Golf IV / Jetta IV :: Shuddering Only On Hard(er) Acceleration
May 22, 2016
1.8T ... Well, initially, engine light came on with a violent shake from the engine compartment. It was really really bad. I thought the engine mount just broke off or something...
First I looked at the coil packs and the spark plugs. The spark plugs were pretty old (I got the 02 Jetta 1.8T at ~140k miles for 1k, so no surprises). Spark plug on cylinder 2 was real bad, and that was the cylinder with the misfire code. Got a new set of spark plugs first. It worked a lot and the violent shuddering mostly went away.
The engine still idled erratically jumping and dipping at idle, even with the A/C off. So I replaced the coil pack on cylinder 2 after doing the coil pack switch test... After replacing the one coil pack, the engine idles like like it's new.
When I put the car in neutral and rev the engine to the redline, it revs nicely, very smooth. When I drive the car, when I accelerate reasonably slowly with the traffic, the car drives just fine. If I keep the car in lower gears and use light throttle to accelerate, it is smooth even past the rpm range where the turbo would be spooled up.
It is only when I dip into the throttle a bit more (no where near full throttle) to try to pass a car or accelerate just a bit harder, a little past ~2200rpm ish which is when the turbo starts spooling from the sound of it, it starts shuddering badly, and check engine light comes back on. The code shows misfire in cylinder 2.
My guess is there's something off with fuel system. My non-mechanic thought process is that maybe the injector is clogged and when it's light throttle, light acceleration, it injects little fuel and its ok, but when under heavier load / throttle, it tries to inject more fuel, but can't because it's clogged...
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I just recently bought a 2001 Jetta with the 1.8t (AWD) because it had low mileage and a reasonable price. I've never owned a VW before so I know very little about them in general. This is my second vehicle with a turbo, my first was a Saab 93.
When I purchased the car it had the check engine light on and the codes were Vehicle Speed Sensor and Secondary Air Injection Pump. I was able to get it to stop throwing those codes just by cleaning off the components and reconnecting them. The only predominant problem I've been experiencing is that under hard acceleration in 3rd-5th the car will jump and jerk. Its almost like the car isn't getting enough fuel/air but I'm not entirely sure if that's an accurate diagnosis. I've ruled out transmission issues because there are no problems when driving at a slow-normal acceleration. Any insight on where I should begin to fix this issue would be welcomed because I feel as if my motor mounts will break due the force of the jerking.
My last issue has to do with what happened yesterday. My check engine light came back on randomly when I cranked my car. I had no issues the previous day (besides the aforementioned "jerking) so it seemed odd but what really worried me was when I started driving. Whenever I would release the accelerator the car would slow down suddenly as if I applied the brake. The problem continued throughout the day until I got the codes checked and they read Vehicle Speed Sensor (which I've seen has numerous issues from the factory installation) and the Bank 1 O2 sensor. Today I started my car and the check engine light wasn't on.
My car drove like normal (still the hard acceleration jerking but no dramatic deceleration when I release the accelerator). Now to my question, can an O2 sensor cause a problem like this? Maybe the MAF is bad? Not even sure if this vehicle will throw a code for the MAF ...
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2002 AVH Jetta Wagon. When I got the car back in 2012 it had 121K and I changed the wires (ngk blue 57021) and plugs (ngk platinum) and she drove like a dream. A couple of months later I started having issues with wet weather and moisture causing misfires so I did the JB WELD fix and though I'd still get the occasional misfire in hard rains it lasted me pretty much until very recently, when I decided I needed to put in a new coil because the problem was getting worse (hardly starting up after a rain and bucking wildly till things dried out). Yesterday, I replaced the BERU with a new HUCO and the car started up fine and drove fine all day. I think there was a lot of moisture in the air last night and possibly some rain but this morning, SAME PROBLEM with a new coil. Misfiring like crazy, no acceleration.
I thought the NGK wires and plugs I got were rated to last beyond 20,000 miles. At this point should I assume the wires are to blame? Split somewhere or something? It's definitely related to water and the electrical system.
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I have a 2003 Volkswagen Golf 2.0L 5 speed manual. Over the last 10,000 miles a problem started where on the highway in 5th gear, if i try to speed up by putting the pedal down, the steering wheel moves itself to the left and the car steers to the left. The wheel returns to the original position when i let off of the gas. its scary at high speeds and has become so bad that I can feel it accelerating at low speeds too.
The alignment is off and the steering wheel slightly to the right. when I put the gas down and it goes perfectly straight and when i release it goes back to the right. it has 126,000 miles on it. I know it needs tires, shocks and an alignment job but don't think that those factors are causing my problem. Could it be the motor mounts?
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I bought a MK4 GLS 2.0 5 spd with 200,000km on it back in february, It currently has 208,000km on it.
Whenever I drive in reverse, I get this loud shuddering/rattling noise with a slight vibration. I've noticed that it is louder from a stop and when the clutch it partially depressed accelerating,but pretty much goes away when the clutch is let out or when coasting.
It is sounds like it is coming from behind the front seats to the rear of the car. It almost sounds like the rear shock mounts are rattling. I also sometimes still here a slight knock, similar to the sound of worn sway bar bushings, but replaced those a few weeks ago.
I also get the same knock whenever I screw up a shift and the engine moves. I also considered and engine or transmission mount but i don't really get any vibration through the steering wheel other than a small amount which could be attributed to the poly dog bone bushings.
About two months ago but I replaced the RR shock mount with a new one. The old one looked fine. I replaced the RL shock mount with the one that I removed from the RR side.
Changing the shock mounts made no difference but I noticed that I could easily compress the RL rear shock with my hand. Could worn rear shocks be causing this noise/vibration? I've searched but I can't find an explanation besides the shock mounts.
I have replaced a few suspension components in the last few months:
-rear beam bushings in august
-front sway bar bushings a few weeks ago
-RR rear shock mount (new)
-RL rear shock mount (used from other side, but looked fine and replacing it made no difference)
-energy suspension poly dog bone bushings about six months ago
I don't think the car was really maintained that well due to it having original sway bar bushings and having tires that were worn very unevenly due to the rear beam bushings when I got it.
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I'm a broke grad student with a 1995 Jetta. I've had it about four years, and it's mostly been all right. Granted, it's mostly held together with luck at this point--my dad's a former mechanic, and he did a fair bit of work on it before I moved a thousand miles away. The other day on my way to work, the car started bucking and shuddering, especially when I first started moving. I was very nearly out of gas, and I thought that might be the problem. I put some in and things got almost totally better almost immediately. Tonight, the car tries to start, but it won't catch. My dad thinks I have water in my tank. Would that do this?
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I have a 2010 Prius Pkg 5 with around 71xxx miles. I usually drive it like a regular car on eco mode and get around 38mpg average but recently I've changed my style of driving where I accelerate to the desired speed limit, let go of the gas, then reapply and keep the mpg meter in between the middle eco line and before the pwr band. I've been able to average 44mpg this way, which is great!
However, what I've begin to notice now is that say if I'm traveling at say around 45mph and let go of the gas and re-apply, the engine starts to shudder as if it's not getting enough gas. Why this is happening? I also need new tires (215/45/17) but that doesn't have anything to do with this. I've owned this car since 30xxx miles and haven't done anything other than put gas and change the oil at the dealerships. Could putting 87 octane gas with up to10% ethanol have any effect on this?
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I have 2015 GTI PP which had the APR Stage 2 with downpipe done about two weeks ago. I pretty much babied it the first week and couldn't believe how quick the car felt with a tiny little bit of throttle.
However, when I floor the car, it accelerates slower than if the throttle is slowly pressed to the floor. If I floor it and then back slowly back off the throttle as I near the upper RPMs the car starts to accelerate like it should have in the first place. The car is a total rocket if I slowly press the pedal towards the floor but if I press the pedal to much towards the floor the car slows down its acceleration that is until I start to slowly lift the pedal.
I'm at 5000ft elevation and its been pretty hot in the 80-103 F degrees. The gas out here is only 91 octane and the car has the 91 octane tune. I have tried gas from multiple stations and even tried an octane booster with no noticible improvement. I went to go log the car with my VCDS and found out that this new car uses a UDS ECU and none of the APR codes on their site match up.
Looking for a compiled list of UDS codes that actually log something useful? Or have a list that corresponds to the APR list of codes?
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I purchased a 2001 Subaru Forester about 4 years ago. Within 48 hours of buying it from a dealer, the check engine light came on showing the PO420 code. The car was running fine without any problems and it was suggested to us by 2 independent mechanics that Subaru is notorious for throwing this code, so we didn't investigate it any farther besides doing a fuel system clean/flush that was offered to us by the dealer.
Lately, the car has started sort of shuddering during acceleration so we figure it's time to look into this more, but just trying to figure out where to start. From what I understand, this model has 2 catalytic converters and 2-3 O2 sensors. I've been reading as much as I can on the topic and watching videos trying to figure out our options and whether we should try replacing the O2 sensors first or just go for replacing the whole shebang. I know we cannot afford the pricey repair of it all right now so the car will have to sit for quite some time before we can do that; however, if we can figure out how to do it ourselves, we could get it done much sooner.
My questions are:What is the likelihood that this could still be an O2 sensor issue considering the shuddering when accelerating?
What other signs do I look for besides rattling in the cats to know they might be bad?
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My GTI knocks everytime i acceletate hard from a full stop. The car is chipped stage 1+ from unitronic, apr intake. Everything else is stock, 80.000 km. the sound comes from the front right wheel. I believe it is a top plate, but I'm not too sure.
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I am getting a ticking noise under hard acceleration. Dealer told me the exhaust is touching the heat shield but did nothing about it. It's driving me crazy...
I may have to pull the trigger on this Borla I found for 700 shipped and new. Trying to keep my promise to myself to drive the car stock for a year b4 any major spending. That's out, I can already tell.
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I recently changed out my stock clutch for a SB Stg.2 endurance clutch. Under hard acceleration my car has developed a serious vibration. I had all four tires road forced balanced but this did nothing. It almost feels as if I have a bent wheel but had no issues prior to the install.
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I've had this happen a couple of times before on my '10 GTI - I'm on the freeway and I decide to throw the DSG into S mode and punch it, seconds after I bring it back down to D and normal engine speeds I can smell an odor that reminds me of the cat going bad - sort of like sulfur or something burning (not rubber, though). This is with my windows rolled up and A/C re-circulation turned on. What I should be checking?
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Over the past few months I've noticed that my truck has a very intermittent shudder under mild acceleration. If I accelerated more during the shudder it seemed to disappear until I let off the peddle a little. When it happens the truck doesn't seem to be lacking power and the engine throws no codes. It happened again today right as I had stopped at a red light. I noticed that it was shuddering at idle too. I shut the truck off at the intersection and the shudder was gone once restarted. What it may be?
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I took delivery of my GTI last Friday and I'm loving the car so far. Coming from a 2001 Miata LS, this car is so much smoother and quiet. I especially love the engine and the sound it makes, or lack thereof. It's barely noticeable until I stomp on the gas and then there's a lovely ... growl? rumble? I'm trying to think of how to describe the sound to friends who cannot hear it firsthand.
BTW, I haven't noticed the dreaded turbo wastegate rattle between 2-3K RPMs so, no, it's not that.
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Lately I've been having trouble with my car in third gear under hard acceleration while in tip mode with DSG. I have been Stage 2 since April and it hasn't really been an issue until recently.
The best way I can describe it is when you get into 3rd with your foot on the gas the car stops accelerating and kind of gets stuck. I have to completely let off the gas and before it "wakes up" again. I feel like it's been getting worse in worse, but it only ever happens when I try to push it hard.
No problems in auto mode or sport, it's just a major let down. Could the fuel pump be the culprit? It just feels like the car doesn't want to move for a second or 2, like no response from the gas pedal.
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Recently the car was stuttering under hard acceleration and battery voltage dropped, I have a batt gauge. Got harness replaced and symptoms are gone but this must be happening to others with or without symptoms.
Check your fuse box on top of the battery. The alternator harness wire turns silver after many years of use. Your battery volts will drop also and you can see it with a gauge. I changed this harness and symptoms went away. It's the thick gauge wire all the way to the left. This needs to be changed with a new alternator. Many people prob don't know their harness is causing high resistance affecting the quality of smoothness.
The hotter the car gets the worse it gets if you have this issue. More RPMS, is more electricity and more resistance. There is no CEL for this. The harness should be copper colored, if it turns silver it's old and needs to be swapped. If you drive low Rpms all the time you won't notice. But it's an R, who does this?
The harness is around $90 and car has to be in service mode to get to the alternator. This is my 2nd alternator and kept my original harness when replaced, bad idea.
It takes under 20 seconds to pop the hood and open the fuse box to see what color your harness cable is. I expect most to be silver not copper, but whether you have symptoms or not depends on severity.
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The problem started with a slight hesitation around 2500 under hard acceleration. Then it became more pronounced from 2 to 3.5k. The CEL would blink when it happened for more than a few seconds. Eventually the CEL stayed on. Now the car idles roughly with a periodic thump feeling, and any time a load is put on the engine, it feels very rough. I don't have VAG-COM, so I don't have any codes.
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Got an odd clunk, feels like rear off throttle from hard acceleration. Feels like diff bushings might be worn. Looking for some info about diff bushings and how they feel. Also found the front prop shaft coupler looks like its seen much better days so ill be replacing that.
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Having problems where sometimes the car won't go into gear, other times it's fine? The problem started after some hard acceleration in 3rd, there was what felt like a momentary loss in power. I dipped the clutch as I thought a boost pipe had popped off, all was fine (still seeing boost when revved). After this it got progressively harder to get gears, finally resulting in not being able to get into gear at all.
I found I could get it into 1st with the engine off and could go up gears normally, but couldn't change down without stopping and turning the engine off. The clutch is working fine, the biting point is normal. The problem seams to come and go randomly, it will work fine for a while and then start playing up again. When working the gearbox feels normal, there is no grinding or wining noises. I can move between gears normally and do clutch less gear changes.
There is now a vibration which can be felt at 1000rpm when stationary. It feels like it coming from the engine/gearbox and seems like something is out of balance as it shakes the whole car. The car is on 91k, supercharged running 470hp & 370lb/ft (at flywheel) and is fitted with a Spec stage 3+ clutch and solid flywheel.
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My new to me 04 4.6 shuddered and misfired really bad last week, got couple misfire codes. I changed plugs which were really bad, like burnt out to .080, got a HEI ignition tester and got a healthy spark from all the coil packs. Drove it today and ran much better but still would shudder under acceleration when cold, wasn't as bad when warmed up but still noticeable. I thought if I got a spark with the tester that means the coil is ok? or is that not the last word in coil health. Or should I look somewhere else like injectors ? Haven't got any codes since plug change.
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