My boost gauge is bouncing around during the flutter at peak psi? I have a apr stg 2 evoms intake and full tbe exhaust 42dd...
Here is a exact video of the flutter i am talking about [URL] ....
So I'm wondering in a nutshell; in layman's terms... what is compression surge and turbo flutter if you had to summarize it in a few sentences. I was told that its worse with a tune, but even our stock cars have it? I'm not very tech savvy so on the articles I found and read it's said to be bad and basically happening at low RPM on high gears?
View 6 RepliesI have an 03 GTI 1.8t with the stock K03s turbo and i used to boost to 25 pounds. Had to put a new motor in and now i when i boost above 20 pounds i get turbo flutter and loose boost. I can boost anywhere up to 20 pounds and the turbo doesn't flutter at all.
I had a spring on my waste gate which i have taken off and it changed nothing. I tried a different diverter valve and it didn't change anything. I unplugged the MAF to see if the N75 or the there was a boost leak and extra air wasn't being monitored but still changed nothing. It has nothing to do with my RPM range just when i boost over 20 pounds. I am planning on doing a leak down test to make sure there isnt a boost leak....
Replaced my coil packs/sparks, and just got around to changing my N75 valve today. The rough idle issue is gone but now when I go WOT it boosts but goes from 15psi-12-13-12-14-12...etc. I've checked and there are no boost leaks. I do have a CEL saying I need a new bank 1 sensor 1 Oxygen sensor. If it is that, why did this problem arise as soon as I changed the N75 valve and wasn't present earlier?
View 1 RepliesI have a 2000 Jetta 1.8t. I am having a sudden boost surge problem. It seems no matter what gear I am in if I get on the gas when getting on the highway or whatever to just get up to speed in a reasonable amount of time, the boost just increases like crazy. I do have Gonzo Tune and know I should have a faster response but I have been in higher built mk4's and they don't do this.
I have done the following to try and fix problem and some cause it was just time to replace:
New MAF
New N75
Fixed Leaks
New Plugs
New coil packs
New Fuel Filter
I do have a boost gauge and when cruising my vac is steady. The sudden surge of boost goes to almost 20 psi. I have thought of replacing my wastegate actuator since I have heard that can be a problem?
So Im going to post a series of graphs of boost compared to rpms. I also did fueling and wastegate. Im having an issue with alot of boost flutter and sluggishness
Idle lambda is at -1.3
Partial lambda is at 13.5
Graph one showing specified and actual boost compared to rpm
Got rid of the crappy autozone special sunpro boost gauge and installed the newsouth that bill shipped me.
Only getting -10 vac at idle
Spiking and holding around 24-25 psi and then it barely drops at all but it holds at 24psi for a while which is kind of scary....
I'm to the point of driving the car off a cliff! I've included a log of the car acting upt. The car is a 20th AE GTI AWP. It was chipped all it's life and ran like a champ. In November I installed a Frankenturbo F21T turbo kit, Bosch EV14 550cc injectors, 3" MAF, eBay FMIC, 3" catted exhaust, and a custom tune from Motoza. Dave at Motoza has updated the file 4 times and no matter what he changes, the car will boost up to the requested boost of 19psi and hold it for almost one second, then boost will drop to 12-15psi and then boost past the request to like 22-24 psi and go back and forth until the gear is over and I shift. Then it does the same thing in the next gear. i just want a solid 18-20psi without a manual boost controller! Things I have tried:
-Changed the N75J back to a NEW stock N75
-Replaced all the N75 vacuum lines
-Wastegate cracks at 7-8psi
-Replaced every worm feed clamp to a nice T-bolt clamp
-Boost leak tested to 18psi and found no leaks
-Deleted SAI, N249, and N112
-Unplugged MAF, nothing changed
LOG with multiple WOT pulls: [URL]...
So popped my plastic shroud off to change my oil and thought it was strange the the hose for the boost gauge was really oily. Is it normal?
View 2 RepliesOkay, here's the car
AWP 1.8t mk4 GTI.
- stock DP
- Forge 007 splitter adjusted 25 clicks
- Swiss cheese stock intake with k&N high flow
- APR stage 1 93 tune.
My boost gauge is currently reading peak of about 15-16 psi. I replaces some vacuum hoses that appeared to be worn, and to no avail. I have no CEL, and no codes thrown at all. This sound like a boost leak.
Bought a 1.8t 04 gli. Was boosting 15 pounds so i did a boost leak test. Found pcv up hose from valve to y pipe at valve cover was almost blown in half, so i replace all of that stuff with oem.
Boost leak test again, found where boost gauge is hooked up to, turbo outlet to n75, the hose was leaking, i fixed that.
Boost leak test yet again, n75 was not clamped down, so clamped that.
Boost leak test one last time, held 10 psi before blowing the cap out of the intake. Which is pretty dangerous, my cap is made out of a spray can cut in half. Sounds like a canon. Anyways i heard zero leaks.
So now I am boosting 18psi and holding perfectly fine. Why I am showing ZERO vacuum on my boost gauge??
I live in Scotland so have a right hand drive 2003 MKIV R32. I got a VF stage 1 kit fitted last year and now I want to fit a boost gauge. I've bought a NewSouth indigo 0-30 psi gauge and a column pod.
What I need to know is where to take the feed from, where is the best place to fit the vacuum tube to get the best readings? any photos would be good.
I plan on fitting it this weekend along with my oil pressure gauge.
I purchased a P3Cars gauge and an analog boost sensor with an ECS boost tap. I seem to be getting some fluttering noise at higher boost (greater than about 15 psi).
It was my understanding that digital boost gauges didn't buzz, so I thought I high have some movement of the boost sensor, hose, or the interface box for the gauge. I've got these pretty well padded and fixed with zip ties.
Do I need to get an inline restrictor (cotton swab, filter or otherwise) to eliminate this fluttering noise?
I ordered the gauge kit, installed it with the printed out DIY (CIMs)
Looks great, everything is tight, no leaks. All power going to the gauge (even the dimmer).
When power is connected via the plug in the back of the gauge, the needle goes from -30 to 30, full swing like some newer vehicles, not when the car is turned on.
Here's the problem, is doesnt read anything. Sits at -30 at idle, rev (limiter) and under load. The DIY says it should be somewhere around -20 at idle.
The only thing I can think of is the pressure sending unit is broken. I know faulty equipment is not uncommon and I'm not mad if that is the case as long as it gets resolved, I just want to get this thing working. This is NOT a bash against CIM either, I don't want anyone getting the wrong idea.
Also, I used a forge boost tap. Everything tight, and secure, no leaks going to the filter, or the 4" hose from filter to psi sending unit. Did I miss anything that's not in the write up? Early 11 model DSG MKVI
I own a 2004 Jetta 1.8t, about 6 months ago i had an oil leak problem and a cracked vacuum line. i fixed the oil leak and fixed the cracked line with 034 motor sports pcv hose kit. I snapped 2 more vacuum lines and repaired them with rubber hose. p0300, p0301, p0507, p0171, p0303. Are the codes I am currently having actually have had them for just over 6 months. I've replaced all plugs, I've upgraded to ecs tuning 2.0 coils. No fix, went back to oem coils which I am using now. It runs pretty good until i clear the codes. Then idles all over the place and the boost gauge bounces all over.
View 16 Replies 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.
Recently ran into an issue where my boost gauge stopped reading correctly and makes a weird buzzing sound under acceleration. (Whenever I am generating positive boost).
View 2 RepliesI installed a brand new "A line" 007 last night. Now I have ridiculous boost surge (15psi then to 5psi, then holds 11 hard) I did a N75 race valve last year (ECS), so I have my doubts that it is the N75. So what gives? The car wasnt that bad with a blown stock DV compared to this. I have minor mods: CAI, exhaust, Forge TIP, APR stage 1.
View 24 RepliesThe past few days ive been having some boost problems. Boost will surge to 15psi then drop to 0psi and continues on acceleration. Coming from work today I was unable to get past 5psi accelerating
Then on WOT the boost would spike to 23psi then down to zero. Checked all hoses i could see and reach to make sure they were connected.
Mods:
Forge 007 DV
ECS Race N75 Valve
Turboback Exhaust
Chipped
Short Ram Intake
I have a 99 Dodge Stratus w/ +191K miles. Recently the gas light would come on and the needle would drop down to "E" then go back up to where it started...regardless of how much gas is in the tank. Once the tank drops below half a tank, the light stays on and the needle goes all the way down to "E". I have no way of knowing how much gas is in the tank and I have to judge it by mileage. What's going on?? Is this an easy (inexpensive) fix??
View 1 RepliesI've got a slight surge that's very noticeable cold and not so much after warmed, I can hear the turbo surging and feel a slight power increase on and off, checked with forscan the normal values, alls inline, I did not ck fuel pressure yet but will, I noticed vgt, boost fluctuates when this happens, icp ipr readings inline, this is a 04 with throttle plate inside the air elbow area, can this cause a surge and how to test this, I am not familiar with this setup as my 05 does not have it.
View 6 RepliesCoolant temperature gauge bounce up and down.
View 6 Replies