.6mpg ( with CEL on). First tank after ECT reset it got 26.3mpg...All of this on one long highway trip. Don't know what caused the fluctuations, seafoam, brand of gas, or CEL.. Anyway! Thanks Quote Link to comment Share on other sites More sharing options...
dcfish Posted December 18, 2007 Share Posted December 18, 2007 Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? He meant the EFI fuse. However, as dcfish suggested, pulling the battery terminal works just fine too. Those suggestions did the trick! Thanks everyone. Before Seafoam car was getting right at 25mpg at hiway speed (70-75 mph). First tank after seafoam it got 22.6mpg ( with CEL on). First tank after ECT reset it got 26.3mpg...All of this on one long highway trip. Don't know what caused the fluctuations, seafoam, brand of gas, or CEL.. Anyway! Thanks We try, You Do I am happy this issue is resolved. Quote Link to comment Share on other sites More sharing options...
cardona6569 Posted January 13, 2008 Share Posted January 13, 2008 Hello: Check your car battery, I believe the Seafom had nothing to do with those lights coming on I feel your battery is on its way out. Have it checked, and be ready for it to be replaced soon, if it has water caps have them check maybe is low on water for now. But is going downhill and that is the way it is reflected on the Lex. Clean your terminals while you at it. CPR Remove ECT fuse for a few minutes to reset the system. If it comes on again then you may have messed up your O2 sensors or a spark plug maybe. You can also pull the codes at that time. Pardon my ignorance....what is the ECT fuse...I do not see it listed by that name in my owners manual. Is that the OBDII fuse for diagnostics...Is it in the box under the hood or on drives side compartment. What does ECT stand for? Thanks The car is running great, will it hurt it to drive it very far? He meant the EFI fuse. However, as dcfish suggested, pulling the battery terminal works just fine too. Those suggestions did the trick! Thanks everyone. Before Seafoam car was getting right at 25mpg at hiway speed (70-75 mph). First tank after seafoam it got 22.6mpg ( with CEL on). First tank after ECT reset it got 26.3mpg...All of this on one long highway trip. Don't know what caused the fluctuations, seafoam, brand of gas, or CEL.. Anyway! Thanks Quote Link to comment Share on other sites More sharing options...
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