Recently it feels like the transmission is 'hunting' drops a gear, picks up a gear when driving constant speed on flat roads. 2.0T with tiptronic. Additionally, very intermittent, the car will get a shimmy around 48-50 mph. feels more transmission related and it is not the tires since it is an intermittent issue.
View 3 RepliesThis weekend I was driving home from my parents and noticed that on flat ground at a constant pace there seemed to be surging of some sort...Although I am not sure that surging is exactly what it was, but it is the best word to describe it.
Basically, if I kept my foot at an even speed (not accelerating or decelerating) I would get very subtle movement in what seemed to be either the differential or the transmission. No error codes were thrown and the battery gauge was spiked at 14 solid.
2000 Hyundai Sonata 2.4 L engine, transmission drops from 4th gear to 3rd gear at cruising speed (65mph) and locks into 3rd gear, I have to stop and turn the key off and start the engine again to reset the A/T what do you think is happening?
View 1 RepliesI have a 2006 GMC 1500 4x4 just under 100,000 miles on a GM crate engine, 266,000 on truck, runs great no loss of power, no drop in MPG. sill get 17-18 around town on 87. If I put 90-91 gas in when pulling a load I get 18 all day long. So were is the problem? I am getting spark knock. I have tried diffrent gas, just put in plugs and wires. Old plugs looked good. No Cel on, No codes. It happens when I am flat roads and going up hills. I did get to go away for 1 tank when I switched gas stations,but now all brands of gas do it. This has been going for 3 mo's. One more thing it all started after I made a 800 mile round trip puling a trailer ( just under 5000 lbs on trailer 2 axle enclosed). On that trip as always do I used 90-91 gas.
View 3 RepliesHave a 2013 Passat Tdi. It seems that sometimes when i accelerate the car doesn't move it has a flat spot as if the transmission is trying to catch a gear. I know this might sound minor to some folks. However on several occasions I've pulled out into oncoming traffic not expecting it to have a flat spot in the car not moving at all. What's up with this?
On the highway no problem and normal acceleration no problem but if you're going from a stop or pulling away from a intersection seems that happen more so than I would like.
I have a 1997 Toyota Hilux (unleaded, not diesel) and I'm looking for input as she keeps breaking down but no one is able to figure out the problem. While in gear and driving, the gas stops engaging and the speed slowly drops. The car stutters while slowing down but then if I switch gears or rev the engine it will stop. After some time this continues to happen more frequently (at all speeds) until the car eventually stops and dies. Try to restart and the engine will turn over but not start. After sitting for a night or so, though, she starts up and runs just fine. Thus no mechanics have been able to solve the issue!
Could be a fuel problem as the exhaust pipe makes a banging sound when this happens, but it could also be electrical.
We have a 2003 Passat GLX, 43000 miles, V6, AWD. I've noticed recently that when driving at constant speed the engine will surge about once every second or two. It's very regular, and on a smooth road I can also notice a bump in the drive train, very similar to road bumps.
I've taken it to a dealer, since I believe it is a transmission issue, and therefor covered under warranty. There are no computer codes stored for faults in the transmission, they've said. However, they started by pursuing the fuel injection system (though no code was stored), and then wanted to fix a faulty coolant sensor (since found not to be faulty).
I have a 2000 Lexus RX300 with 210,000 miles on it. We recently started to have some transmission issues. It sporadically drops into 1st gear while driving. We had the transmission fluid changed, and it did work for a short time, but it has recently started again. Is my transmission going to completely fail or is this something that is serviceable? We are trying to decide whether it's worth it to keep the car and fix it and drive it for another 100,000 miles or sell it. It looks great and drives great, otherwise.
View 3 RepliesMy 2000 Passport is really sluggish when taking off. It goes really slow and then eventually picks up speed. I was thinking it was the transmission but last week the car wouldn't start either. So we replaced the battery and then it started. Wondering if this is an electrical issue that is causing this and not the transmission.
View 1 RepliesThe car starts well every time even though the revs go up then down for just two seconds before stabilizing at normal rev count. Sometimes while driving the car would just stall and loose power even though my foot will still be on the accelerator, if I pump the accelerator it will wake up and move on nicely like nothing ever happened. I've had this problem for the past two months now and it happens atleast 5 - 6 times a week randomly. the problems is beginning to get worse. The car has an automatic transmission. I've changed the fuel filter and air filter only in the last 20000kms. the MAF is ok because when i unplug it the car switches off and won't start again. every time i open the hood and rev the car a bit i can hear what sem to be huge suction of air somewhere next to the throttle body.
2011 Golf mk4, 1.8L...
This truck has 180km on it and runs fine except as of lately i have developed a surge while at constant speed. When i step on the gas it does not seem to happen.....it only happens when I reach a constant speed. The odd time it will surge at idle and the engine will rev up and down on its own also. When at highway speed it seems to not do this. The truck never dies completely....just surges slightly.
View 9 RepliesA few days ago my 98 C1500 started having what I can only imagine is some type of torque converter issue. While driving at a constant speed the RPM will surge by about 500-600. This surge does not coincide with any type of acceleration, it's more like the converter is letting go and the RPM's just rise and fall back down. The fluctuations also seem to stop after about 15 minutes of normal driving. I have had no real noticeable transmission issues. At first i assumed it was my tranny fluid just breaking down so to get me home I used a bottle of Lucas.
The bottle seemed to do the trick for only a couple of days and now the problem is back...no better, no worse. The only difference I have noticed is that before the addition of the Lucas my fluid looked perfect and now it seems there is a bit of varnish. No smell, nothing seems burnt, just a little dirty. I haven't changed the tranny fluid for about 70k and the truck now has roughly 160K on it. My concern is that if I do change it the transmission will crap completely and I'll be on the hook for a rebuild.
I have a 2002 camry with 212000 miles on it and just lately when driving at a constant speed 60 mph or over it starts to buck or jerk a little bit and you can feel it in the seat. I've had the throttle body cleaned and put in a new mass air flow sensor and it hasn't fixed it yet. What might be causing this? It doesn't do it when accelerating or slowing down.
View 9 RepliesMy 1996 Honda Accord V6 has a stuttering problem. It only happens (or is only noticeable) when driving at a constant speed. It is most noticeable when driving in the 45 - 55 mph range. It feels like the engine has millisecond breaks in power. And this does not happen all the time. Some days, it drives just fine with no problems. It idles fine. The problem is not noticeable, if there at all, during acceleration.
One other piece of information that might - or might not - be relevant is that the tachometer seems to be out of its mind. It bounces all over the place up and down. This also does not happen all the time, and it seems to me, though I'm not 100% certain, that the stuttering problem only happens when the tach is crazy..I have had no luck getting a mechanic to diagnose the problem. They claim the tach problem is totally unrelated.
my 2006 GX has 95000 miles and recently i've noticed a slight hesitation followed by a slight surge in speed while driving at a constant speed. it almost feels like i'm pushing the accelerator then releasing it. its a very mild difference but i'm guessing tranny and have 5k left on my warranty. it occurs at a variety of different speeds but most noticeable at about 35-40mph and up around 55mph.
View 6 RepliesI have an 04 Elantra GT and have been noticing a jerkiness when driving at a constant speed on the highway. I haven't noticed it around town or while accelerating. I also have noticed that when I disengage the clutch on the highway, the engine sometimes doesn't respond right away, or it even may surge. This has happened when exiting the highway when I disengage the clutch. The engine will slow, then speed up close to 3000 rpms.
I also had a check engine light come on and couple months ago. The code indicated that the upstream O2 sensor was bad. I took it out and cleaned it, but didn't replace it. Is this a likely culprit for this set of symptoms? If so, how can I test the sensor to be sure? I heard that I could disconnect it and run the car and see if the surging lessens, but wasn't sure if that was a good thing to do.
I have a new 2015 Subaru Forester and I noticed the following problem: When driving at a constant low speed, in the 20-30 MPH range, the car bucks/hesitates slightly off and on, while driving. At first I thought the engine was missing, but I noticed the RPM was at about 1000 RPM, very low. And a missing engine would cause a "check engine" warning.
So I think this is a combination of the CVT and the engine lugging. The CVT should move down a notch to a lower "gear" but it doesn't, so the engine is forced to operate at a problem speed. A normal transmission would downshift, I would think.
Can I do anything to solve this, other than manually shift to the low range?
I've been noticing that my 2012 Passat TDI with 125,000 miles, hasn't been shifting to 6th gear when driving down the highway. I've actually noticed it's one gear too low even when driving down city streets. We have been experiencing extreme cold weather in Pennsylvania, so perhaps that's a factor.
If I manually shift to 6th gear, it stays in gear, but it appears that the engine RPMs are a bit lower than usual as well, but I could be wrong there.
have a 98 rodeo, with a V6 & Auto trans. have an intermittent problem - as I am driving engine will occasionally drop to idle speed and then pick back up to driving speed. Engine keeps running smoothly, just at idle speed.
CEL does not come on / no codes
Replaced Throttle Position Sensor - and thought I had found the problem, but since it is so random, it just didn't happen again for 1 1/2 weeks.
I have a 2001 elantra gls automatic. I have am suffering what seems to be a common problem with these. while driving my car randomly drops into third gear, also sometimes it sticks in like second first (like 5000 rpm just to go 30). my brother put a computer on it and error codes popped up: p0500 vehicle speed sensor; p0501 speed sensor range performance; and p0720 output speed sensor. I checked all the wiring and none of it is damaged, so I'm thinking bad sensor. What i really need to know is, could one of these sensors be tripping the others and if so which one? or should i replace all 3?
View 5 RepliesJust got the car back from the dealer a couple weeks ago after the engine was vibrating. Replaced one of the valves and it worked great. Now a few days ago I was driving home and the AC just flat out died. I know the 06's have a problem with the AC, but I think this is something different because the fan doesn't come on at all (with the AC on or off) either. When I turn the AC on, there is absolutely no response. RPMs don't go up as they would when the AC unit comes on, the fan doesn't come on... nothing. All that happens is the yellow light on the AC button turns on. The compass on my rear view mirror doesn't come on either. The turbo doesn't seem to kick in at all. If it kicking, it's very very weak. This all happened at the same time as the AC failure.
I checked the fuses, and everything seems to be okay. The console, for the first time ever, is saying I need to take the car in for maintenance in so many miles and in so many days. I've never gotten this message before. The car is 100% driveable though, other than the lack of power due to the turbo not coming on and not having AC in these hot 100+ degree days...