Prius (2004-09) :: Erratic And Uncontrollable Engine Surging
Mar 17, 2016
So, I was just driving home from work in my 2005 Prius (~78k miles) when the engine started surging erratically and uncontrollably. I don't know if this is the cause, but I hit a bump right as I was hitting the gas and so I wasn't surprised when it revved up at first. But, then I backed off and it kept revving. Then I took my foot off the gas and it was still revving and accelerating so I had to start braking to keep going the same speed.
It kept erratically surging and then letting off as I basically kept braking at different levels to maintain speed or slow down when I could as we were coming to an intersection. The light turned red and I managed to get to a stop even though it was still revving, so I hit the P button and the engine calmed down. So, when traffic started again I slowly put it back in D and it surged again. We didn't move much before we had to stop again so I put it in P again. I noticed the battery icon was down to a few pink bars so I turned off the radio and air. Traffic started again and I put it in D and this time it seemed ok. I detected a faint smell that I think was probably from the brakes/tires being overheated, but it could've been something else maybe. It drove normally the rest of the way home.
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It came on 2 months ago, took it to dealer, code said "erratic idle", it idled fine, smooth as it always has been, dealer turned of lite, said let him know if it comes on again.
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I have a 2009 F150 4x4, XLT crew 6.5' bed, 5.4 engine. The truck has a very strange erratic throttle behavior from a dead stop through low speeds, shifting seems very strange at low speeds too.
Dealer tried re-flashing the computer, but that didn't fix it. They talk about some valve that sounds to me like it's similar to an EGR function, but I cant remember what he called this valve. He explained the issue as exhaust gasses that are to be recirculated and burned, but the valve is opening at the wrong time, or stuck open or something so it feeds the fire so to speak.
Does any of this sound typical or common? Is this something that's hopefully easier to do than a spark plug change on a 5.4?
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I have a 2008 Prius.. All has been great except for the radio lately. In the last few weeks the radio will all of a sudden go into an uncontrollable loud static blast. I have to turn off the power to the radio in order to stop it. It continues as long as the car is running. Once turned off the radio is fine until the blast happens again. I have replaced the radio on warranty, but it still has the problem. I also have an external XM Radio attached, but I don't think that's the problem...
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My 2004 Saturn Ion, 235,000 miles, 2.2 engine is idling erratic when I turn on AC. It sounds as though the compressor is turning on and off. The air is cold then blows warm then cold etc. Is it the compressor or could it be a relay or fuse. It also overheated last week but not sure if problems are connected. I am idling car right now with AC off to see if fan comes on.
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I have an 05 F150. Last week engine started running rough, check light was flashing. Engine lost power and got more erratic. Had it towed to Ford dealer, Dickson TN. Dealer says "#2 injector has suck open and flooded the Cylinder and bent the C-Rod." Ok have put in another 5.4(not at Dealership) hummm new engine runs the same as the one that came out. Had A different Dealer check this engine they tell me the right bank is not making compression cam has jumped time.
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Started yesterday. Dry road. Brand new Perrelli P4s . at about 60-65 traction control comes on and car starts doing the "surging". I had the same tires on it up to this point so except for being new,no difference.
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My 2008 Volvo s60 did this in not one but two directions Volvo sent a corporate engineer but he found no problems but the also refused to check the ECM even after I insisted that this car always had low voltage issues...
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My wife was complaining of the ESC light came on and off. Rough idle. Also has a check engine lite.
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Having 55k on my 2007 Santa Fe, and having brought it in 1 month ago for that 46k check up, this is my problem since. It started with an erratic gas gauge last Friday ,my tank said empty knowing i still had 1/4 tank, so l filled it up, 30 minutes later light goes on seems no gas in it, 30 seconds later check engine goes on, the Fe is running fine though, I called the dealer and made an appointment for next week, he said as long as car runs fine I can drive it.
Engine light goes off when fuel indicates 3/4 full, but erratic gas gauge seems to fluctuate.
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Now I know I'm having problems when I go to start my car, and the check engine light starts flashing and my engine is idling really erratic. What could this be? I have a 2000 Buick Park Ave. I went to start it today.... problems. I have had this problem before and it seemed to correct itself.
I started my car. It was kinda rough when I started it. My engine started trembling and check engine light started flashing. I turned my car off and back on and it went away. No check engine light...no trembling..nothing!! Well, at least til now. I went to start it up and the same thing happened...really rough idle and my check engine light started flashing.
I was recently told it could be a misfire, but I was also told by a family mechanic that it could just be a faulty plug or shorted wires. Also, recently when I have been driving, my car has been feeling a little sluggish right around the 2nd gear mark, and I have watched my voltage gauge on my dash jump around a lot, anywhere from 11v to 13v. Could this be a symptom? Or the effect of something else? I don't want to get ripped of for something as simple as changing some spark plugs or wires.
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I know its a shot in the dark but my engine light came on the other night. Its a 07 v8 with 25k mileage. i started it up idled fine for 30 secs, then the idle started to get erratic up and own for 15 secs leveled off and the car ran fine. I drove for 10 minutes turned the car off for a couple of hours came ack started her up and engine light came on no rough idle or anything.
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I have a 2004 Hyundai Santa Fe with a 2.7 4wd. It has started fluctuating the rpm's and is shifting erratically. I have seen on here that it is possibly the TPS. Does the same in manual or auto.
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My 2004 Santa fe speedometer is acting erratic almost all of the time , sometimes it works right. I have replaced on sensor that is easy to get too, right below the air filter and the other is below the cable, but the hard part is that in order to remove the 2 bolts holding the cable in place part of the frame or steering apparatus is partially blocking the bolt where a socket will not fit over...
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My mechanic tells me I need the intake manifold gasket replaced (check engine light on, engine surging, running very rough). How much damage can I do to the car by doing this repair myself and screwing it up? I've done lots of repairs on my car before -- brake pads, rotors, replace oil pan. I also have a copy of the manufacturer's shop manual.
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98 Honda Accord with 2.3L has 354,000 miles on it and up until recently ran like it was still new. Have developed erratic idle speeds. When it is cold it idles around 1100-1200 rpm. When the radiator fans are on or the A/C compressor is on it runs around 800-900 rpm. These are normal speeds and great. However, when the engine is warm/hot, in PARK, radiator fans are off, and A/C compressor kicks off, the idle speed drops to what appears to be about a rough idling 500 rpm's and the engine can barely stay running. I've attempted to look for the obvious. I own the Honda Shop Service manual if there is a particular component or most likely suspect area I should start at.
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I'm experiencing erratic shifting ending in a stall after about 10 minutes of driving. The trans seems like its searching for the right speed then the engine stalls. I've heard about air in the trans fluid, which is caused by fluid overfill and I've heard about MAF sensor which I replaced to no benefit. Right now I'm going to drain the pan, install a filter and refill accurately, especially as I have the pan off?
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I just purchased a 2005 elantra with 133k on it and she runs fine other than a slight erratic idle. And by slight I mean it will jump about 50-100 rpm idling and every blue moon it will jump up to 250 rpm sitting there. After idling for a while my CEL came on with the following codes.
P0507 idle air control rpm high
P0506 idle air control rpm low
P0170 fuel trim malfunction bank 1
P0121 throttle position sensor
What could be causing this? I took the iac off and cleaned it with maf cleaner but it didn't work.
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I tugged on the little hose on the back pass. side of the engine,(5.4),...
and I could hear the vacuum leak that is apparently causing the erratic idle, and PO171 & PO174 to come up.
I know this hose is hooked to the Charge motion Control Valve on the back of the manifold,..I can't imagine what it does, as it terminates with some kind of plug or check valve??? Haynes say's to remove the entire manifold to get to the CMCV.
I can see it with a mirror,. I am thinking maybe long needle nose from Harbor freight,...bend the tip short,..maybe be able to change it out?????
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I have late 2004 with 130k with a bpd egr cooler and new oil cooler and new ficm from Ed. Cat delete with no muffler. Everything else is stock I have a dash boss and was noticing some weird numbers. My check engine light came on but I couldn't get any codes with the dashboss. I started monitoring the egr error and saw some erratic readings really high negative numbers after I let the throttle off. The truck runs okay but was kinda starting slow. Could my egr valve be stuck? Could my short modified exhaust be messing things up?
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My trucks symptoms include a illuminated service engine soon light, sometimes a high rpm idle, and sometimes a rough erratic idle. When a scan was done it indicated the oxygen sensor was defective. The issue is: which specific one (there are multiple oxygen sensors) or how could I check or determine the faulty one for sure. I am trying to economize and replace only the bad one myself if possible. I own a good multimeter, can it determine the bad one? 1999 F-150 4.2 Litre V6 oxygen sensor dillemna....
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