ScDoinIt

iTrader: (2)

i was driving yesterday and i made a turn going pretty slow and my car turned off. then today it happen again in the same situation going slow and making a turn. i was wondering if anyone else here has had this problem. so far only happened twice very randomly. but curious what it may be. maybe someone else here has experienced the same problem and maybe has had it fixed and know what it is. hopefully my car does not continue to do this. any input , thanks.


yesterday it happend again this time i was not turning i was coming to a complete stop at a light nd it turned off again. this time when starting it it didnt stay on. i had to start it rev to high rpms then throw it in drive just to get in a parking lot like 15 feet away before it turned off again when i went into parking lot. shut it off 5 minutes then started it and let it sit then i drove home 4 miles and it didnt have a problem. i had this same exact problem 4 months ago and the mechanic i had to take it back to him 3 times to fix it. he said each time the reader said it was bad ecu. so he replaced ecu each time and the 3 time he also replaced an air flow sensor or something. the car would last a week before i had to take it back to him each time except the last time it last many months 4 til now.

OG Dada

iTrader: (10)

This might be applicable to your car;
https://www.clublexus.com/forums/per...rol-valve.html

Might as well do these since they're pretty much "free" fixes;
https://www.clublexus.com/forums/sc-...on-issues.html

Luxor

iTrader: (15)

Does your idle go down when you turn the steering wheel at a stop?

broda805

iTrader: (6)

might be the PS idle upper valve perhaps? it suppose to let in a small amount of metered air in when the PS pump is under load to keep the engine idle steady.

Ali SC3

iTrader: (10)

either that or your engine is already idling low. what rpm does it idle at when warm?

ScDoinIt

iTrader: (2)

i do not think so but when i leave today i am going to check if it does or doesnt.
UPDATE: WHEN AT A STOP AND I TURN THE WHEEL IS JUST SLIGHTY LIKE BARLEY BARLEY GOES DOWN A LITTLE LIKE I CANT REALLY TELL UNTIL I LET THE STEERING WHEEL GO BACK TO NORMAL IS MOVES JUST SLIGHTY BACK UP.

hmm i would have no idea personally. thanks for mentioning it so other people can reflect their thoughts on whether that is the problem.
i not sure today when leave i going to take notice and write it down.
UPDATE: I CHECKED THE IDLE WHEN WARMED UP AND THE IDLE SITS AT THE SECOND LINE. LIKE THEIR THE 0 AND BIG LINE AT 0RPM THEN THEIR ARE THE SMALLER LINES ABOVE IT BETWEEN THE 0 AND 1RPMS. AND IT SITS ON THE SECOND LITTLE LINE ABOVE THE 0. IS THIS NORMAL IDLE????


everyone thank you so much for helping because i had this same problem 4 months back and the mechanic kept messing up when fixing it it had same problem i took it back 3 times each time car only lasted about a week before i had to take it back. after one week would have same problem and he kept saying the computer was reading bad ecu. the car got to a point when i would start it then it would shut back off so i would have to rev to high rpms then throw it in drive and take off but that would only go enough distance to pull to side of road or into a parking lot then shut off. the other day it did it again and i had to rev and do that i went into parking lot shut it off 5 minutes then started it and let it sit then i drove home 4 miles and it didnt have a problem. but oh i need to mention this time i wasnt even turning i was driving and when i came to a stop at the stop light is when it went out and turned off. really sucky.

ScDoinIt

iTrader: (2)

i really think this might be it. because he talks about how it will be pointing the finger at a bad ecu but really the ecu is not the culprit. hmm maybe i should just have someone run thru all these steps and i think it will be fixed.

he also talks about the whole idle thing so i going to look out for that today to see how the idle is acting.

what does anyone else here think i think the situation with his car and mine sound familiar.

thanks philip these are gr8 links. thanks for helping on the other subject too man really appreciate it!!!

TODAY WHEN DRIVING THE CAR FELT SLUGGISH AND THE STEERING WHEEL FELT KINDA WEIRD AT TIMES OR MAYBE I JUST TRIPPEN BECAUSE I THINKING THE CAR GOING TO SHUT OFF THE ENTIRE TIME BUT I REALLY THINK IT FELT SLUGGISH AND STEERING WHEEL WAS FEELING WEIRD.

Ali SC3

iTrader: (10)

your idle should not be that low, its about half of what it should be, which makes me think you have an iacv issue, or more likely one of the very common 1uz ignition issues which are usually a failed coilpack or ignitor or worn rotor that causes 1-4 of your cylinders to not fire correctly. The 1uz will still run but will idle very low if its an ignition related issue.
If its the IACV it would have similar symptoms but its cause you are choking the motor of air to keep a proper idle.

If you push the throttle down 50-100% and it still feels really sluggish (like a 4 cylinder instead of an 8), its not an iacv issue cause there is enough air now, so check the ignition. if it feels normal when giving it lots of throttle then check the iacv and tps.

is your check engine light on?

2jznosht

had your alternator tested?

ScDoinIt

iTrader: (2)

No my check engine light is not on. Also when i push the throttle down 50 to 100% it is normal theirs no sluggish feeling. atleast right now when i left i checked to make sure and everytime i pushed the throttle all the way it re acts like it should like race mode. and half way yeah its moving like it should( but yesterday it was not acting like this it was very when throttle down maybe because very hot day and ac on idk). excuse my lack of knowledge on this please but to get the iacv and tps checked out should i just have my mechanic follow all those steps in the two links philip posted ? what do u suggest i do and what should i show my mechanic because i do not know how to check any of this myself and rather have someone else do this. so what do u suggest i do?? thanks so much.


well both the left and right sides are warm. so i think the alternator is working.

ScDoinIt

iTrader: (2)

Also would i have to replace the iacv and tps completely like get those brand new? or would their be another way of just cleaning it or something ( i think that post the guy said he just cleaned it or something) ? today it did not turn off. atleast got a day break but not trying to drive it that much because of situation.

Ali SC3

iTrader: (10)

were the rpm's higher today? is that why it didnt turn off or was it still low. sometimes the idle valve just needs a cleaning, sometimes they are just shot. buying new is really expensive, i would find a used replacement that works.

ScDoinIt

iTrader: (2)

No they were not, they were higher when i put the ac on though. and actually UPDATE I DROVE LAST NIGHT TO GRAB A QUICK BITE TO EAT AND OF COURSE WHAT HAPPENS ON THE WAY HOME IT TURNED OFF WHEN ON A TURN I HAD TO SLOW DOWN ALOT AND ON THE TURN IT SHUT OFF ONCE MORE! IT WOULDN'T STAY ON WHEN I TRIED STARTING IT. SO I PUT IT IN NEUTRAL AND STARTED IT AND REVVED THE RPMS THEN THROW IT IN GEAR AND TOOK OFF AND MADE IT HOME BECAUSE THEY WERE NO STOPS IN BETWEEN BUT RIGHT WHEN I HAD TO SLOW DOWN ALMOST COMPLETELY ON THE TURN INTO MY ALLEY BEHIND MY HOME WHEN I WAS GIVING IT NO GAS AND RPS WERE LOW IT TURNED OFF AGAIN. SO I JUST REPEATED THE REVVING OF THE RPMS AND THROWING INTO DRIVE.

so try cleaning it or just replacing it will fix this problem? do you know wheres a good place to look for a good used replacement?

Lexus082

My iacv went bad and the first couple times I would come off the highway off the exit ramp to a stop light and would start braking and the the engine would stall out. I believe after you turn off the car you should hear a click from the iacv if my memory is correct. My iacv was stuck closed.

ScDoinIt

iTrader: (2)

Exactly what is been happening to me!! but i been trying to stay off high way just in case because i do not like driving my car to far when it has current problems because worried its going to get me stranded somewhere and waste so much time and be a hassle. But yeah whenever i going like 40-60 on the street for a bit and then i start braking for a light or for a turn right when i am almost stopped and not pushing the gas pedal it will stall out and shut off. i do not remember at those times if i heard that click or not when i shut it off because i was to busy wondering what the hell!!! and then trying to start it up and get the hell outta their. i wasnt really paying attention for other things just on getting it started again and getting off the road. but yeah one time i had to get it towed and when the triple A came to tow it the guy told me try n start it and it wouldn't start and then he said okay pop open the hood and then he put his hands on the iacv and pushed it open and held it and said try n start it then i tried and it started. he told me that it was stuck closed too!!! really been a pain in the u know what because i took it to a mechanic who is a retard and replaced the wrong things and i had to tow it back to him 3 times in 3 weeks and only somehow finally temporary fixed the problem finally but was temporary so now here i am again 3 months later looking like an *** hole on the side of the road not wanting to drive my car because of this crap. but anyway i just ordered the iacv from this place i bought it used, it better work and be in good condition like they said and not waste my time and $ or i going to be on some serious revenge!! at least the last few times it shut off i been able to start it have it in neutral and immediately rev to higher rpms then just throw it in drive and floor it and make it home or to a parking lot. but i pretty fed up with it i just hope when that part comes in and i have it installed i just hope it fixes the problem and that replacement part is in good working condition. should get it on monday, just ordered it today.