Pump starts then stops within a second. MKVI GTI - HFS-4
 

Hello everyone,

I've had issues with my setup not long after getting it all set. Tuner/workshop is 500kms away from where I live so I can't just drive there whenever I face problems.

It started with leaks from the elbows, bad installation of the nozzle in the TBP and not a smooth rate of flow from looking at the gauge.

I recently faced an issue where the pump starts to pump once I hit the operating boost but then stops within a second! I moved the jumper to DFS and logged my car to see if there's any Inlet Air Temperature drop but there wasn't much as it used to be. Plus I've got a big amount of timing pull which tells me that there's not spraying into the engine!

I don't drive my car no more as there's no more joy with all this rubbish going on. All I do is drive it to only log it after a fix to see if there's any change.


Car and Setup:
- MKVI GTI
- HFS-4
- 2 Nozzles: 1.Throttle body pipe. 2.Throttle body spacer.


http://i394.photobucket.com/albums/p...pszqmjjmw3.jpg

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

1. Can you post a picture of the underside of the circuit board. I like to see the soldering mods.

The settings of the jumper look good to me.

2. A picture of the jet and FAV.
3. Place of purchase?
4. Which wiring diagram did you follow?

I can help you, no need to travel 500km.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Thanks alot Richard.

I managed to quickly take these pics. I was in a rush, so I couldn't open up the controller to take a pic. Will do that tomorrow once I leave work. I found out that the nozzle on the TBP leaks out. Mind the dust, it's always like this here in the Middle East.

I bought my kit from Abu Dhabi, UAE and they did the installation. So i believe that they used the TSI diagram for my my car specifically.

http://i394.photobucket.com/albums/p...pszw0iwkk4.jpg
http://i394.photobucket.com/albums/p...pshb9dxrte.jpg

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

OK, I will wait until tomorrow for the underside of the controller.

Regarding the nozzle leak, it is an installation problem may be it just need tightening up.

The electrical connector of the FAV appeared to be broken, in time the wires will corrode and the system will stop working.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I'll take the intake off and have a look at the FAV. In case the wires are corroded, what could be done? Please don't tell me to buy a new one as they are quite pricey.

And regarding the pics, Ill send them tomorrow as soon as I get my hands on the car.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Fill it up with silicon after inspection. Not the whole connector, just the opening section.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

As regarding the flow indication at idle, it is most probably due to interference. Are are mechanically minded? If yes, I will suggest a solution for you. BTW, who was your installer?

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I guess yea. I've installed some engine and suspension mods on my car my self. Fixed few leaks on the wmi as well. What are your suggestions?

I installed the kit in Tensai tuning and even had my K04 conversion there too. The system was working fine but then a problem dragged another problem and here am I now spending more time fixing rather than enjoying the drive.

Here's a video of how it goes when the jumper was on the DHB:-
Aquamist HFS-4 Issues

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

OK, lets do a test if the system is seeing the IDC.

Put the CLP jumper link (not used for your car) to FDC. This link hijacks the gauge to display fuel flow. do a video as before if possible.

The DHB jumper will not make any difference to your tests.

I also like to see a picture of the trimmers.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

A picture of the underside of the circuit board too.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Will do that tomorrow. What do you mean by trimmers?

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

There are a few adjuster (trimmers) on the left of the circuit board. I like to see the settings for your car.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Here are some pics. I hope that the circuit picture is clear enough.


http://i394.photobucket.com/albums/p...pspkgdupi3.jpg


http://i394.photobucket.com/albums/p...psi5jiaafe.jpg

http://i394.photobucket.com/albums/p...psuoqapqs7.jpg

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

The pictures are ultra clear, very nice.
The circuit board is properly solder linked. The board was manufactured in March 2012.

Please give me some history of this system,

1. The system has been on your car for a number years? Has it been working well up to now?

2. Does the gauge show lower flow than normal after you have repaired the leak?

3. Any maintenance done on the in tank filter, nozzle pattern etc?

Please help me with those questions.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Hey Richard.

The system has been on my car since December 2012. It has been working but not 100%. I faced many leaks thought the 2 years I had the system. Few installation mistakes with resulted in that TBP leak. Sometimes when I get meth flow, failsafe activates for a second the deactivates, the activates again and so on. At first, I thought it's normal. But seems not anymore.
From how much leaks I had, the bottom of my tank enclosure isn't black anymore. And the trunk mat smells of meth as if it has been soaked for years with meth lol.

Flow is usually normal. Never seen low level of flow. And again, I added an epoxy to the outer section of the level sensor to block another LEAK. That's the only mod I did I gues.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I like to address a common issue on the VW. Interfere causes the gauge to flicker sometimes mistaken as real flow.

I like to make one modification on the green harness (user port). Slice open the vinyl sheath as close to the RJ12 connector as possible. Pick out the white wire and cut it in half.

This wire is not needed on your setup. It sometimes picks up interference from the red and green wire of the Di fuel injector. Let me know how you get on. A picture if possible.

What type of tank do you use? Do you use our tank adaptor that comes with the kit? It has a similar seal as the water level sensor. If it was over tighten it will develop a split in the long term. A replacement gasket is needed.

Shipping by post is very reasonable.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

A video taken after changing the jumper from CLP to FDC.

https://www.youtube.com/watch?v=aCD6yoF3aAU

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I did the white wire adjustment. All what happened was no flow at all. I was surprised to be honest coz I know that it's not used in Tsi setup. So I had to solder the wire back again. Strange..

And all of my setup is from Aquamist as here's no compromise in quality. But I unfortunately, the installers were bad in my openion. I'm trying to get fed up with all this.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Keep the white wire cut.

Can you do a manual "SYS" test with the jet out and engine running. Just a second or two to see if the gauge shows flow.

We are going back to basics

We have no control over the install, Your controller looks brand new. You do look after it well.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I can do anything if it will make it work. Let me know how they test is done step by step please.

Shall I put the jumper back to CLP?

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Were you having problem making the manual test work? I couldn't quite understand you last post.

Assuming you meant you "can't" make it work... a few questions:
1. Did the pump come on when you when you link the "SYS"
2. Did all the led lights up when "SYS" is linked

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

The IDC reading is good from the video. We can now focus on the delivery.

One thing you might like to check... there is a thin blue and red wire going into the pump relay assembly, make sure it is not detached.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Sorry I didn't make that clear. What I meant was, could you explains what's the manual SYS test is. I'm not familiar with that.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

OK, "SYS" is a link on the controller that actives the system manually. Turning the pump and FAV on. Make sure the engine is running and only do it for a second of two.

Download this HFS4-v2 manual so that you know the system better.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I did the SYS test and the pump worked for the 1-2 seconds I placed the jumper there. I put the DHB back and went for a drive. Again, same thing is happening. Failsafe activates and pump stops in no time.

I've also checked the two thin wires you mentioned. They are in place and no sign of them being lose.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

This is very strange.

Unplug the FAV harness so not water is injected. SYS again, tell me if the pump can now run for several seconds without cutting off.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

any updates?

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Hey Richard,

I was away for the last few days. Just came back home from work.

I tried it and the pump kept on working for as long as I keep the the jumper on SYS. I now have bigger hope that you will figure out the issue so soon.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

OK, the controller and pump circuity is working as it should. is it possible to watch led on the controller as you drive? I like to know of the amber led stays lit after triggering.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I'll do that and try to locate the controller in a place where I can clearly see the Amber LED. What would that indicate? I mean if the Amber LED worked or not?

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I tried this right now. Sometimes it stays but just for a short while where sometimes it just goes off immediately after failsafe is triggered.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I've also did some data logging right now with DFS, the timing pull is terrible. It indicates that there's no WM flow at all even thought the gauge shows flow.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Have you reinstated the FDC jumper back to PRK? The gauge cannot show flow if there is no flow.

Let me know.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Yes, it's back in PRK.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

is it still showing flow?

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Yea. But then as I said, the data from the logs indicates no flow at all. And the pump still stops after the FS triggers.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

Thanks for clarifying this "the pump stop after the failsafe is triggered.

OK, can you disable the failsafe by linking "DFS" with the "PRK" jumper. Let me know if the pump stop this time.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

IF you mean having jumpers on DFS+PRK then ice already done that. The pumps stops as well.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

This is very puzzling for me.

OK, let's do the next test, it will be a visual one.

Place the opened controller in line of view, tell me if the amber led continues to illuminate after triggering. I like to know if triggered is interrupted and stops the pump.

Re: Pump starts then stops within a second. MKVI GTI - HFS-4
 

I did some runs just now and results are as follows:
- Pump starts then stops but flow is still carying on. I double checked that there's no flow with my data logging as I keep getting very big negative numbers of timing pull.
- Pump primes then go quiet. After the FS is triggered, the Amber LED goes off immediately or right after triggering by approx a sec.