john3998

hi ladies and gentlemen I am new to the sight an new to Lexus I always own Toyotas my first Lexus 93 sc400 I love the car it has 119000 miles did a tune up when I by it, It was hesitating like crazy I do a oil change spark plugs and wires distributer caps and rotors coolant flush and thermostat brakes and rotors all around belts timing belt was don recently also I did a alternator it was blown dripping from power steering pump I repair the pump.

now I am having a hesitation again a mild one but I don't like at idle it idle hard intermediately thought it was the gas because I was using 87 instead of 91 or 93. change it and it still happen driving last night I playing my music then I put the turn signal on it start hesitate or miss again turn the music down and it stop I am wondering if the coil packs need to be change because it seem as if power is sucking from something.

need help what can I do can anyone help me please

durps

iTrader: (8)

Here ya go. Check coils and try 12v ecu mod.
And please use 91 dude, its only 4 more bucks per fill up. Only 2 more bucks if you do a a quick $25 gas stop. A lot of guys on here have even said the 87 wastes a lot faster too so youre spending less...to get less lol. Idk though have never used regular.
Good luck!
https://www.clublexus.com/forums/sho...d.php?t=551125

SC400slide

iTrader: (11)

There have been so many issues and threads like this one recently and most of them ended up being the coils. That's where I would start. Unplug each coil one at a time and attempt to start the car. If the car doesn't start with one unplugged it means that coil is good.

Dream36

yeah those coils are a pain. Even if the unplug a coil option doesn't show you a result (like mine didn't) try replacing them. For some reason our coils go bad if shaken bad or any kind of short in the system. I put 30k on my car since December and have replaced three coils (yes I know there is only 2 on the car). Generally the driver side one goes first as it is lower and closer to water/fluids.

john3998

Thank guys I will check it tomorrow. Whats the best coil brand to by?

Dream36

OEM coils work best. I got one from pepboys and two from autozone, the original autozone one failed after a week.

john3998

thanks!! so its best to go to the dealer then

SC400slide

iTrader: (11)

If you want to pay top dollar for OEM coils, the dealer is your choice. I'd look around ebay or amazon first.

john3998

Okay thanks I got a pair from a 99 sc400 just waiting to see what happen I just install them will find out if that's the problem soon. Thanks for your help guys