Golf IV / Jetta IV :: Losing Boost / Power At High RPMs In High Gear
2003 jetta gls 1.8t 5spd - gts stage 1 tune(gonzo stage 2)
tt 2-1/2" downpipe with high flow cat
turbo smart splitter valve(set to divert only)
turbo inlet pipe
homemade intake with k&n filter
stock n75 valve (f)
So in first through 3rd gear my car gets 20psi of boost then at 3,500 ish rpm smoothly starts to lower down to 15psi. but in forth and 5th gear the boost drops faster, enough so the diverter valve actually opens. then the boost will bounce up and down, around 15psi. the car still accelerates but with obvious power loss.
Is my diverter valve not "firm" enough? it is adjustable, so I've tightened it as much as it can. it doesn't seem to change anything. it came with spring spacers to make it tighter, but I haven't tried that yet.
Is it something with the tune? not enough fuel, need bigger injectors? The problem is only at about 100mph, so its not a big deal. I would like to get it straightened out if possible.
Camry :: RPMs Go As High As 3000 For A Couple Of Seconds And Then Drop To Normal On First Start Up
I've noticed on first start up the RPMs go as high as 3000 for a couple of seconds and then drop to normal even at 68' degrees,is that normal? because if it is what will aspect when the temperature drops to 20 or even lower.It is a 2.5 liter 4.
View 1 RepliesGolf IV / Jetta IV :: When Accelerate And Get Into High RPMs AC Vents Start To Blow Harder
My 2005 Jetta gli 220k miles just spurred going down the road now every time I accelerate and get into high Rpms the Ac vents start to blow harder and feels like loss of power. It's fines at idle and first gear but 2nd and up its does it I'm stumped....
View 2 RepliesGolf IV / Jetta IV :: Changed Battery Now Car Has No Boost And Slams Hard Between Gears
I have a 2004 jetta gls wagon with a 1.8t. the car ran just fine and had a tune running 16psi strong. I changed the battery in it and now the car wont boost, bogs out and SLAMS hard from gear to gear ( auto 5 speed ). I don't have vag com. I just need to get the car to drive with out it. Even if i get back to factory tune im ok with it.
View 8 RepliesGolf IV / Jetta IV :: Losing Power And Boost At 4k RPMs After Tuning
I have a 2002 gti with an apt software tune. Whenever I'm on the interstate in 5th gear for a while. And I'll start to speed up. Once 4k kicks in. My boost no longer works when it normally pushes like 22psi. Then after slowing down. No matter what gear I'm in. It limits back to 10psi of boost and once I hit 4k. It goes super slow and boost won't work. I'm not sure what else I should get to restore my car to perform fully.
I'm currently on the factory ko3 turbo and the previous owner had nitrous hookups and lines to the motor.
I'm already 3k into fixing it. Needed new shift cables and a fresh transmission
I'm hoping to push about 250hp maybe 300hp
The boost problem is fixed once I turn the car off and back on. I just want it to work again without having to spend an arm and leg on parts and labor. My mechanic works at Volkswagen dealership. But isn't allowed to work on my car due to dealership policies about working on vehicles older than 10 years old. The guy who tuned my car professionally at an apr shop told me that I should get a smoke test done (idk where or how to do that) for my vacuum lines and that I have a cylinder 4 misfire. It may be a bad coil or spark plug. But I'd like to get some performance out of my car and I don't know what else or where to start.
Golf IV / Jetta IV :: Losing Power And Boost At 4k RPMs After Tune
I have a 2002 gti with an apt software tune...
Whenever I'm on the interstate in 5th gear for a while. And I'll start to speed up. Once 4k kicks in. My boost no longer works when it normally pushes like 22psi
Then after slowing down. No matter what gear I'm in. It limits back to 10psi of boost and once I hit 4k. It goes super slowe and boost won't work
The guy told me that I should get a smoke test done (idk where or how to do that)for my vacuum lines and that I have a cylinder 4 misfire. It may be a bad coil or spark plug. But I'd like to get some performance out of my car and I don't know what else or where to start. I am new to this.
Golf IV / Jetta IV :: RPMs Jumping And Car Is Stalling
I have a 2001 vw jetta 2.0l manual. When the car is running the rpms jump up and Down from about 300 rpm to 900 rpm and I guess that's why the car will stall out every time I press the clutch to stop. Also the car won't run with the MAF plugged in. If the MAF is plugged in it will drive but will not idle the car will just stall.
View 16 RepliesCivic - Honda :: 1995 EX - Rough Idle / Stalling At Low RPMs And Won't Start When Humidity High
1995 Honda EX with 150,000 miles. Its been running rough ie rough idle, stalling at low rpms etc Additionally for awhile now when humidy reached north of 85% the car wont start. It cranks but rarely runs.
Took it to a mechanic last week for a tuneup. They replaced the Distributor cap, spark plug and wires and fuel filter. Car ran great for a day. Then progressively got worse. Was undriveable the other day stalling misfiring while at speed. Took it back today. They determined that it was still not getting spark and replaced the distributor. They did so, test drove it, declared it good and I came to pick it up. Paid the bill, walked out to the car and the damn thing would not start. Humidity was high.
Mechanic pulled a spark plug and put a tester in and didn't get a spark when cranking. He is assuming the distributor he just put in is bad. So they are keeping the car overnight to be fixed in the morning with a new distributor.
However I'm not convinced the dizzy is bad, I believe, as I've read that the Honda's ECU is probably bad and shorting out in the high humidity. Can a bad ECU would prevent spark?
Golf IV / Jetta IV :: High Pitched Noise While Under Boost
I'm having a strange, very high-pitched, noise that seems to be coming from my turbo or (possibly) somewhere else in the engine bay. It sounds very screechy, and it may be paranoia, but I believe it also may have a slight metallic sound to it.
It all started yesterday after changing the thermostat housing for the third time in 2 days (autozone sold me a faulty, warped, housing that leaked after install). During this repair the engine never overheated (it did however leak fluid and go a little low) and the main point for replacement was a stuck thermostat. After finally getting it fixed I took it for a test drive and noticed the horrid noise after hitting a good amount of boost (no gauge installed). The noise occurs when boosting and doesn't happen when spooling in the 3k-4k range. I had no hint of the noise before this.
There doesn't seem to be any drop in performance and it still pulls hard. Hoping this to be a loose exhaust connection or boost leak. May be spooling sound escaping.
Mods:
- short ram air intake with an aem filter
- 3" turbo-back exhausted
- revo chipped
- 4 bar fpr
Golf IV / Jetta IV :: 1.8t - Bogged Down And Misfiring When Go Into High Boost
I'm having a misfire issue on my 1.8t. When I go into high boost I'm getting bogged down and misfiring.
I plugged in my obd2 adapter and it gave me a misfire on cylinder 3. I since cleared the code to try and see if it was a coil pack by switching it to another cylinder, but now the cel won't come back on although the problem persists.
I have recently changed the plugs and the car was fine. I then added a fuel injector treatment and the misfire started shortly afterwards. (coincidence perhaps). It's frustrating as I can't rule out coil packs as my cel won't come back on and my code reader is not displaying any faults.
I did previously have a cel with something about fuel trim bank 3? I am also sure I have a boost leak as the car whistles pretty loud under boost.
Also worth mentioning I have a bit of white smoke sometimes but I'm not using oil or coolant and they are not mixing either. I'm at the end of my tether with this car and just want to try get it back to normal.
Honda - Odyssey :: 2001 - Car Goes Into High RPMs (about 3000) Before It Seems To Drop Into Gear
I had my Honda Odyssey transmission replaced 2 years ago. The past few months, in the first mile that I drive the car on streets in our neighborhood, the car goes into high RPMs (about 3000) before it seems to drop into gear. It does this 2 or 3 times then works fine after that. The "Check engine" light is now on all the time. Sometimes, the car does one other weird thing--the high RPMs end with the drive/D4 light flashing on and off like a blinker (even if I change gears to D3. When this happens, if I turn the ignition off it comes back on and seems to function fine. I have had it back to the shop that did the work about 4-5 times to get it right. I like the guys but each time they return it to me, the problem remains. I took a 2000 mile trip with it and with the exception of this persistent problem, the van worked fine.
View 2 RepliesFord Escape / Hybrid :: 2003 - High Idle / RPMs Shoot Up To About 3000
When I start my 2003 Escape 3.0, the rpm's shoot up to about 3000rpms. After a few seconds they drop to about 2000 and slowly creep back up to 3000. When I put in gear, I don't even have to step on the gas and my vehicle goes. It maintains between 1500-2000rpms as I'm driving. When I come to a red light or stop sign, it lurches like it wants to go even though I have my foot on the brakes. I've replaced the IAC valve, TPS, had it checked for vacuum leaks, PCV valve replaced. I'm at a loss as to what it could be.
View 3 RepliesGolf IV / Jetta IV :: 2002 Running At Insanely High RPMs On The Highway
I don't own a VW, but my friend does, and she knows absolutely nothing about cars. She drove me home from a friend's house today, and I noticed her car was sitting at insanely high RPMs, even though we were only going like 60-65. The car was ranging from like 4500-5200rpms the entire way home, and the engine sounded like a lawn mower.
Don't know many details on the exact model of 2002 jetta it is (I'm a subaru guy) but it's an Auto. I was convinced she had it in 3rd the entire way instead of drive. I asked and she said it was in drive, but I was sitting in the back so I couldn't quite tell. Not sure how being in 3rd works on an automatic, but she could still come to a full stop. The car was pretty much constantly sitting at above 3k whenever it wasn't at a full stop though. Like, after letting of the brake at a stop light, and pressing the gas, it'd pretty much immediately flick up to 3k and never go below.
So, not sure if this is normal for these cars, but I thought it'd be worth asking since it would suck for her if this could have been fixed earlier. My subaru sits at 3k when I hit 60, and only hits 4k if I'm going like 80, so I just thought this seemed pretty weird.
Golf IV / Jetta IV :: No Start - Random Misfire / Stalling And Bad MPG
Well first the exact car I have. 99.5 Jetta 2.0 AEG. It all started with one loud backfire with a stall at a stop light while in neutral. After that it was random stalling and jerking while driving. So I checked my everything and all seemed well. I replaced spark plugs because they where fouled and nasty. Cables are good. They're near new and tested them with a multimeter. Next I checked my injectors and they are surprisingly very clean.
I had also ran seafoam prior to these problems a few weeks before it all started. Next step was new fuel filter. Old one was nasty and black stuff dripped out. That didn't work. So I checked for vacuum leaks with throttle body cleaner. Nothing. Visually threre is nothing wrong under the hood. So today I changed the fuel pump. Went for a test drive all seemed well. Can out of the bank. Then it won't start. So I wait like normally. And it normally gets me home. Nothing. Will sometimes start but if I'm not holding the gas it dies. I don't know what to do. My only other thing I can think of is the coil pack.
Golf/GTI VII :: Buzzing Sound Around 2300 - 3000 Rpms Mostly During Deceleration
Manual... I hear this buzzing sound, mostly during deceleration, on 2nd, 3rd or 4th gears between 2300-3000rpms, very annoying on 2nd and 3rd gears, but can still somewhat noticeable on 4th gear. Can also hear it on acceleration, sometimes on 2nd and 3rd gear, silent on 4th gear.
I've turned off soundaktor thru VCDS, but still hearing this sound so I was thinking that the hockey puck is still spinning, albeit not as annoying as when it's 100%. So I tried to disconnect it, still hearing that buzzing sound. I even removed all stuff from my car and it's still buzzing. Really annoying, specially if you just want to hear the sound of the engine braking on deceleration.
Golf IV R32 :: Surging At 3000 RPMs And Intermittent Power Levels
Ok so a little back story, I have CEL codes 17748 & 17755 which basically tell me that I have a stretched timing chain. That being said, others say they have the same codes and their car runs like a champ and makes full power. Not sure the truth to that but whatever. Regardless, I don't know how a stretched chain would cause a sudden surge of power at certain rpm, but I do not know the ins and outs of this engine and ECU.
So, for some reason my car feels fine when driving around at low rpms, but when I take it above 3000 rpm or so with mild throttle, it feels a little weak. Now if I am giving it moderate throttle, once I hit the 3000 rpm range, all of the sudden I can hear my intake get louder and there is a sudden surge of power. Furthermore, it feels to me like as the rpms get higher, like over 4500-5000 range, the car feels pretty weak. I am not sure how the car should feel though because this problem has been like this since I bought it. I am pretty sure it's not making full power though.
I can see how stretched chains could lead to being out of timing which could mean low power up top, even though I don't know why the variable cam gears couldn't make up for this.. but what's up with this power surge thing?
Corolla :: 1996 DX Stay Stuck At High RPMs Without Changing Gears
I own a 1996 Corolla DX with an auto transmission which has a few issues I would like to fix. The biggest issue is that sometimes it stays stuck at high RPMs (somewhere near 3,100) without changing gears which makes me have to give it some extra torque momentarily to change gear and drive at normal RPMs. But sometimes it does the opposite, when slowing down it sometimes stays at a higher gear and won't change to a lower gear until I've slowed down almost to a stop.
Another issue is that it is very slow to accelerate, it just feels real heavy and I regularly have to give it a lot of torque just to be at equal speed with the rest of the cars on the road, does this have a fix? Other than that there isn't any major issue that I actually know about, for this reason I'd like to know what place you would recommend me taking my car to get a full checkup to find any issues I don't know about.
Golf/GTI VII :: Clanking Sound On Boost In Higher Gears
I noticed this sound on Thursday, I couldn't replicate the issue at first, but it's getting worse. I can now replicate it almost any time I get into boost in a higher gear (4th, 5th mainly). Partial throttle, usually starts around 3,000 RPMs. Can't quite tell where it's coming from, but it's a bit concerning. I've got 16,000 miles on it with no mods (DSG gti). It'll be going to the dealer next week for sure, but what it could be? Kind of afraid to be driving it, but my dealer is closed until Monday and I wont be able to get over there until the afternoon.
Sound starts at about 6 seconds into the video (it's quiet, but you can hear it well if your volume is up), turbo starts spooling up at about 4 seconds. The car has a slight hesitation when the noise happens, but it's not violent. No CEL.
Ford 7.3L Power Stroke (1999-2003) :: Waste Gate Supposed To Work At High RPMs / Boost?
I understand how the waste gate is supposed to work at high rpms / boost.
I believe that as long as I keep the max boost down, that I can run with the waste gate plugged in order to goose the power a little in the 2000-28000 RPM range. Since the truck is stock and there's no intention of running higher RPMs, it seems like plugging the waste gate is a good idea. I just want to make sure that I'm not missing something.
It appears that the wast gate also opens when at idle and possibly when you let off the throttle. Are these important functions of the waste gate as well?
Here's a chart showing waste gate operation...