Golf IV / Jetta IV :: Gauge Cluster Loses Power / All Warning Lights Flashing
Just started happening today. Dash cluster beeps, all warning lights flash, then gauges and lights go dead while under acceleration or cruising. Upon stop and return to idle the dash starts to operate properly until I take my foot off the brake pedal and start to accelerate. Tried searching and didn't find anything. What are the possible causes?
View 6 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 :: CEL Is On For P0116 Engine Coolant Temp Circuit / Range Or Performance
My CEL is on for P0116 Engine Coolant temp circuit, range or performance problem. I replaced the CTS, thermostat, and did a complete coolant flush/replacement last November. Car worked well over the winter no issues. Last week when the CEL came on it gave me P0301 and P0440 as well. I did a reset and the lights stayed off for the week. Then P0116 came back. Is it possible that the CTS is bad again? I measured the resistance on the CTS and hot it is about 300 ohms and cold is 2.45k ohms.
View 8 RepliesGolf 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.
View 2 RepliesGolf IV / Jetta IV :: Car Wouldn't Run 10 Psi Of Boost After Stop
I was riding along today everything running fine then I came to a stop sign and when I pulled off my car wouldn't run 10 psi of boost it was only running 5 psi so I when to a buddys checked everything over and all my piping looked fine so I went up the road and everything was fine so when I started going home it did the same thing pulled of shut the car off pulled off and it was fine again.
View 5 RepliesGolf IV / Jetta IV :: Chirping Noise Under Boost?
I think my stock DV is going bad, my car makes a weird noise under boost?
1. Only happens when first starting the car after it has been sitting for an hour or a few. (not overnight)
2. Does NOT happen when first start in morning.
3. Goes away after like 5 minutes every time and the normal WHIIISHH sound comes back like it should when I step on the gas.
4. It does not make the sound at idle.
This recording I made was of my car being revved up after it sat for one hour.
[URL] ...
Golf IV / Jetta IV :: Surge / Stutter - No Boost Leaks
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 RepliesGolf IV / Jetta IV :: Car Won't Go Into Boost, 2 Error Codes Detected
I was having an issue with my car not going into boost so I plugged my code reader in and it had 2 codes 1 was p1200 n249 malfunction and the other was diverter valve malfunction so I did the quick easy one and got a new factory diverter valve but it still doesn't go into boost and still reads p1200 n249 what do I need to replace or should I do the n249 bypass it's a bone stock jetta 5 speed.
View 5 RepliesGolf IV / Jetta IV :: Car Runs Fine But Won't Boost Over Wg Pressure
I just got done with a complete engine rebuild on my 02 1.8t jetta, had everything hooked back up and went to start it for the first time and it wouldn't. I went back looking for loose connections, nothing. Worked and banged my head for a day or two, I had fuel and spark but couldn't get it to fire. Finally I "choked" the intake to see if it was getting too much air and it fired right up. I unplugged my map sensor giggles and it starts up perfectly. I then hooked everything back up and what do you know it starts up and runs fine, but if I plug the sensor back in it kills the motor after about 10 seconds of running and won't start until I unplug the map again.
Car runs and drives but wont boost over wg pressure but that's probably because sensor itself is unplugged. I just wanna know what could cause it besides the sensor itself being bad. I ordered a new one waiting for it to get here (hoping it fixes the problem).. And I'm talking map (manifold absolute pressure) not maf (mass air flow), just in case people are confused.
Golf IV / Jetta IV :: Engine / Boost Complication After Stationary
I got a Mk7 in October and my Mk4 has unfortunately been parked since. I started it and let it idle to warm once a week or so when I went on Vacation for 10 days. Before going on vacation I moved the car and after warming up everything seemed to be normal. Unfortunately I neglected it once I got back and haven't started it since the beginning of December. I'm selling it here soon and so went out to spruce her up tonight and upon trying to start the battery was dead so a buddy came over and jumped it.
It started right up but immediately was idling funny which I assumed was because of the cold (it's 25 degrees F tonight and has gotten in the negatives in the past few weeks due to snow storms). I shut it down and checked the fluids which were all pretty low especially the oil due to a small leak. So I topped off the all the fluids and started it again and let it idle to full warm.
I decided to take it for a drive around the block and it was still driving pretty rough, no knocking or anything but the engine was "sputtering" and the CEL was on and flashed when I gave it gas. I'm running stock boost so my gauge usually reads around 12psi but is now only going up to 3-5 psi and the vacuum is only at -15 which i think used to idle at -20. I drove it to the gas station and filled it up from a little less than a half tank but it's still running the same and there's a slight burning smell from the exhaust.
I was worried it was my turbo but it was perfectly fine a month ago. I was thinking of throwing some Seafoam or Heat.
Golf IV / Jetta IV :: Boost Gauge Is Reading Peak Of About 15 - 16 PSI
Okay, 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.
Golf IV / Jetta IV :: Loud Screech While In Full Boost
I just replaced my my k03s with another one with only 20k on it. After I did this, I noticed a loud screech sound when in WOT. The screech lasts a little bit after i left off the gas when revving in neutral. I've been doing research on here, and I've read that it could be a boost leak somewhere or even the turbo dying. The shaft play is minimal though.
View 17 RepliesGolf IV / Jetta IV :: 1.8T VCDS Measuring Blocks For Boost / MAP?
Recently got my VCDS USB cable that I can use on the newer 1.8T Jettas and I haven't found a measuring block for boost or MAP data. My Scan Gauges don't give a MAP data field either for the 1.8T engine, while it does for the TDIs.
Where do I find this data? Surely the ECU monitors boost?
Couldn't find anything while hooked up to the Buddys Passat 1.8 that we did a TB and thermostat on yesterday.
Golf IV / Jetta IV :: Boost Fluctuating Instead Of Hitting Consistently
Ok so my 2002 gti is having some boost problems... Instead of hitting boost consistently the boost is fluctuating for example hitting 12 psi then 15 psi and it just hits and bounces back to 0. what could be problem I was thinking bad downpipe, bad waste gate, or bad n75 valve.
View 6 RepliesGolf IV / Jetta IV :: 2004 1.8T GLI - No Vacuum At Boost Gauge
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??
Golf IV / Jetta IV :: Different Boost Pressure When Idle And Driving?
I bought my GTI used and don't know what software its running but I have some questions about the boost pressure. When I'm in Idle the car will only boost to about 7-10psi when i rev the engine in neutral, But when I'm driving it will boost all the way to about 17-20psi if I really stomp it, 15psi if I'm just giving it a bit of "go". The car takes off and goes really quick, seems like it has a lot of power so I doubt there's a boost leak but I'm wondering does the car boost differently in Idle because it knows its not moving?
View 2 RepliesGolf IV / Jetta IV :: 2003 1.8t - Hesitation In Boost ( 3rd / 4th And 5th Gear)
2003, Jetta 1.8t, 5 speed, 76,500 miles ... The other day I was driving and all of a sudden I had a hesitation in 3rd gear. I have relized since that this hesitation occurs in 3rd 4th and 5th gear, but not 1st or 2nd. I am going to change the spark plugs tomorrow in hope to fix this problem. The hesitation occurs whenever you get into the gas and begin to accelerate(typically around 3000RPM and up). There are no dash lights on at all and the cars is running fine besides the hesitation.
View 2 RepliesGolf 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