Toyota - Corolla :: RPMs Increases When Coasting
Jul 18, 2012
My 2009 , 1.8 Corolla gets terrible gas mileage. 23 city (lowest was 12), best ever was 30 highway. I have approx 14K on the odo because the MPG makes me want to leave at home.
The MPG has been verified in writing by 2 different dealers, so I do not consider myself the problem.I drive conservatively and calculate MPG based on actual miles / gallons.Toyota Corp did not bother to fix this issue.It has been serviced regularly and had whatever fixes Toyota offered.
What I think is causing my terrible mileage is some glitch in an engine sensor that causes it to rev from 900 to 1100 RPM when I take my foot off the accelerator and attempt to coast. The revs go down when I press the brake. This happens constantly, especially at around 25 MPH. If I do not brake, the car will pull for a while without slowing down like normal cars.
I showed my Toyota dealers but they all said nothing is wrong. My Corolla even went up a slight hill without my foot near the accelerator. One tech told me the Corolla is burning off extra fuel, but my car will pull itself for over 1/2 mile, too much time for "burning"
Something IS wrong. I have driven dozens of vehicles and never had one jump like this. Where to start diagnosing?
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I am a first time Toyota car owner. I bought a 2010 Toyota Corolla LE this past Saturday. It has only 42,000 miles on it, and I got a pretty decent deal on it! I'm still getting used to how the car drives, but it seems to be running great. The only thing I notice sometimes is that I am coasting downhill (not using the brakes) I notice a bit of a vibration sound coming from what sounds like the back windshield. If it keeps occurring, I might take it to the dealer for them to check it out. With my luck, the issue might not even happen though with them there.
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Baffled that my well-maintained 05 Corolla couldn't smog today. Smog checker said rpms were too high and it got kicked off the machine six times; said he had replaced his cable today. Manual transmission, 96,000 miles and had oil change last week; 93,000 major service included flush of something.
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RPMs fluctuate from very high to very low without me doing anything. It doesn't do it all the time, so far its happened 4-5 times in the past 3 days. I first noticed it when driving, I took my foot off the gas to break and it started doing it and once I hit the gas it stopped. It seems to be getting worse because today I put it in the park and when it should have jumped into idle it started and even when I hit the gas it didn't stop. Like I said the RPMs fluctuate from very high to very low in a few seconds regular intervals.
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2 days ago in order to get home I had to attempt to drive through a rather large puddle. Never stalled or anything but the front was fairly submerged, not enough to stall but enough. Now I am getting a god awful noise from the front, and I think its the ac. I noticed the noise increases with rpm's. Can I just remove the belt so that I can still drive the car without the AC?
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Car is a 2000 Corolla CE.
When going at the desired speed (say 40mph) and there is lots of coasting room, I just let go off the accelerator and the car basically coasts. The engine RPM drops from 1600-1800 down to 900-1000 and it actually can coast a long way. Sometimes, I need to go faster (if I'm initially started at a slower speed) and when I press the gas pedal slightly, the tachometer shows the engine rpm jumps from the coasting 900-1000 to 1600-1800.
Is the tachometer (add on by ScanGuage) reporting it correctly? Is this a bad form of acceleration for the engine?
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I have an 05 corolla XRS. I just had a sport clutch put in about 1 year ago. Whenever I shift into 4th gear and accelerate, the RPMs drop about 500 and I lose power for about 3 seconds before it starts going back up. Other gears are acting normal. Best part is that I let my friend drive the car earlier and since he did it's been doing this.
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After having the stereo replaced over the weekend, our car has now developed a whining sound that increases with rpm's. My wife didn't notice the whining sound until today, which means the car was driven at least around 100 miles between the installation and this morning when she noticed it after leaving the house.
It sounds the same as I've heard before when the alternator makes a noise through the speakers, however the sound doesn't sound as though it's coming through the speakers. With the Pioneer unit that we have, you can turn off the audio source, but I don't really see a way to completely turn off the unit.
I went down with the thought of removing the fuse for the audio system, however the manual states that at the time of writing, they couldn't document all of the fuse mappings and to refer to the dealer.
We have an appointment in the morning to have the dealer check out the noise, but if it ends up being the stereo install that caused the problem, I'm thinking they may charge me for the service visit.
Which fuse controls the stereo so that I can pull that to see if the noise stops?
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I have a 2000 Neon with about 170K miles on it. with in the last 2 weeks it has been having a problem with acceleration. When i start to drive the RPMs will get up to 4 before it will start to move. Also when i am drive and need to pick up speed the RPMs will also go up to about 4 before it starts to pick up speed, but will drop back down when the speed goes up. I have found a little oil in the spark plug tubes and will be changing the seals out, and I have cleaned to MAP sensor as will. What is going on with my acceleration.
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I have a 06 B6 that I am having issues with. We took a trip to Vegas in June and had no problems the entire way. We get home and the next day he starts throwing a CEL. We take it to our mechanic to have him VAG COM it and he says it is running rich at idle. The mechanic says that we may have gotten some bad gas when we left Vegas. Ok, no worries, we put new gas in the car along with some fuel cleaner and it seems to be ok. I drive the car 7 miles each way to work, and the way I break is that I coast into it before I brake. I noticed that the RPM's started jumping around. My husband took it to the mechanic and he said to clean the MAF and to take the intake off. Done, still getting a CEL.
So I take it back to the mechanic and he says its the seal inside the High Pressure Fuel Pump, while because of the CamFlower/Fuel Pump issue the only one in Phoenix is 50 miles away and at an Audi dealership that wanted to mark it up 50%. He also said that it smelled like fuel under the oil cap. So I go and get it, only to get it put on (Wednesday), everything good and then I notice today(Friday) that it is still jumping around. I have had the code cleared today but I am afraid that it is still something else. The CEL is off but for how long I dont know.
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I assume it's normal but at say 35 MPH or so coasting down a hill when applying the brake the RPM's rise to around 3K. Auto downshift to support braking?
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In cold weather at low rpm's, my truck has poor acceleration until the rpm's increase and it takes off. I replaced spark plugs, wire, cap, and rotor.
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I have a weird issue with my 2002 4x2 manual Nissan Xterra...when I drive along (usually happens when I'm in 3rd or 4th gear), and depress the clutch pedal to start slowing down for traffic, while the gear lever is still in the 3rd or 4th gear position, the rpms start coming down as the car coasts, but then a strange grinding/whirring/grumbling noise starts happening. The noise immediately goes away if I pull the gear lever into neutral, OR if I re-engage the clutch to start accelerating again. So, it only happens when BOTH the clutch pedal is depressed, AND the gear lever is "in gear". What could this be? The car has about 115K miles, but I believe the previous owner changed the clutch recently (80-90K), and the clutch itself feels fine.
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RPM's are dropping way off when coasting downhill while towing (as if the motor shut down), CC is on and maintaining desired speed. When at the bottom of the hill, all of a sudden, with a big bang(in the motor) the rpm's have came back up and you drive on down the road as normal. This seems to happen only when towing. "99 F250 7.3 I haven't pulled any codes as of yet. Whats happening?
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2004 Sienna LE with 193,500 miles. While driving home tonight I started hearing a grinding noise from the passenger front wheel. The noise goes away on acceleration and braking. Whenever I take my foot off the gas it starts to make the noise again. It sounds almost like a brake noise but I just replaced the caliper bracket this past weekend and the brakes look great (less than 20,000 miles on caliper, rotor and pads). I suspect a bearing may be going bad and want to know if these symptoms match a bad bearing. The wheel bearings are all original.
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The truck has 230,000 miles and has a squeal that sounds like a belt but it's not. I have put the truck in neutral coasted with the engine off and the noise is still there. The noise only happens when the weather is cold and only when the truck is coasting. Under acceleration the sound goes away.
Toyota Tacoma Prerunner 2003 (2.7)...
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When your car is idling the rpms drop below 600rpm and you can feel like its going to stall but then goes normal. How do i fix this? Clean throttle body???
Also how hard is it to change the transmission fluid? Possible to do it at home?
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I'm new to owning a Toyota. I just financed a 2010 black Toyota corolla S with 36 miles on it from a local dealership after i decided my last car was pretty much a money pit (2001 expedition)...blew the head gaskets, then after that was fixed developed a bad knock...anyhow i just decided i was overdue for a new car. Its a 5 speed manual and at highway speeds (65-70mph) I've noticed the rpms are bit high...like around 3grand. Is that normal? Just seemed really high to me, I really think this car would do great with a 6 speed. Also is the corolla governed? I was on a long stretch of road and i quickly got to 110ish with no sign of a governor kicking in...?
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Ran into a strange situation today. I actually noticed it last week but thought it was due to Seattle's recent surge of hot weather but guess not.
Anyway here are the symptoms of my 2010 Automatic Corolla LE. Upon turning on the car, the needles do their thing and rev all the way and then come back down, I have watched the RPM needle go to below 1 since I've owned the car. Now, it stays at around 1.5k to 2k RPM before going down to below 1.
While parked, or just when I'm at a light, the RPM needle fluctuates and flip flops between roughly 800 rpm to 1k rpm every few seconds. I can hear it happen sometimes.
Because it hasn't happened in 3 years until now, I'm assuming this is not normal. Or is it, and is just regular wear and tear?
The only thing I have in terms of engine mods is the Takeda SRI, and I've had that for about 2 years with no issues. I have a 400W amp powering a pair of focals up front and a 200W sub in the trunk. But I've noticed all these issues when I have the radio off. I've been keeping the AC on 2 for the past week now, could that have something to do with it?
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I have a new to me 2009 matrix. I have noticed that the RPMs at around 2,200 when driving in town at 40 MPH then after a few minutes they drop to 1,600. I know I'm wasting gas running 2,200 RPM when driving at 40 MPH so I have started putting the car in neutral then quickly back into drive and the RPMs are at 1,600. I am also putting the car in neutral as I come to a red light or stop sign RPMs drop to around 900.
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I own a 1996 Corolla DX with an auto transmission which has a few issues I would like to fix. The biggest issue is that sometimes it stays stuck at high RPMs (somewhere near 3,100) without changing gears which makes me have to give it some extra torque momentarily to change gear and drive at normal RPMs. But sometimes it does the opposite, when slowing down it sometimes stays at a higher gear and won't change to a lower gear until I've slowed down almost to a stop.
Another issue is that it is very slow to accelerate, it just feels real heavy and I regularly have to give it a lot of torque just to be at equal speed with the rest of the cars on the road, does this have a fix? Other than that there isn't any major issue that I actually know about, for this reason I'd like to know what place you would recommend me taking my car to get a full checkup to find any issues I don't know about.
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