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Lsquared88

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  • Lexus Model
    98 ES300

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  1. Well I bought some ultra black RTV and used it on the black coil and the IACV...rpm didn't jump anymore but high rpm was still there So I figure wat the heck, I'll buy a new IACV and install it...now everything is working fine :D I appreciate everyones help with my situation...thank you!!!
  2. I checked my hoses and they look to be ok I drove the car around the block and definitely heard some kind of hissing sound from the engine...rpm still won't go below 1700 come to think of it, when i was taking apart the black coil and IACV, there was some kind of sticky gasket between them and half stayed on the IACV and other half stayed on the black coil...can i replace that gasket? if so, where can i pick one up? it's weird no CEL either Your thoughts...thanks!!!
  3. Hello...I have a 98 ES 300 with 105,000 miles and recently my car has been having a problem. When I start my car, the engine will start up but the idle will get lower and lower until the engine dies. If I start the car and give it some gas it will be ok. I searched the forums and found out that I need to clean the IACV, which I did (thanks to detailed write ups :D) but now the problem is when I start my car, the idle is real high. It idles at 2500 rpm and slowly rises to about 3000 rpm in about a minute or so. After about a minute, the idle will reach 2000 rpm and jump to 2500 rpm back and forth. I have tried resetting the 15 EFI fuse, checking vacuum lines and hoses, unplugged the battery, and still no luck. I'm not sure what else to do. I don't think it's safe to drive the either. Any suggestions? TIA
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