LS 430: Hitting the gas pedal does not accelerate the car ( Time Delay )
#1
Lexus Test Driver
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LS 430: Hitting the gas pedal does not accelerate the car ( Time Delay )
Hello guys,
A friend of mine owns an LS 430.
Whenever he hits the gas pedal the car does not accelerate immedietly
its takes more than 5 seconds in some cases.
He said ( when you hit the pedal you feel theres no fuel being circulated to the engine nothing then all of a sudden the car accelerates )
Things that he has done so far but with no luck:
Replaced Air & Fuel Filter
Cleaning the Injectors
Spark Plugs
Exhausts
Replaced Coils
Anyone faced the same issue before ?
All Suggestions/Solutions are welcomed
Thanx in advance.
A friend of mine owns an LS 430.
Whenever he hits the gas pedal the car does not accelerate immedietly
its takes more than 5 seconds in some cases.
He said ( when you hit the pedal you feel theres no fuel being circulated to the engine nothing then all of a sudden the car accelerates )
Things that he has done so far but with no luck:
Replaced Air & Fuel Filter
Cleaning the Injectors
Spark Plugs
Exhausts
Replaced Coils
Anyone faced the same issue before ?
All Suggestions/Solutions are welcomed
Thanx in advance.
Last edited by uae; 08-25-10 at 08:38 PM.
#3
Did you clean the throttle body flap? They get gummed up with sticky carbon. After enough buildup, the flap won't open and the engine will throw a check engine code. Dealer will diagnose it as a bad throttle body (like $1K to replace) when all you need is a stainless brush and can of carb cleaner. My other guess would be a dirty mass airflow sensor between the air filter and throttle body.
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Did you clean the throttle body flap? They get gummed up with sticky carbon. After enough buildup, the flap won't open and the engine will throw a check engine code. Dealer will diagnose it as a bad throttle body (like $1K to replace) when all you need is a stainless brush and can of carb cleaner. My other guess would be a dirty mass airflow sensor between the air filter and throttle body.
Isnt the throttle body flap same as cleaning the injectors ?
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yeah that too ^ ^ ^
well you all know what i'm gonna say. the cheapest and 'sometimes' easiest fix which is what i do first and then if it doesn't help i look at all those other things, is to just reset it. unhook the negative battery terminal for 30 minutes than connect it back up. if it helps it was pretty much free, if not, well it was free and was worth a shot. makes my car faster for a couple weeks anyways. i notice when i drive like an old guy for a couple weeks straight that my car tends to accelerate like an old guy after a while too.
well you all know what i'm gonna say. the cheapest and 'sometimes' easiest fix which is what i do first and then if it doesn't help i look at all those other things, is to just reset it. unhook the negative battery terminal for 30 minutes than connect it back up. if it helps it was pretty much free, if not, well it was free and was worth a shot. makes my car faster for a couple weeks anyways. i notice when i drive like an old guy for a couple weeks straight that my car tends to accelerate like an old guy after a while too.
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are you pulling out of somewhere when you notice this? Look at the display and see if your traction control light comes on when you see this lag. I notice this when I am pulling out of a street or a parking lot. It seems that the back end can lose traction and then (if you are accelerating quickly) you are pretty much screwed until the traction turns back off.... This causes exactly what you are describing.
#14
Did you clean the throttle body flap? They get gummed up with sticky carbon. After enough buildup, the flap won't open and the engine will throw a check engine code. Dealer will diagnose it as a bad throttle body (like $1K to replace) when all you need is a stainless brush and can of carb cleaner. My other guess would be a dirty mass airflow sensor between the air filter and throttle body.
#15
I'm with Jim on this one, I'm picturing a sticky throttle body,that has sticky gunk along the edges, pretty much gluing the edges to the body, when the motor finally breaks it loose, the car accelerates. however, the more i think about it, if that were the case, wouldn't the car have a hard time slowing down too? let us know! keep us posted
Disconnect the big pipe that goes from the airbox to the TB. You can now see the TB flap. Don't spray carb cleaner straight into the flap. With the engine off, you can gently push in the flap (it's hinged), spray some carb cleaner on a stainless toothbrush, and gently scrub the inside of the TB where it touches the flap. Be careful as the TB flap sensor is at 12 o'clock (at least on my LX), so I don't scrub that part. I then spray carb cleaner on a clean rag and wipe up the residue. Reintall the plumbing to the TB and you're good to go.
According to a Toyota mechanic who used to maintain my truck (started his own shop), you should do this every 30K miles. I did it on my wife's LX at 60K mi (first time) and there was some buildup. I repeated it at 90K mi and there was only a tiny bit of buildup. My old toyota truck had 120K mi before it was done.