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Old 04-11-2010, 02:13 PM   #1
DVad3r
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Question Check engine light after cleaning throttle body?

Hey guys,

I did a tune up on my car. I changed the spark plugs, replaced the air filter, cleaned the MAF sensor, and cleaned the throttle body.

Everything went fine until towards the end of the throttle body cleaning when the check engine light came on. The weird thing about cleaning the throttle body was that the engine would shut off when you unplugged the rubber intake tubes to get to it. We sprayed the cleaner in, reconnected the tube, turned the engine on, reved it a bit, then shut it off and repeat. The engine shut off a few times though when lifting the tubes. Also, we managed to lift the tube just a little while the engine ran to get the nozzle in and spray the cleaner. The engine would idle roughly and then idle strong, my dad said that's normal as it was burning the cleaner.

Anyways, close to the end of using 2/3rd of the bottle, the check engine light came on. We finished cleaning, reconnected everything the way it was, and the light was still on.

We disconnected the battery and reset the computer, and the light went away. Hopefully it doesn't come back.

My question is, is there anything that we could of messed up while cleaning the throttle bodies? If the engine chugged and shut off would that be the reason the light came on and stayed on even after everything was reconnected?

I just want to make sure we didn't F anything up...

Thanks,

Car is a 2001 Lexus ES 300
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Old 04-11-2010, 02:42 PM   #2
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It was just leaning out through a vacuum leak you were creating. Should be fine.
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Old 04-11-2010, 03:07 PM   #3
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^ yep
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Old 04-11-2010, 03:33 PM   #4
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The CEL is probably just a lean condition indicator. It should clear itself after you put some time on the engine.

Edit: if you're worried, go to advance or autozone and have them pull the code. If it's anything relating to a lean mixture, you can safely ignore it until it clears itself.
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Old 04-11-2010, 03:48 PM   #5
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Thanks guys, that's probably it. I cleared the light by resetting the battery/computer, hopefully it doesn't come back.
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Old 08-16-2015, 06:00 PM   #6
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Guys (COROLLA AE110 OF YEAR 2000)
I need help .. my car has been shutting on slowing down and sometimes having trouble starting in the morning. I have changed so many things ... i just wanna die ... Throttle body (second hand), distributor, fuel filter , New thermostat, second hand oxygen sensor, new ignition wires ( those that run from distributor to plugs), coolant sensor(New), New sensor that opens fun, new plugs, New ETF (FROM TOYOTA). HOW MUCH MORE CAN A MAN LOVE A CAR?
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Old 08-16-2015, 06:16 PM   #7
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Evidently not enough to take it to a qualified mechanic
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Old 08-16-2015, 06:19 PM   #8
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My mechanic s skills are wanting ...that's why i have come to the forum... here issues are hands on... you guys may just be the best mechanics consortium in the world. what i need is similar experience
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Old 08-16-2015, 09:52 PM   #9
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Quote:
Originally Posted by moskarimi View Post
My mechanic s skills are wanting ...that's why i have come to the forum... here issues are hands on... you guys may just be the best mechanics consortium in the world. what i need is similar experience
<--another way of saying your cheap??
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Old 08-16-2015, 09:58 PM   #10
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Quote:
Originally Posted by moskarimi View Post
Guys (COROLLA AE110 OF YEAR 2000)
I need help .. my car has been shutting on slowing down and sometimes having trouble starting in the morning. I have changed so many things ... i just wanna die ... Throttle body (second hand), distributor, fuel filter , New thermostat, second hand oxygen sensor, new ignition wires ( those that run from distributor to plugs), coolant sensor(New), New sensor that opens fun, new plugs, New ETF (FROM TOYOTA). HOW MUCH MORE CAN A MAN LOVE A CAR?
I have no idea whats wrong with your car, but I'd really like to know more about the sensor that opens fun. I might have one installed on my truck.

Check the idle air control valve if it has one. Those can cause random shutdowns when they go bad.
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Old 08-16-2015, 10:03 PM   #11
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Quote:
Originally Posted by JEDIYoda View Post
<--another way of saying your cheap??
Huh? That's what this forum is for.
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Old 08-17-2015, 03:05 PM   #12
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Guys honestly am caught in between a rock and a hard place. I could buy a second hand engine but hey... any engine in the market must be 15 years old and over as the last toyota AE 110 was made in year 2000. there are very slim guarantees hence my foolish purchasing spree hoping that issue will clear. On saturday night i took it upon myself to dismantle manifold and throttle body... i cleaned throttle thoroughly using DW40 ... i used petrol for the manifold and cleaned the black soot. come sunday and monday the car has not gone off as yet, however i feel like idling is too high so i rolled down the small accelerator screw and pushed backwards the Distributor, now am just in prayers hoping everything stays as is.
ooohhh did i mention... after cleaning the throttle body my Engline light went on permanently... even after i tried to reset one battery terminal ... nothing happens.
you must be asking WHY CAN'T HE SELL OFF AND BUY ANOTHER CAR?
I have An NZE and Already importing AXIO but Iam passionately in love with corolla110 ... its just my offroad car, its my pickup truck and my companion to work. its convenient and any mechanic can repair it in this part of the world ... offcourse with exception of this recurrent problem.
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Old 08-17-2015, 04:13 PM   #13
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Car isn't running right. I'll just play with the idle and randomly adjust the timing and hope for the best!
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Old 08-17-2015, 07:33 PM   #14
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Quote:
Originally Posted by moskarimi View Post
Guys honestly am caught in between a rock and a hard place. I could buy a second hand engine but hey... any engine in the market must be 15 years old and over as the last toyota AE 110 was made in year 2000. there are very slim guarantees hence my foolish purchasing spree hoping that issue will clear. On saturday night i took it upon myself to dismantle manifold and throttle body... i cleaned throttle thoroughly using DW40 ... i used petrol for the manifold and cleaned the black soot. come sunday and monday the car has not gone off as yet, however i feel like idling is too high so i rolled down the small accelerator screw and pushed backwards the Distributor, now am just in prayers hoping everything stays as is.
ooohhh did i mention... after cleaning the throttle body my Engline light went on permanently... even after i tried to reset one battery terminal ... nothing happens.
you must be asking WHY CAN'T HE SELL OFF AND BUY ANOTHER CAR?
I have An NZE and Already importing AXIO but Iam passionately in love with corolla110 ... its just my offroad car, its my pickup truck and my companion to work. its convenient and any mechanic can repair it in this part of the world ... offcourse with exception of this recurrent problem.
Why would you just replace an engine?, sorry to insult you but it sounds like you have very little knowledge of anything mechanical. Did you ever think to check the fuel pump to see if it's giving the rated pressure to the injectors?. First thing you need to do is buy a $12 Hayne's or Chilton's manual to learn how to properly work on your vehicle, "DW40" is "WD-40" I'm assuming and it's not the proper way to clean out a throttle-body, they make cleaners just for that purpose, WD-40 is a lubricant used to loosen rusted bolts, you may have damaged a sensor using it. I would recommend you have a pro diagnose you car rather then just randomly adjusting everything and hope it runs.
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Old 08-17-2015, 10:40 PM   #15
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Don't Clean V6 Tacoma throttle bodies from the 1st gen tacoma. If you do, you'll get a check engine light that you won't be able to get rid of easily.
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