Lexus SC430 :: Engine Bogs Down At A Higher Speed
Jan 9, 2016
When I am driving at a higher speed and I need to pass someone or accelerate, the engine bogs down. I push the peddle to the floor and nothing. This does not happen all the time but it happens. But when I accelerate from a light or lower speeds there does not seem to be an issue. I recently had the value gaskets replaced because of a small oil leak and it seems this problem began after then. I have taken it back to the shop but the problem does not duplicate itself when they test drive it.
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I have noticed that when pressing on the brakes at 50 MPH and higher my steering wheel starts vibrating and it feels like the car is being tugged a little to the left. This started a couple of weeks ago, what might be causing this?
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This morning I went to go to work, started to back out of the drive, and the transmission locked up. So I go to put it in first gear, let off the clutch, and the engine bogs down like its in 5th gear. I then decided I will just push it back in the drive, so I put it in neutral, let off the clutch, and its still in a gear while in neutral. Last night it drove fine before parking it, and then when waking up its broke. What could be wrong?
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I am in search of a SC430. I know that from 02-05 it has 5 speed trans. 06 and newer has 6 speed.
Is there a big different in the drive? I just want to justify the extra cost for the 06 and newer.
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I've been feeling more and more, a vibration in the RX400 AWD. Just to be certain, I had the tires rotated and balanced....still there. My conclusion is a wheel bearing.
What I notice, from 60 up to 80 MPH (speed limit in WY & MT), a slight vibration in the car. I can't pinpoint if it's front or rear, but there is certainly one occurring.
So, is there anything else that could contribute to this or is it usually a wheel bearing going bad? I just drove 1200 miles over the holiday and didn't notice much of a change. Still vibration. Not so strong that my wife has noticed, but enough that I'm feeling it.
I assume it's just a complete assembly and can be changed out relatively easily. I've done my 4wd suburban so I'm guessing similar in work.
How to test which assembly is going bad? Front/Back....Left/Right?
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The SC I recently bought is quite quiet except for a helicopter noise at speed.
This noise becomes obvious at around 70 kph (40 mph) but can be noticed at lower speed (volume much lower). I don't think turning the wheels or braking makes a difference.
Since it's speed-sensitive and there's no noise when the car isn't moving, I guess it's related to the wheels. I've just replaced the rear tyres last weeks; nothing changed. I've checked the tyre pressure today; may have got a little improvement (not sure) but the noise is still there.
Is this the wheel bearing noise? Or is this tyre noise? Could the differential make this kind of noise (the only other thing I can think of that's speed-correlated)?
Also, as an aside I pulled the fuse on the te/ti steering the other day because I'm too lazy to use techstream. I swear there's a noticeable improvement in the steering accuracy and feel. Really don't know why.
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2000 Crown Victoria, 207K miles, 111K on current engine
My car has been an absolute champ since I took ownership of her at 133K miles, and to this day runs trouble-free. However, it's just started making a noise that's got my scratching my head. I can only describe it as a "puff" sound. It's consistent with engine speed (higher RPM = faster puffs), and seems to get louder the more open the throttle is. If you let off the gas and coast, the noise goes away.
What's kinda confusing me is that the noise does not occur at all while the car is not in gear. If you park and rev the engine, the noise doesn't happen at all. All fluid levels and conditions are good, and there's been no loss of power or other issues from the engine or transmission.
My only guess is perhaps I have a teeny-tiny pinhole leak in my exhaust somewhere. The sound seems to be coming from somewhere very close to the engine, but since it doesn't happen when parked I can't pop the hood and look around for where exactly the sound might be coming from.
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I found recently that my 04' Prius' engine easily goes higher rev than before (based on engine sound pitch). It happens mainly when cold start, go up hill. After warmed up and on flat road, it goes back to normal. Overall, still in great condition at 211K. MPG stays at 46 on meter when temp is around 45F with 50% highway drive at 100 miles/day. I suspect the serpentine belt slippery or something. What do you think? I think the belt is original. I bought it used at 104K.
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In my current speedometer the speed needle doesn't work i did everything and changed all sensors and checked all related issues and all is fine turned out the issue was with the speed gauge it self. So i bought my self a used speedometer.
Now my question is, how to dismantle the speedometer cause I want to take out the speed gauge from my old one a replace it with the new one i know its much easy to change the whole thing but I don't want to play with the mileage I have on my car.
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Having a problem when going over speed bump or drain at the end of your driveway?My roof makes a popping noise?
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is locking in 4m but is too high, suppose to be ~2200rpm.When I checked with vagcom the speed shown on computer show a speed with 20km/h higher than the real speed (shown at speedometer)
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I have a 91 4Runner SR5 V6 3.0L that has been a great truck (like all of them?) until just recently.
Symptoms are bogging at roughly 25 mph or 2500 rpm in second to third gear. It will also sometimes not take off from a stop at a slight incline. By hammering the throttle down and forcing a downshift, the truck will rev up and then accelerate, but then again sometimes bog down until the same "forced shift" is done.
This seems prevalent when the engine is hot, however, that may be coincidental with the high temps here in So Texas lately. The truck does seem to run fine for a while after starting it. Mechanic hasn't isolated anything.
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Sometimes I will stop at a light and my idling rpm will go from 600 (usual rate she idles at) to about 950. While this may seem inconsequential in the grand scheme of things, it's noticeable enough that it seems like the car wants to go. It'll lead me to depress the brake more. You can also hear the higher pitch of the faster turning engine (it is a 50% increase in speed). This will happen at random times so I have not been able to pinpoint if it is caused by a particular driving style. ECM for this?
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I only use AC in the summer around here, not year 'round. When I turn it on, I notice that the engine revs higher when turning the compressor, which cycles on and off. It's only a few hundred RPM, but it's quite noticeable and will make the truck surge forward when sitting at a traffic light. The dealer says this is how the AC works on a GX, so I've gotten used to it.
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Engine idling on D and idling on N/P. Mine sometimes runs at 600, sometimes at 650. When I steer, rpm should go higher but it doesn't go.
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So I went on a little trip about 500 km away.. when i got there everything was normal.. next day while hanging with my buddies my Engine light, VSC and VSC OFF light came on.. I wasn't pushing the car or anything, driving normal and going around 120 to 135 kph on hwy there. Usually people would panic but in the past I have had cars that got these lights and usually its just a sensor.
I mean the car drives perfectly normal, i have driven it 900 km after the light, the temperature doesn't rise, there is no leaks anywhere, there is no smell, engine oil is all there, everything seems perfectly fine. I read a few threads referring to the oxygen sensor? I am thinking of getting that replaced.. how many are there that I would have to change? Also someone mentioned ABS sensor in another thread.. not sure what that has to do with the engine, i mean ABS has its own light right?
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Noticed a slight vibration from my engine at idle. Nothing too overbearing but just had a concern. How much should I expect if the engine mounts need replacement? Parts? Labor?
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My check engine light just turned on recently. Just hit 115K miles on my SC430 a few weeks ago. Is there a service that I'm missing? Running absolutely fine, oil change recently as well.
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I have a 2003 SC430 with 170,000 miles on the odo. When at idle, the car shakes a little. I notice it the most when at a red light. But if I put the car in N, the shaking goes away. It happens with the most severity when in D and with my foot on the brake. I'm assuming the shake is normal for a car of this age and mileage, but i'd like to eliminate it.
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I got 2002 SC430 with 59,000 Miles, all of the sudden my car doesn't have any acceleration at all. When I press gas paddle it doesn't do anything, but engine stay on. I couldn't get any error codes since I changed batteries to make sure if it wasn't the battery..
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My engine coolant is low, so I just picked some up from toyota to top it off. The bottle says to see the owner's manual for the proper ratio. I don't have mine handy. The best I could find was this PDF posted by Bob. But it doesn't have the ratio. What it should be?
[URL]....
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