Prius (Gen 2) :: Engine Revving Up When Cruising At 70-80mph With Little Throttle Input
Dec 7, 2010
I recently took a long drive, and on 2 occasions, I heard the engine revving up when just simply cruising steadily at 70-80mph with little throttle input. I checked the LCD screen drive-train diagram, and there's no indicated of the engine turning during the revving. The car does not accelerate during the revving. Happens say for 10 - 20 seconds each time. To stop the revving, I simply give it a bit of throttle. I'm not on Cruise Control. Its a strange feeling, and I hope this isn't connected to the runaway Prius syndrome.
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I got in a work truck yesterday, sat down, put my seat belt on and started the truck. Just as I did that another employee drove by and waved, all I could do was nod back at him because my hand was still starting the truck. This took my attention away for a split second, then as I put the truck in gear, my foot still on the brake, I noticed that the tachometer was pegged and the engine was racing. I instinctively pushed harder on the brake pedal, then looked down to be sure that I was pushing on the brake pedal and I was. Right then then rear of the truck started shaking violently and as fast as I could I turned the key off and put it back in park. This all happened in about 1 second, maybe 2.
The shaking was caused by the sheared off driveshaft. And it was sheared off because the center section of the rear differential had broken the spot welds that hold it and place and rotated on the axel housings. It is now pointing upward towards the bed of the truck. Have a drive by wire truck run the engine at wide open throttle with no input from the pedal? 2010 F150 4.6L...
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I've been getting a surge or revs when getting up to cruising speed before it drops into overdrive or or a constant speed. Happens around 1800-2200 rpm before up shifting to the next gear. More noticeable if under a load or going up a grade when it will hold gear longer before shifting. Only thing I can think of that would be related is the truck does lack some power on a cold start for the first couple miles before getting up to temp. I've cleaned the ebp sensor and it appears to be working correctly, reading within .1-.2 of BAR/MAP key one engine off. VGT solenoid is clean but have no real way to tell if it's working correctly. Other values icp/ipr temps fluid levels appear to be correct. Just changed the oil and it continues, changed the transmission oil and filter about 3000 miles ago. I've had this going on for about 1000. Started about the same time I changed tunes to PHP. They haven't been able to find anything in the tuning yet that could be causing this or if it is just making it show up now.
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First ever failure with a Toyota. We limped home at 25mph this morning. No response with throttle pedal input, but the throttle body did operate in fail safe mode. Throttle pedal checks out with omhs check across the terminals per Toyota manual. I'm looking at having the car transported 45 miles to nearest dealer. I can change the tb out myself but not sure of the electronics. Does the computer have to be programed for a new tb?
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Anybody have any issues with this? I have a week old r-line and had the epc light come on, turbo seems to spool heavily with little throttle input and seems a bit sluggish.
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I have a 2003 Jetta 2.0 with the drive by wire throttle and I've been having some problems with it lately.
When on the highway (at a constant speed) sometimes it's almost like you take your foot off the accelerator pedal, then when you go to press it more, nothing happens, until you pump it a few times, it works again. This sounds like an electrical problem to me, not fuel or spark, because it's not sputtering at all, it just ignores your accelerator input. Is the "throttle module" a serviceable part?
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Mark IV GTI. Neuspeed intake, chip, exhaust. The situation is...
When driving enthusiastically, harder, and sportingly, the car runs beautifully!
When driving normally, such as highway cruise or lower speeds with a consistent throttle input, the power will cut-out. Then the max boost pressure will be approximately 3 psi until the key is cycled. Then normal chipped operation resumes. Since it is difficult to drive hard all the time, this circumstance comes up often.
There is a new N75 recently installed. The situation does NOT set off the check engine light.
I have noticed according to the boost gauge readings, it tends to happen between 10 inHg to 0 psi. Above or below that, don't recall it happening.
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2002 Elantra auto trans issue.
We are experiencing NO throttle after the car sits over night. But Not every time. When I write "NO throttle" the car will start but will not increase rpms with pedal input/movement. Runs at idle only. After a few minutes, it picks up the pedal input and is fine until is sits over night, sometimes.
I have changed out the TPS and no change. The car has just over 80000 miles and otherwise runs like a champ. There is no check engine light or any stored codes. The cable rotates freely at the TB. I read in the forums that the TPS replacements can be suspect.
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I just took a long road trip from Tampa, FL to Houston, Texas and back to Tampa in 5 days. I get 38.9 MPG according to car computer after 2287 miles. My prius is equipped with FRS wheel, 215/50/17 Continental Procontact Ecoplus, Air pressure is 50psi on front and rear. I wonder how much other Prius owners get? I heavy on my foot. I usually keep the speed 75-80mph. The result is also included total ~15 hours idle since I had one night sleep in the car.
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I just had an exhaust manifold replaced on my F-150. It has the small 8 cyl.. While the manifold was leaking, the truck of course ran like crap.....spitting, sputtering, barfing, etc.
Now that the manifold work has been done, the truck runs pretty well, except for some intermittent increase in throttle (not by me) when cruising at highway speeds. This is comparable to the "feathering" of the throttle that you would do when checking for engine noises.
Hard to explain without feeling dopey, but kind of a mild ruuum, ruuum, ruuum out of nowhere when I'm cruising along. I drive a 5 hr. trip every weekend, and it will do this about every 10-20 minutes.
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Today and yesterday day mark the first time since I have owned my truck, that I have really taxed it with a load or serious work.
I have 8126, miles to date, and hadn't felt this annoying and somewhat pronounced shudder at throttle- tip in. Only from a dead stop. I'm doing some work to my house, so as I type this I have about 700-800lbs in my box. I've never felt this shudder empty as I do with a load, and starting out on an incline.
It feels like the rear is rolling over a "rumble strip" for the first few feet of throttle input, between 5-10 mph and then smooth everywhere else.
Rob- if your reading this, I can't remember if your shudder was similar, or if yours did it empty or only when towing or hauling a load.
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My 2006 expedition surges very slightly while cruising under very low throttle. Usually most noticeable at 60-65 mph with no headwind.
Took it in and had my mechanic check it out. He confirmed the slight surge and said it felt like the torque converter was locking and unlocking. No codes or pending codes were found related to the power train.
Abs light is on for a bad rear wheel speed sensor. Code for right rear. Checking the sensor showed 3 ohms for right, 5 ohms left ( left is less than a year old on a new wheel bearing.)
Initial thought was the bad sensor is giving bad input confusing the pcm/tcm. But the condition remains with the sensor unplugged.
Driving down the road watching the tach, it does appear that the converter is not staying locked. Condition goes away with more throttle. Motor runs smoothly otherwise with no indications of misfire. Plugs have 50k miles on them, as does the transmission fluid. Fluid is red and smells fine. Never gotten hotter than 210 by the gauge in the pressure port.
Why would it lock/unlock at very low throttle, but lock tight with more throttle? Tps flaking out? Throttle body motor getting twitchy? Can I pull my popup to the hills this weekend?
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I was heading home last night from work and noticed something odd. It was the first pretty cold night that we have had around 20-25 deg. and I took off from the parking lot like normal.
When I got to the first stop light about a mile down the road I heard what sounded like the engine revving up right when I took my foot off the gas pedal. It did this as I coasted to the stop light. It also did it again at the next stop light just up the street. I thought maybe it was the heater blower, but It really sounded and felt like the engine revving. The car did not accelerate or anything, is this part of the warm up or normal? I also have the lower grill blocked but I don't see how that would make any difference.
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I noticed that when I'm stepping on the gas pedal, revving up, when I release the gas pedal I can hear the engine revving up some more instead of slowing down.
When I release the pedal even if the revolution light on the dashboard shows that it is slowly dropping, the engine is still making the noise as if I am stepping on the gas harder for about a second.
Example: I am at a stop, when I start going from 0 to 30 mph, if I release the gas right away that's when I notice this issue.
This doesnt happen when I'm cruising on the same speed and suddenly release the gas.
I wonder if this is an indication the my tranny is having a problem.
I have a 2013 prius C 2...
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I have a 2001 Prius and I replaced the modules with Gen II. It ran fine for awhile then the red triangle came back and the ICE would have a high revving sound and the brake warning light would come on. I can make this issue go away but pulling over and turning off the car and turning it on again. I pulled codes 3000 and 3006 and understand the problem may be uneven battery module levels. I have been driving it in an attempt to see the the modules will self level. An earlier dealer diagnosis also recommended a system main relay replacement which I did not do. It drives fine most of the time but maybe once a week the high revving issue comes back.
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I'm driving to work this morning and a bunch of warning lights came on. I was going uphill and the car wouldnt accelerate, the engine was revving up and my presses on the gas pedal didnt seem to be doing anything. I had to pull over a couple of times after shutting the car off and letting it cool down. Each time the car would eventually display the loss of power (would not accelerate, and engine seemed to be revving high with no input felt from gas pedal). Shutting off car and turning back on would cause this to go away.
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I am afraid to drive my car on the highway and if I am damaging my car by driving it I want to make sure I hold the auto care shop that put the wrong size tire on my car responsible.
I have Bridgestone Ecopia EP100 BL tires size 185/65R15 on my 2007 Prius that I got in 2010. Because of a nail in one tire I had to replace one of the tires two days ago. The technician said they did not have the exact same tire any more but he would replace it with something comparable.
The next day I drove 2 hours on the interstate and the slip indicator light kept flashing, it felt like the engine was revving a lot and/or the transmission wouldn't shift when I got to highway speeds, and it was a little scary. My first thought was something with the new tire since I had absolutely no problems before.
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Last night I bought 2000 F250, 346k on it... Crew cab short bed 4x4 with ranch hand bumpers like I wanted .... Headed back home (Miami FL ~1100mi) and covered about 200 miles @70-75mph before i ran into few problems ....
First off, while cruising I noticed slight hesitation in the throttle, with loss of speed regardless of pedal pressure, noticeable on inclines. It would go away on downhill and get smooth response again and pick up speed. This went on for about 40 miles.
Then I noticed heater blower stop blowing hot and start blowing cold, without me changing any settings. At the same moment, I noticed temp gauge move up and I hit next exit offramp to check what's up. During right turn at the end of off ramp truck stalled. Pulled to the shoulder, and popped hood.
Noticed empty degass/overflow bottle. Carefully opened lid and water gushed up to the top. When all pressure slowly released, water pulled down and emptied the bottle. Both upper and lower radiator hoses are empty. Engine oil has no traces of water tho. There were no leaks under the truck. I then tried to fire up the truck to get me to the gas station 1/8th mile away.
No crank in Park. WTS comes on and goes off. Cranks in Neutral, RPMs come up some, oil pressure shoots up to normal running position, but won't fire. Tried a while then gave up as not to kill starter and batteries completely.
Fuel pump works 20 sec then shuts off. There is fuel in bowl. I covered 140 miles since last full fill up, so not fuel pickup issue I don't think.
Summary
Have crank
Have RPM
Have oil pressure
Have fuel
Have (had) batteries, now not so hot
It's cold out ....
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My girlfriend has a 2004 Prius with the nav kit and has been having some rather odd issues as of late, of which seemed to have started after she hit an animal. The gas engine in her car seems to be turning on right away when she turns the car on. The engine also sounds quite loud, almost as if it is revving. Her gas mileage has also dropped considerably, from 45-ish down to around 33 mpg. Also, upon stopping, the mileage gauge on her nav screen doesn't immediately go to 99. Instead it sits around in the 40s for a while before jumping up to 99.
Now, she mentioned this to the tech at the dealer when she finally went to get the recall done on her water pump, but the guy said it drove fine and threw no codes. She then took it to another shop who said it threw a P3190 code, but he had never seen this issue and wouldn't know how to fix it.
The only thing I could find while searching around (mainly on this forum) was that it could be a problem with the electric throttle body. The throttle body seems to make sense to me, but she isn't totally convinced. She also has a 200+ mile trip coming up for the holiday season and it would be nice to fix the issue before that.
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I bought a new 2014 Prius plug-in base model two weeks ago. No problems until yesterday.
The engine has started revving really loudly on occasion. It's much louder than the normal ICE noise in hybrid mode - 2 or 3x as loud (much louder than our regular Honda Civic engine).
When the revving happens when I'm in EV mode, the EV mode light on left side of dash stays on (but it's clearly not in EV mode). The EV and Eco symbols above the power bar go blank. The MPG won't go above 25 mpg, no matter if I'm not touching the accelerator. Switching from EV to Hybrid mode and back does nothing.
The only way to get it to stop is to stop the car, turn it off, turn it back on, and then it's fine - EV or Hybrid mode, it sounds normal again. I have not tried to drive more than a mile with the noise to see if it goes away. It occurs when:
-If the fan, heat or defrost is on when I turn the car on - turning them off doesn't stop the revving.
-If I switch the fan, heat or defrost on when stopped at a light - turning off doesn't stop it. (But it doesn't happen if I turn heat or defrost on while moving in EV or Hybrid mode.)
-If I switch from EV to Hybrid mode while stopped at a light.
The weather is cooler now and I'm fine with the ICE starting to warm up the engine, the compartment, etc, but the revving noise doesn't seem normal.
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Our 2005 Prius with 160,000 miles is displaying warning lights and the gasoline engine is reving at times and not shutting off when the car is at a stop light.
The dealer says it is throwing a P3000 and P0A80 codes. I asked for subcodes, the dealer doesn't know what I am talking about.
The dealer wants to replace the hybrid computer for $900 and if that doesn't fix it they want to replace the hybrid battery for $3500.
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