Golf IV / Jetta IV :: 2002 GTI Does Not Go To Full Boost Until Re-accelerate
I have a stage 2 2002 GTI with 135k & I'm having an issue once in a while where if I go WOT the car will only boost up to about 5 (around there, don't remember) psi but if I let go and accelerate again, it'll boost normally again.
No lights or CEL comes on when it happens though. I tried searching for any info but not sure what direction to look at. I have a stock K03S, Forge DV, 3" Turboback, Short Ram Intake, FMIC. Bad N75 or DV?
Golf IV / Jetta IV :: 2001 1.8t Not Getting Full Boost / Vacuum Leak?
Ever since I got my car about 5/6 months ago I noticed it's not getting full boost. when I first got it the stock boost was getting about 5-7 I don't know if that's normal I've read they normally get more. eventually I got my car tuned and it's supposed to peak at 22 psi but it only got to about 13-14 psi. slowly it's been getting worse and my car is getting 2 psi. I've had lots of people tell me it's a vacuum leak. also the bov makes a flutter noise if that has anything to do with it. my intake doesn't make a sucking in noise like most do. The car has been randomly backfiring usually between gears. I just ordered a turbo inlet pipe a breather hose kit and a boost hose kit.
View 4 RepliesGolf IV / Jetta IV :: 2002 - Stutters / Backfires And Eventually Drops To 5 Psi At Full Boost
The car is an 02 gti. I am having problems at full boost(17 psi) where the car starts to stutter, backfire, and eventually drops to 5 psi. Throttle up to 15 psi is always smooth and there is no hesitation or misfires. It's chipped but I am unaware of which software as it was already on the car when purchased.
What I've done:
Checked for any leaks - none
Cleaned maf
Replaced plugs(0.028) and coils which was needed anyways
Coil harnesses look good
Fuel filter changed
I've read about the n75 but I am not experiencing any surge issues that many have described. I do believe the car is running a little rich because I can smell some fumes but it is very light. Car fires up just fine and idles smoothly.
Golf VI R :: High Pitch Screech In Boost And While Letting Off Gas
The symptoms are as follows.
-No change in performance, functionality, or spooling.
-Loud intermittent screeching noise when building boost above 3500 RPM
-Can only describe the sound as air escaping from a tiny hole, VERY similar to warn brakes, that kind of screech. The intermittent part I would describe as if you were tapping your brakes (and they were screeching) rapidly, so on off on off very quickly.
-Also happens when I let my foot off the gas (Also above 3500 RPM)
-Car has CTS Turbo Intake, 42DD Downpipe, and APR stage 2 software.
Golf/GTI VI :: Loud Squeal Or Screech When First Engage The Clutch
I've been experiencing a loud clutch squeal or screech when I first engage the clutch after the car has been sitting for longer periods of time, overnight etc. It goes away after a few shifts and only returns after the car sits for a long period.
I brought it to the VW dealership since I'm still under warranty for a bit. After two visits the have come up with two hypotheses without any evidence. They claim to have not heard it or found anything wrong visually.
1) it could be a rear main seal leak. Or leak from somewhere on the tranny onto the cultch. When I first drive it is burned or wiped away. After putting on the lift they found no evidence of leaks. So hypothesis two:
2) Thy flywheel may be developing a bit of a patina of rust. After the clutch is engaged a few times, the rust is gone and the squeal goes away.
Golf VI R :: Metal Clattering Noise In First And Second Gear From About 2K To Full Boost
Recently purchased a brand new 2013 R. With ZERO mods on it and 5,000 miles, I flashed the car to UM Stage 1. Immediately after flash I get a noise that sounds like a metal clattering in first and second gear from about 2K to full boost. Happens most audibly when the car is cold but is subtly ever present when heated up.
When the noise occurs I feel as if I'm getting half boost or a very inconsistent boost curve. The boost then kicks in after the 3,500k(ish) threshold. On rare occasions, the car will warm up and run exactly as I would expect it too. 1st, 2nd, 3rd all boost very evenly and strong from 0k and beyond with no noise and the car is amazing to drive.
To try and diagnose the issue, I flashed it back to stock and the noise disappears though I can still feel it not boosting consistently. I took it to the dealer (stock) and they said the didn't notice or couldn't hear anything which was what I expected. I'm guessing it is something the with wastegate but I don't know enough to say with any confidence.
Golf/GTI VI :: Gauge Not Reading Full Boost After VF Intake Install
I installed a VF intake a few weeks back and noticed my car is peaking at around 14-15 PSI max according to my boost gauge, when it used to hit 17 peak. I'm not sure if I may have a leak nor have I checked it via vag-com.
It does feel a bit off, but for as far as I know the gauge could be messed up now.
Just wondering if there would be any immediate signs (sounds etc...) of whether there would be a leak, or what other problems may cause this.
Golf VI R :: Inconsistent Power - Low Fluttering Sound Under Full Boost
Ok here is my question. I've noticed the power on my car has felt inconsistant for the last little while. I finally got around to logging the car and my boost peaks at mid 20's just over 3000 RPM and then drops fast to between 13-15 psi before I even get to 5000 RPM.
Under full boost I hear a low fluttering sound like the diverter valve opening and closing when this is happening. I also don't get the typical diverter valve sound when shifting when the car is doing this.
I took my diverter valve out and inspected it. I can pushing the piston up very easily with almost no resistance, is that normal? I would think that it should be hard to push the piston up if not wouldn't boost pressure be able to overcome the piston and leak past?
My mods are. HPA tune, HPA catted down pipe, and VWR intake.
Prius (Gen 3) :: Brake Noise (Loud Screech) While Backing Up
Our brakes sends out a loud screech but only while it's backing up. (78k miles)
Is it time to change the pads?
Should we service the brakes at the dealership or private auto shop?
Elantra XD (2001-06) :: While Shutting Down Car Makes Loud Screech
From the time I start the car till I shut her down I hear this loud screech. I thought belts but they are not the cause! 2001 elantra 5 speed transmission ...
View 3 RepliesHyundai - Sonata :: 2009 - Loud Screech Upon Startup?
I have a 2009 Hyundai Sonata which gets a sporadic high screech upon startup. I associate this sound the key left in the ignition after the car has already turned over. It will go away as soon as I shift into drive. Is this the problem with the ignition switch or starter? How difficult is this to diagnose as it only happens on occasion? Assuming it's the ignition switch, might I be damaging the starter if it continues?
View 19 RepliesGolf/GTI VI :: Loud Turbo Whoosh Noise - Boost Leak?
2012 TDI ... OK so out of nowhere, my car is making loud turbo whoosh noise, while I love the way it sounds, it's not normal or intentional, so I don't like it lol. I have an AWE intake, and a gutted turbo resonance damper. Is been fine and same sound ever since those mods but now out of nowhere it is really loud with the whooshing of the turbo.
Small video of it... [URL] ....
Pictures of turbo area .....
Anything look wrong? I circled that one area but wouldn't know if that's normal or not....
GTI 337/20th Anniversary :: Screech Loud Enough When Slightly Touch Brakes In Reverse
Every time I slightly touch my brakes while in reverse, they screech loud enough to wake a whole neighborhood. Did I purchase wrong set of pads or is this common, ive asked around and no one can figure it out. It only happens while I press them in reverse...
View 3 RepliesGolf VI R :: Loud Hissing Noise From Passenger Side / Boost Won't Go Over 24lbs
So for the last 2 days I heard this loud hissing noise from the passenger side of the car and also noticed that my boost won't go over 24lbs. So I called my local tuner shop Innovative motor sport in Stratford and was told to bring it down to check it out. Less then an hr later I was at the shop and we where putting it up on the ramps to get under to take a look. I took out the panel covering under the motor and looked up to find a hole in my turbo outlet coupler. Tom at IMS had an extra laying around and let me use it till I get a replacement.
View 10 RepliesFord Ranger / B-Series :: Loud Screech / Grind - Transmission Locked In 5th Gear
Last night, on my way home, I suffered a catastrophic transmission failure in my 1991 2.3L 5 speed. Stepped on the clutch on an exit ramp from the freeway and was rewarded by a LOUD screech/grind, a stopped vehicle, and a transmission "locked" in 5th gear. The local HERO service pushed me out of traffic and I got towed home. Looks like a transmission transplant is in my immediate future. So - the question is, what year manual transmissions match up to a 1991 2.3L 4 cylinder, standard cab, 2WD? I need to start searching salvage yards.
View 3 RepliesGolf IV / Jetta IV :: Won't Boost Past 4 Lbs?
my car into VAG COM and since then it hasn't boosted past 4 lbs. it has Revo stg 2, K04, aftermarket side mount, full exhaust and a couple other bolt ons. Before the car was spiking at around 23/24 lbs. after pressure testing the system I found that the turbo inlet pipe was lose, so I tightened it. Still no change. I tried holding the battery terminals together for 10 minutes to reset the ecu and I also tried clearing the codes through a handheld code reader. No codes even come up anyways for this. The car is a 1.8T.
View 4 RepliesGolf IV / Jetta IV :: Car Loses Boost Throughout The Rev Range
So my 2001 1.8t Golf is having some issues holding boost. I have a Gonzo stage 2 tune, CTS FMIC, Forge 008 Diverter, Silicone inlet and MagnaFlow Exhaust. I've also done the whole Evap, SAI delete and installed a catch can.
Starting in 2nd or 3rd at WOT the car spikes up to 18psi and then progressively loses boost throughout the rev range. Close to redline the boost drops to 5 psi or so. It seems to be dependent on the revs. In fifth gear the car holds 18 psi much longer as the revs don't increase as fast.
There are no CELs. I've done multiple leak tests starting at the air box and plugging the pcv/catch can system as well as at the compressor side of the turbo. None of the tests revealed a leak anywhere in the intake system. However, when I stuck my ear very close to the valve cover I could hear what sounded like a very small air leak coming from inside the valve cover. I took a look at the wastegate actuator and it seemed fine, no play in the rod, no loose bolts and to move it just requires enough force to compress the spring and it returned to its original position.
My thoughts are that it could be a fueling issue or turbo in the process of dying maybe.
Golf IV / Jetta IV :: Slight Drop In Boost
Just noticed today that I have a slight drop in boost. Normal boost is 1.5 bar but today it is running slightly lower boost and does not have the same pull through all the gears.
2001 mk4 1.9 tdi golf
Golf IV / Jetta IV :: Whistling Noise When Hit Boost
I just recently notice a whistling noise when I hit boost. I'm not sure but it sounds like it is coming from my gauge. I'm not losing boost pressure. I do have a glow shift gauge. The most recent install was the TIP which I clamped on to the turbo but I'm wondering if it isn't on tight enough.
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