Uneven idle after cleaning engine
 

I power washed my engine the other day. Now, after it warms up the rpms at idle go up and down. from say 1000 rpm to 2000 rpm and back and forth. Anyone know what would cause this?

IF ITS TURBO IT SHOULD BE 650rpM AND n/a IS 700 DOES IT GO AWAY AFTER AWHILE? AND DO YOU HAVE THE STOCK INTAKE? SOME OF YOUR WIRES MIGHT BE MESSED UP CHECK ALL VACUUM TUBES.

oops u could have moisture in some components my advise never use a pressure washer on engine you can get water in places it should not be if you need to clean engine do it by hand much safer and cheaper u might of knackered a sensor up

i washed mine and the same thing happened to me.

you most likely got water in places where it shouldnt be (ex. wires,connections/connectors, )

let the car idle it out, n after a while it should be fine.



never powerwash an engine. get a hose without a sprayer on and let the water flow around the engine after u spray engine degreaser on it. try to stay away from electrical stuff.

edit- i dont know.. if it was going from 1000 to 2000 rpm's,thats a big jump.
mine was little

yeah i was planning on power washing my engine tilll i found that water can ruin your computer componets and all the senstive sensors.

Usually it gets in the spark plug valley and qenerates a sporatic idle. I would drive it as long as possible to to get it to warm up and evaporate.

Or get a compressor and air gun and start blowing off components until it fixes it.

Usually you can pull a spark plug boot and blow air in that valley and a bunch of dirt/dust/small leaves and debris that got in there will come out watch your eyes wear safety glasses.

I would also blow on the connector for the TPS and the idlle speed control and the aid flow meter. Hell disconnect em and blow the water out of there. That should solve it. I would guess the TPS could effect it the most.

yep.. you got water in your electrical components... it'll dry out eventually and come right

if it a 7mge try taking off the distributor cap to check for moisture, if 7mgte do the same for the cam position sensor

pressure washers blues 2
 

i done the same thing. the motor looks great now ,but once warm, the idle goes up and down. i took it to the dealership. they told me my TPS was o.k. My MAP sensor was o.k. they said my idle speed control valve was not functioning properly and wanted to replace it for $478. i brought the car home and will check it out myself before looking for one.

before taking it there, i found that i flooded the area between the cam covers where the plugs are. fixed that. distributer was wet. fixed that. changed plugs , wires , distrib cap , rotor etc. drove it for days on end. finally gave up.

a haynes manually tells you how to test each sensor. you'll need a meter for that. mine's a Fluke brand meter. very time consuming.

hope this helps. no one ever answered me when i posted the same question. heck , i cant even find my posted thread. nice to see i'm not the only clean motor freak.

that would suck if you have to pay 500 cause you washed your engine bay.

ya those bitches at the dealership overcharge

take it somewhere elese for about half

That's why the owners are all millionaires !

And also one reason I didn't go back to work at any....here the shop rates are about $90/hr, and the "very top" techs get $20-25 of that.

exactly, grandma or mom doesnt know what to do with their car when it is making a funny noise so they take it to the dealership and get ripped off cuz they dont know any better.

water inside the spark plug valley, get it out and you should be fine

????
 

i thought forums were meant to find answers , not comments that dont help anything. how about someone that knows something besides how much life sucks.

valley
 

spark plug valley was dry a month ago.

look, im sorry nobody can find your anwser. my advice to you LIVE AND LEARN, and that was an Expensive mistake you made.

if you dont like the "comments that dont help anything" then get out B/C that is what forums are all about. if you cant find your anwser then too bad go to another, but dont complain about it.


this forum isnt just a place to "find Answers" , its about the all around gossip about the supra.

so after all that..did it fix itself or not?

not fixed yet
 

so far ive also replaced a hose going to the ICS valve that had a small crack. removed the ICS and took it apart and cleaned it. (no water there) now i'm looking for a new accordian tube going to the throttle body from the mass airflow sensor because it has a crack in it. it must be a sealed unit.

anyway... not fixed yet. anyone have any other ideas on what to check?

liar
 

well. i made a liar out of myself. i decided to go and change valve cover gaskets. while in there , i found more water (and oil). i changed the valley gasket and valve cover gaskets , after getting "all' the water this time.

it's so clean in there now you could eat lunch off it.

unfortunately i'm still waiting on my accordian hose that the dealer totally screwed up for me. so i cant start it yet. maybe in a couple days.

i'm finding out , supra parts arent easy to find.

fixed
 

well. after all the water was removed it still idled like $#1* . i bought a used intake off ebay which had a idle control speed valve on it. changed it out and i'm back to normal with a very very cleaned "new" looking motor.

there was never water in this sensor when i took it apart. the sensor was sticking in one position. why this happened when washed , i dont know.

thanks for the help and hope my experience helps someone out later in life.