unilateral_disgust Posted November 8, 2006 Share Posted November 8, 2006 what is the lowest possible safe idle speed for ls400/celsiors i know it should be about 650 but i recently changed my spark plugs / wires and while i had the throttle body off i though id clean it. now it runs at about 400 rpm it feels like i have an engine from a 69 camaro, though it doesnt seem to have trouble running at such a low rpm in canada winter can be bad for cars with low idle and i just dont want it to stall. tomorrow i was thinking of checking my throttle stop screw to see if it was accidentaly loosened and also my throttle position sensor but is there any thing else i should look for? any help appriciated thanks. Quote Link to comment Share on other sites More sharing options...
cardona6569 Posted November 8, 2006 Share Posted November 8, 2006 Change the fuel filter if you have not. Clean the MAF sensor, the one after the air filter. If the air filter has more than 30,000 miles change it also, if it does not and it is extremely dirty that you cannot see the sunlight it needs replacement. C. PR what is the lowest possible safe idle speed for ls400/celsiors i know it should be about 650 but i recently changed my spark plugs / wires and while i had the throttle body off i though id clean it. now it runs at about 400 rpm it feels like i have an engine from a 69 camaro, though it doesnt seem to have trouble running at such a low rpm in canada winter can be bad for cars with low idle and i just dont want it to stall. tomorrow i was thinking of checking my throttle stop screw to see if it was accidentaly loosened and also my throttle position sensor but is there any thing else i should look for? any help appriciated thanks. Quote Link to comment Share on other sites More sharing options...
Threadcutter Posted November 8, 2006 Share Posted November 8, 2006 i was thinking of checking my throttle stop screw to see if it was accidentally loosened and also my throttle position sensor but is there any thing else i should look for? any help appriciated thanks. disgust: TPS Adjust Quote Link to comment Share on other sites More sharing options...
LexusLooker Posted November 8, 2006 Share Posted November 8, 2006 If my engine is warmed up, the A/C is off and I'm in gear, my '98 idles at 400 RPM. If I have the A/C on, it's at 650. It doesn't seem to be a problem. Quote Link to comment Share on other sites More sharing options...
blake918 Posted November 9, 2006 Share Posted November 9, 2006 If my engine is warmed up, the A/C is off and I'm in gear, my '98 idles at 400 RPM. If I have the A/C on, it's at 650. It doesn't seem to be a problem. Same here. Although my car seems to be ok with it as well, it drives me crazy (especially if I'm tryung to park). In the manual, they don't tell you much more than the car should idle at 600-700rpms in neutral w/ no accessories. Mine does that just fine. Put it in drive, and it's a whole other story... Change the fuel filter if you have not. Clean the MAF sensor, the one after the air filter. If the air filter has more than 30,000 miles change it also, if it does not and it is extremely dirty that you cannot see the sunlight it needs replacement.C. PR I've cleaned my MAF, air filter is replaced regularly, retuned the TPS (which is a nightmare to do if you do it the Lexus way) still with no 600-700rpm idle while in gear. My car technically idles as the repair manual says it should, but 400rpms is not normal. Quote Link to comment Share on other sites More sharing options...
unilateral_disgust Posted November 10, 2006 Author Share Posted November 10, 2006 thanks for your replies i did change my airfilter when i did the tune up i dont think my problem lies with my tps or stop screw any more but i never checked my maf i think ill do that tomorrow Quote Link to comment Share on other sites More sharing options...
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