Big problem when Idling
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Driver
Joined: Apr 2006
Posts: 121
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From: Texas
Big problem when Idling
My trusty old 1994 Lexus Sc400 has developed a very strange problem.
When I brake and the car comes to a standstill the car idles at a very low rpm but when I let go of the brake pedal it idles normally again.
So it must be related to the brake somehow,
Can it be the power brake pump?
I,m thinking the pump must be about to stall but not yet but it became hard to turn and it,s slowing down the engine speed.
Can any of you come up with a better idea of what this might be?
I really depend on my car and normally I don,t get into this kind of trouble with this car.
But I,m afraid of driving it now.
When I brake and the car comes to a standstill the car idles at a very low rpm but when I let go of the brake pedal it idles normally again.
So it must be related to the brake somehow,
Can it be the power brake pump?
I,m thinking the pump must be about to stall but not yet but it became hard to turn and it,s slowing down the engine speed.
Can any of you come up with a better idea of what this might be?
I really depend on my car and normally I don,t get into this kind of trouble with this car.
But I,m afraid of driving it now.
Hear any weird hissing noises?
Are you sure it is only when you press the brake and not when the car is in drive vs park or neutral?
I could potentially see a vacuum booster causing an issue, though usually it would be a higher rpm rather than lower... The "pump" is not a pump at all, it is just run off of the vacuum of the engine - it doesn't turn at all...
How low of an RPM are we talking?
Are you sure it is only when you press the brake and not when the car is in drive vs park or neutral?
I could potentially see a vacuum booster causing an issue, though usually it would be a higher rpm rather than lower... The "pump" is not a pump at all, it is just run off of the vacuum of the engine - it doesn't turn at all...
How low of an RPM are we talking?
Thread Starter
Driver
Joined: Apr 2006
Posts: 121
Likes: 0
From: Texas
Oh sorry I didn't post for such a long time but the thing is I'm having such a string of bad luck here that everything is breaking down on me.
My router decided to call it quits right after I wrote this thread so I could'nt go online till today.
Meanwhile I sent the car in for repair at the dealer they said they replaced the MAF sensor.
Everything is normal now but I think it's weird that it could be the MAF because I didn't have a CEL and it only happened when I pressed the brake.
But the dealer said that there is a lotmore that is wrong with my car and I need to service it there so they can tell me what other stuff is wrong with it.
I hope there are no big issues
My router decided to call it quits right after I wrote this thread so I could'nt go online till today.
Meanwhile I sent the car in for repair at the dealer they said they replaced the MAF sensor.
Everything is normal now but I think it's weird that it could be the MAF because I didn't have a CEL and it only happened when I pressed the brake.
But the dealer said that there is a lotmore that is wrong with my car and I need to service it there so they can tell me what other stuff is wrong with it.
I hope there are no big issues
Oh sorry I didn't post for such a long time but the thing is I'm having such a string of bad luck here that everything is breaking down on me.
My router decided to call it quits right after I wrote this thread so I could'nt go online till today.
Meanwhile I sent the car in for repair at the dealer they said they replaced the MAF sensor.
Everything is normal now but I think it's weird that it could be the MAF because I didn't have a CEL and it only happened when I pressed the brake.
But the dealer said that there is a lotmore that is wrong with my car and I need to service it there so they can tell me what other stuff is wrong with it.
I hope there are no big issues
My router decided to call it quits right after I wrote this thread so I could'nt go online till today.
Meanwhile I sent the car in for repair at the dealer they said they replaced the MAF sensor.
Everything is normal now but I think it's weird that it could be the MAF because I didn't have a CEL and it only happened when I pressed the brake.
But the dealer said that there is a lotmore that is wrong with my car and I need to service it there so they can tell me what other stuff is wrong with it.
I hope there are no big issues
Thread Starter
Driver
Joined: Apr 2006
Posts: 121
Likes: 0
From: Texas
I need to take it there for an oil change and pay for inspection for them to tell me about the other stuff that,s wrong with it.
But I'm thinking I'm gonna do that the next time I change the oil instead of doing it myself I'll let them inspect the car and tell me what's wrong with it
But I'm thinking I'm gonna do that the next time I change the oil instead of doing it myself I'll let them inspect the car and tell me what's wrong with it
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Max Power
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Nov 11, 2010 10:21 AM
