What are the symptoms of a bad o2 sensor, 2.0.. My son is having some problems with his car hesitating when he gets into the throttle and the only codes we are getting shows bad O2 sensor pre cat.
View 2 RepliesCar is a 20th, 1.8t 6-speed.
I noticed something the other day that is happening occasionally on acceleration. At partial throttle, usually pulling away from a light or stop sign, I get this weird hesitation. It only happens at partial throttle and usually only in first, sometimes in second. As the RPMs increase up to around 3k, it's as if I lose power for a second. You can feel the car stop accelerating for a second, then it begins to pull again.
If it's under heavy acceleration it never happens. It doesn't feel like the clutch slipping, more like the motor hesitating, but there's no noises or missing or anything like that. The RPMs don't jump up or anything. It's like for a second it's making no power, then it comes back.
I decided to take out the throttle body and clean it with throttle body cleaner that I got from autozone, after I put everything back, I started my car and the motor was shaking and smoking a lot out the muffler and just would not be drivable at all. the RPM was just going up and down and hesitating bad. later I took off the spark plugs and they were very much burnt black at the tips and that is probably not normal right? but I replaced them with NGK BKR7E spark plugs and it still gave me the problem.
View 13 Replies I have been experiencing this one for quite a while now. The car is a 2003 GTI VR6 24v. It is stock other than a 3" hole in the bottom of the airbox to pull in cooler air.
When I am sitting in traffic, and in 1st or 2nd gear, keeping a consistent speed (10-15mph) and application of the throttle (not moving my foot at all), the car sometimes just decelerates/hesitates/bucks a little by itself, and kind of feels like it is hiccuping or not getting enough air or something.
At high rpm, or in any gear above 2nd, I don't feel the hesitation and the engine runs great and pulls hard. No MIL lights on the dash, and no other problems with it.
Is this normal for manual VW's? Or maybe the hesitation coming from the engine not getting a consistent airflow from the hole in the airbox?
So,I have a mk4 GTI vr6 . I've got an idle that moves about 25 rmps up and down. As well as the throttle hesitation between 2.000 and 3500 rpms only at mid throttle. Has a kinda new maf. That I cleaned. clean THrottle body kinda new coil pack and wires , new plugs. Tried a lot it all worked but it's still there.
View 11 Replies2001 1.8T Wolfsburg
Started it this evening and went to the store, on my way there the car was right messed up. No lights, wouldn't go over 500 rpm (no throttle response), eventually was stuck on the side of the road. Reset my throttle back to OEM and everything went back to normal, car hasn't shown any trouble since but it's only been a couple hours. I don't want to end up stranded somewhere so I'm wondering if my computer is possibly failing or should I try replacing the throttle body if it does it again?
Car is not chipped and was OEM throttle before (to my knowledge).
Where to find this wiring diagram? I was getting hesitation in my throttle and the EPC light kept going on.. So I did some looking and found that 2 wires pulled out of the plug in the cowl harness... There are like 5 plugs under there, and these 2 wires were pulled clean.. So I cant tell which one goes to which... I know its definitely part of the 4 wires going to my pedal...
View 2 RepliesHave any other PP 6MT owners experienced strange throttle hesitation while shifting with a APR 1.2 HO tune? I know what turbo lag feels like, but it is almost as if the throttle position is not being read for 1-2 seconds after shifting.
No matter how hard/fast I shift, I can't get the tires to chirp, even shifting at high RPM. When I watch my speedo after shifting, the needle does not move at all until the delay ends, and of course it moves fast when the boost builds. But for 1-1.5 seconds after shifting, with the pedal to the floor, I would expect some acceleration, even not at full boost.
Even when not shifting, and going from no throttle to medium/full throttle, there is a delay with no acceleration and no significant noise/rev build.
I don't remember this being as pronounced before I was tuned. Also, I had GFB DV+ installed about the same time, but I would expect the DV+ to make this better, not worse.
I finally decided to take my car in to the dealership for this random split second hesitation that mostly happens in first gear. I have 8600 miles on the car and it has done it since the day I bought it. I thought it might have been compressor related from running the AC. I have tried driving with no AC and ESP off and it still does it.
So I take it in and they decided to let the new guy work on my car. I take him on a ride (AC and ESP off) and sure enough it does it nice and strong for him to feel it. I was happy so we went back to the dealership and they gave me a 2.slow rental and I was on my way. 24 hours later they call and tell me, "Ron we believe it might be your throttle body so we're waiting on the regional master tech to get his opinion before we put a $750 part on your car".
I'm like "ok, whatever you say, just call me tomorrow with an update because I don't want it back till it's fixed". They call me the next day to inform me that my brake light switch was faulty ($10.25), they replaced my wiper blades, adjusted my wiper arms and the car was ready to be picked up.
Now that I have it back I can say driving it now that it's acting normal is an adjustment. My mind expect that hiccup but it doesn't happen, at least not most of the time. I'm not completely convinced that this hesitation is gone because I think I felt it happen once yesterday. Time will tell... In the mean time it is 95% cured.
I've noticed that my throttle response is pretty weak. Doesn't seem to just go when ya put the pedal down. I mean it goes but not as fast as i think it should. is this how it is on all our cars? kinda seems like it has a hesitation or something. Anything I could do about this?
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I have a 2011 GTI which has about 46k miles on it. The car is stock other than some VagCom stuff. Over the last few months I have noticed a worsening problem which is getting bad enough to start being annoying. Under very light throttle such as cruising along or rolling off the throttle to shift, the car has a slight miss, almost like it's surging. It happens in any gear, typically around 1500 - 2200 rpm, and I first noticed it actually on the highway using cruise. It seems to happen most before the car gets nice and warm. It has not thrown a CEL, but I have scanned it and found some misfire codes, although I believe those to be from a really rough cold start which sporadically happens maybe once every six months (last time a couple weeks ago).
I have it booked into the dealer but I can't get there for a couple weeks. I don't think it's coil or injector related because it runs fine under high load and high rpm. Fuel filter has maybe 2500 miles on it, always use Shell 91. I really think it's probably carbon buildup but I am hoping the dealer doesn't just give it the old "cannot replicate" since the car is not triggering a CIL yet. It's pretty obvious when you drive it though that something is off. If they play that game I'll probably just go ahead and do it myself.
I don't put many miles on my car, so even though I'm going on 2 years my 2010 GTI (6 speed manual) only has 11k miles on it. Over the last few months I have notice that when starting out in first gear on a hill, as I let the clutch out I will sometimes (not always) hear a squealing noise that isn't insanely loud but definitely noticeable and sounds like a cross between chewbacca and an elephant. It goes away once the clutch is fully let out and I start moving. Over the last couple days I've noticed a hesitation in the throttle occasionally, as if the power is just dying. But, the rpms don't suddenly rev up when this happens (as I would expect if the clutch were slipping). It just feels like the power is dying and hitting the gas has no effect -- the car just slows down. Happened today in 4th gear going about 45 mph -- car just started to slow. 5-10 seconds later it recovered.
Could this all be due to my clutch? If so, can it be adjusted or does it require a new clutch? It's under warranty. Problem is it's intermittent and I just know I'll drive all the way out to the dealer and it won't do it on command. I am APR stage 1. But I don't drive hard at all.
Golf VI 2.5 automatic... I seemed to notice a dead spot in the throttle when taking off from a light. You press the gas, nothing seems to happen. To start from a stop sign, you have to really give the car some juice to get going, which ends up being too much throttle and sucks gas. In other words, very difficult to take off at a moderate pace from a stop. Seems like all or nothing.
View 13 RepliesMy GTI is the first FWD car I've had since 1985, so the issue that I'm having may be just me adapting to a front drive platform. Here's what's happening: when I nail the throttle in 3rd or 4th gear, on or about 4K rpm or above, the car feels as if it's hesitating slightly as the revs climb.
It accelerates fiercely (I have the JB1, and I had the Neuspeed Power Module before it, and it's reacted the same way with each mod), and it's almost as if the front end of the car is lifting and struggling for traction (although the traction control light doesn't come on).
Is what I'm experiencing normal FWD behavior? Is it the beginning of torque steer? I only notice this at full throttle--not noticeable at all at partial throttle. Also, it doesn't happen consistently. My car is a performance package manual.
I recently picked up a 2000 jetta vr6 for a very good price its a glx I have owned a vr6 before and done timing chains myself on it this one is a glx , I am having 5 fault engine codes on my vagcom they are cam position sensor , knock sensor, secondary injection pump, and mass air flow it ran fine 100 miles yesterday this morning the epc came on then went off and ran bad can these codes all be related or do I have to replace each sensor individually..
View 9 Replies2004 VW R32, No engine mods. I did have the vacuum line sealed off for the flapper mod for about 3 months but is is now back to normal.
I've got the MIL, ESP, and EPC lights on and scanning codes as follows:
Code-P0222
Definition:
- Throttle pedal position (TPP) sensor/switch "B"
- Circuit Low
Explanation:
- Open or short circuit condition
Probable Cause:
- Poor Electrical Connection
- Faulty TPP sensor
- Faulty throttle valve control module
I don't know much about the situation but I took it to my friends shop first where we replaced the Throttle body, intake, and MAF. Didn't fix the problem so I took it to my local VW dealership and the tech's exact words were.."the codes coming up as a throttle pedal sensor. Is there perhaps a sensor by the pedal that I could check?
Am getting an EPC light + limp mode + code for accelerator position sensor (implausible signal). I have swapped out the pedal assembly, so it isn't the sensors themselves, and we've checked the wiring to the pedal assembly... I can feel in-car, and I can see via VAG-COM that one of the two sensors is basically toggling between a sensible % reading of pedal position at one moment, and then zero % the next, and of course every time the sensor reads zero, the ECU notes the error and cuts power... but this only happens when the steering wheel is straight or when turning to the right; I can drive around in a leftward circle all day and night without this occurring.
Why? What is there in the steering (either in the column or at the wheels, or basically any place in between) which, if malfunctioning, could affect the accelerator position sensors in one way or another (i.e. either through the normal operation of a safety system, or through a short or other electrical gremlin)?
Have a 2004 Jetta, 2.0L BEV auto..has 124,800 miles on it...when cruising on the highway the car seems to momentarily lose power like as if i let off the gas. Car has the original everything for the most part. Did the water pump and timing belt 2k miles ago. Maybe alternator? fuel delivery?
View 5 RepliesI have a VW golf 2.0L AEG with 5 speed manual with 150,000 miles. Lately, it has been hesitating when I accelerate, not all the time but intermittently. It also shakes when I downshift, especially in lower gears. I have replaced the dog bone, the spark plugs, fuel filter, clean the MAF and tried another ignition coil. Nothing really worked. The only that worked a little (like a day) is when I disconnected the MAF sensor. I tried to do it again without much success. I scanned the car with VAG COM and I have no code.
The original clutch and original fuel pump are on the car. I checked the timing belt and it is in good shape. I was thinking that I may need a new clutch but I don't have nay slipping, just the vibrations when I downshift. I thought maybe the motor mounts are bad but I don't see excessive play when I rev up the engine. I sprayed the spark plug wires and ignition coil with water without any issues. What I should do next? Motor mounts or clutch? Bring it to VW for diagnosis?
I bought a cheap golf in february. It's an akl engine (1.6sr). Everything was fine on the way home. The car then wasn't used for like a month or two, and was stored outside. When we started using the car it gradually got more and more stuttering. At first it was just a slight stutter when accelerating, but now it's horrible. It will stutter and hesitate like crazy when accelerating or under load, but will cruise just fine at normal rpms. So far I have changed the air filter, fuel filter, spark plugs and a bad spark plug wire, but nothing has worked. I bought a vag scanner but couldn't find any codes. The idle isn't too bad but not perfect. What the problem can be?
View 10 RepliesI am going to be looking into this a little bit tomorrow with an oil change and noisy hub bearing.
Car : 2002 Jetta GLS 1.8t stock 5spd ~165k miles
Symptoms : Light acceleration (day to day), After shifting into 2nd gear, the rpms come down to 2-2500 range, while accelerating it feels like a hesitation for a couple seconds then continues to go without issue.
Moderate acceleration (casual hwy on ramp, stoplight fun), After shifting into 2nd gear, the rpms come down to the 25-2800 range, while accelerating it feels like a hesitation for a couple seconds then continues to go without issue.
Hard acceleration (short hwy on ramp), After shifting into 2nd gear, the rpms come down to the 28-3100 range. I do not feel any symptoms noted above.
The hesitation felt is enough to cause the car to feel like it had a short loss of power. This does give a jerky feel.
My thoughts : I know there were issues with the coils in this model/year. I have verified through the deal that the vin had received the replacements but unsure if they are the actual replacements. My dad thinks it may be turbo related (which is also stock and never pulled apart to my knowledge).
I found that this KO3s turbo should be fully spooled about 2200rpms. It seems to coincide with my lower rpm accel that maybe I am loosing some of the spool and feeling that?
Other Info : Am I way off or is there anything I can check for easily? I am not very knowledgeable in turbos beyond their basic functions. This is also my first turbo car. I have owned the car 2yrs now. It seemed to have always been there but I don't recall noticing it on the initial test drive. The trans has been replaced since noticing this for other reasons but did not correct this.