2000 ls400 car coasts too slow under 30mph
03-01-18, 06:48 PM
#1
Driver School Candidate
Thread Starter
2000 ls400 car coasts too slow under 30mph
Hey y'all. I'm noticing that my ls400 is coasting strangely. It is a 2000 ls400 with 188k miles.
what I'm feeling is that under 30 mph when I let off the gas instead of coasting slowly to a stop, the car stops very quick, like the brakes are on slightly. Above 30mph it seems to coast normally, at least what you would intuitively think coasting to a stop in a big car with lots of momentum would be like.
I've checked the brakes to make sure they are aligned correctly, and though they will need to be changed soon, they are setup properly. Am I just being paranoid and not understanding how these cars drive? Or could something other than brakes be causing this to happen? I was fighting vacuum leaks earlier this month when I first got the car. So that could be another issue affecting how the car idles as it coasts.
what I'm feeling is that under 30 mph when I let off the gas instead of coasting slowly to a stop, the car stops very quick, like the brakes are on slightly. Above 30mph it seems to coast normally, at least what you would intuitively think coasting to a stop in a big car with lots of momentum would be like.
I've checked the brakes to make sure they are aligned correctly, and though they will need to be changed soon, they are setup properly. Am I just being paranoid and not understanding how these cars drive? Or could something other than brakes be causing this to happen? I was fighting vacuum leaks earlier this month when I first got the car. So that could be another issue affecting how the car idles as it coasts.
03-01-18, 07:26 PM
#2
Hey y'all. I'm noticing that my ls400 is coasting strangely. It is a 2000 ls400 with 188k miles.
what I'm feeling is that under 30 mph when I let off the gas instead of coasting slowly to a stop, the car stops very quick, like the brakes are on slightly. Above 30mph it seems to coast normally, at least what you would intuitively think coasting to a stop in a big car with lots of momentum would be like.
I've checked the brakes to make sure they are aligned correctly, and though they will need to be changed soon, they are setup properly. Am I just being paranoid and not understanding how these cars drive? Or could something other than brakes be causing this to happen? I was fighting vacuum leaks earlier this month when I first got the car. So that could be another issue affecting how the car idles as it coasts.
what I'm feeling is that under 30 mph when I let off the gas instead of coasting slowly to a stop, the car stops very quick, like the brakes are on slightly. Above 30mph it seems to coast normally, at least what you would intuitively think coasting to a stop in a big car with lots of momentum would be like.
I've checked the brakes to make sure they are aligned correctly, and though they will need to be changed soon, they are setup properly. Am I just being paranoid and not understanding how these cars drive? Or could something other than brakes be causing this to happen? I was fighting vacuum leaks earlier this month when I first got the car. So that could be another issue affecting how the car idles as it coasts.
A) Go to a parking lot. Drive to 10 mph and slip transmission into neutral.
Does the car seem to slow too quickly?
(emergency brake cables dragging in sheaths)
B) Engage reverse. At 5-10 mph in reverse, apply ebrake with foot while holding out ebrake release handle, then release and let car coast to a stop.
Now do A above. If less sticky, you have kicked the ebrake shoes which pull the cables temporarily more relaxed
C) Step on foot brakes firmly and hold. Now release and shift immediately into D. Does car creep forward normally or does it hold?
(caliper frozen or brake hose collapsed)
That is as far as I can guess at this time.
Colin
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Boredsoim1 (03-01-18)
03-01-18, 11:44 PM
#3
Driver School Candidate
Thread Starter
Experiment:
A) Go to a parking lot. Drive to 10 mph and slip transmission into neutral.
Does the car seem to slow too quickly?
(emergency brake cables dragging in sheaths)
B) Engage reverse. At 5-10 mph in reverse, apply ebrake with foot while holding out ebrake release handle, then release and let car coast to a stop.
Now do A above. If less sticky, you have kicked the ebrake shoes which pull the cables temporarily more relaxed
C) Step on foot brakes firmly and hold. Now release and shift immediately into D. Does car creep forward normally or does it hold?
(caliper frozen or brake hose collapsed)
That is as far as I can guess at this time.
Colin
A) Go to a parking lot. Drive to 10 mph and slip transmission into neutral.
Does the car seem to slow too quickly?
(emergency brake cables dragging in sheaths)
B) Engage reverse. At 5-10 mph in reverse, apply ebrake with foot while holding out ebrake release handle, then release and let car coast to a stop.
Now do A above. If less sticky, you have kicked the ebrake shoes which pull the cables temporarily more relaxed
C) Step on foot brakes firmly and hold. Now release and shift immediately into D. Does car creep forward normally or does it hold?
(caliper frozen or brake hose collapsed)
That is as far as I can guess at this time.
Colin
03-01-18, 11:47 PM
#4
Driver School Candidate
Thread Starter
I agree. I really hope it is just how the transmission works normally and I'm just not used to the car. I'm probably just being paranoid cause I really can't afford any repairs for a while as my budget went to getting the car and the timing belt done. This is all probably me just stress sweating for no good reason.
03-02-18, 12:01 PM
#5
The car should glide then gradually slow down when you let off your foot from the gas pedal. Sounds like your tranny is downshifting prematurely. Check the fluid level in park after car warmed up & top it off if it's too low. Since you've just got the car, you probably have no prior maintenance history of it, I suggest you do a tranny drain (not flush) & refill w/ the Toyota Transmission Fluid, Type IV. It only takes ~ 2 qts. Try this first as it's inexpensive.
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