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jturnbull
29-08-2013, 02:09 AM
I'm having an issue with my HFS-3 where around 5500 rpm the failsafe is kicking in and disabling high boost as it should. I can't seem to figure out what the issue is. I have purged all the lines, cleaned the jets and FAV. It starts flow at 4000 rpm and gets 4 or 5 bars then cuts out at 5500 rpm.


The car is 01 S4 with high impedance Bosch EV14 injectors.

When I first installed the kit on my base tune I did not have any issue, held 4-5 bars of flow to redline. Went for a tune and we were not able to tune for the Aquamist as the failsafe started kicking in. The tuner has tuned 300-400 aquamist cars with no issue like this before. Tuner said he thought it could possibly be a bad FAV?

jturnbull
29-08-2013, 02:33 AM
Only change before the tune was the switch from 100% distilled water to 50/50 water/methanol which came out of a sealed 5 gallon container.

Richard L
29-08-2013, 04:41 PM
Does the gauge showed a drop in delivery rate at 5000rpm?

jturnbull
29-08-2013, 04:57 PM
No. Flow is consistent between 4000-5500rpm at 5-6 bars.

Richard L
29-08-2013, 06:47 PM
move WH a couple of clicks clockwise and let me know. 50:50 have a slightly different viscosity than 100% water.

jturnbull
29-08-2013, 07:06 PM
When my tuner was doing the tune he tried setting WH fully clockwise and WL fully counter clockwise and we got the same results.

Richard L
29-08-2013, 08:57 PM
So changing from 100% water to 50/50 caused the failsafe to activate?

Where is the "FS-DL" set to? (controller)

jturnbull
29-08-2013, 09:08 PM
Right before I went for a tune I filled the tank with 50/50. I never really went into boost on the way to the shop so I cannot say whether or not that was the case. However he was able to fine tune my base map with out any issue.

I read through this http://www.aquamist.co.uk/vbulletin/showthread.php?t=2091 thread and it seems like it could be a threshold issue?

When he started to turn up the boost and dial in the tune for the methanol thats when the failsafe started to kick in.

I tried adjusting the FS-DL fully clockwise last night with no change.

Richard L
29-08-2013, 09:12 PM
it does not make sense if none of the trimmers have any effect.

What is the "threshold" setting now?

jturnbull
29-08-2013, 11:53 PM
No matter where I adjust the threshold it will just kick in later but continue to cut the boost around 5500 rpm.

I have:
WH fully clockwise
WL fully counterclockwise
FS-DL fully counter clockwise

Richard L
30-08-2013, 06:41 AM
This does not make any sense.

If the gauge does not show any drop, the failsafe will not trip.
Are you sure there were no indication on the gauge at all during the boost cut?

jturnbull
30-08-2013, 01:18 PM
Yeah I'm really stumped. Flow is constant at 5-6 bars then just cuts out.

It was flashing the water level light and I filled the tank. To be honest I can't remember if it was still happening.

I would think it could be possible there is air in the feed line but I checked at the pump and by the FAV and I do not see a single bubble in any of the line.

The jet feed lines do empty but my FAV is higher then my points of spray.

Richard L
30-08-2013, 04:02 PM
Are you saying it was tripping the failsafe before you fill up the tank and it is not doing it now?

The system will detect trapped air in the hose and cut boost. It could happen at low tank level whilst the water was sloshing around. Air could easily been picked up and the failsafe reacted.

jturnbull
30-08-2013, 04:36 PM
No, it is still tripping the failsafe. My float is almost 1/3 the way up the tank as the edges are rounded.

I was saying it's turning on the water level LED when it triggers the failsafe.

Even if air somehow got into the line (unlikely as the tank hasn't gone below 30% full) I did purge the lines so I'm 100% sure there is no air in there now and its still triggering the failsafe.

Richard L
31-08-2013, 12:14 AM
The only possibility is something is in the turbine wheel, jamming the turbine. Give the sensor a good clean.

The moment the failsafe tripped, there was no drop shown on the gauge? Can you please make an observation for me.

jturnbull
31-08-2013, 03:35 AM
Here's a video of what's happening. http://www.youtube.com/watch?v=tjV4oNHxSJQ&sns=em

Shuts off the flow with no warning and drops boost down to wastegate pressure.

I noticed if I turn the fs-Dl down the gauge shows that it's still flowing but it still cuts the boost down to wastegate pressure.

Richard L
31-08-2013, 08:26 AM
The video is good. It appeared something is shutting off the system. It is more likely to be mechanical and not electronics. This is because the "B" led is still lit until a seond or two after the boost is dropped.

Chances are the problem it is either the flow sensor, a partially clogging filter or the FAV Can you taken the jet out and do a manual spray test.

jturnbull
31-08-2013, 05:57 PM
http://www.youtube.com/watch?v=bbtYPTjyU_s&sns=em

Here is the gauge on the test. Both jets have a nice cone shape to them.

Richard L
31-08-2013, 07:53 PM
edited.

Does the failsafe trip under manual test? Both yellow led on.

Strange the water level led comes on...

Richard L
31-08-2013, 07:59 PM
really very puzzling, the HFS3 does not read RPM.

Are all you jumper links in the default position?

Richard L
31-08-2013, 08:09 PM
what version is the HFS3?

jturnbull
31-08-2013, 08:12 PM
Everything is in the default position excluding the jumper to disable the cel (DR1).

I*had it on for a good 20 seconds and the failsafe*was not*tripped.

I just disassembled and cleaned everything. Jets fav and didn't find any contaminants in the lines or valves. Put the spare jet on the windshield and it sprays as it should. Hooked the jets back up and went for a drive same issue.

Possible a bad FAV?

jturnbull
31-08-2013, 08:13 PM
what version is the HFS3?

It is a HFS3-V3

Richard L
31-08-2013, 09:09 PM
Can you link DFS (disable fail-safe) and let me know if it makes a difference.

jturnbull
31-08-2013, 09:35 PM
Linked DFS and no change

Richard L
31-08-2013, 09:48 PM
Can you pm me your phone number, may be it is easier to give you a call.

Richard L
02-09-2013, 10:52 PM
update, problem has nothing to do with the aquamist system.