#11
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Re: Flickering blue light ?
That test is with the FIDC linkde as you requested. Without the link the bars
do not even reach six and none of the failsafe/warning lights are activated. The flickering of the blue light that I refer to occurs just at the onset of boost and before even the first bar (LHS) is lit. As boost increases the flickering stops the "B" light turns on solid and the bars will be lit progressively until 4 bars (or sometimes 5 briefly) are lit. In all other respects the system appears to be operating as expected. Cheers... jondee86 |
#12
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Re: Flickering blue light ?
Lets go a bit further, what is the fuel injector size and the power of the engine. In other word, are you using the full capacity of the fuel injector?
... Also the water jets size, if is quite small, you may need to change the flow table.
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Richard L aquamist technical support |
#13
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Re: Flickering blue light ?
Injectors are RC SL9-550cc/min and hit 80%IDC at fuel cut. The engine
boosts to 200kPa(abs) and is above 170kPa from around 4000rpm to 8000rpm. According to my logs the flowmeter is showing slightly higher peak flow now than it was with the previous 440cc/min injectors. This is most likely because the engine iis still running rich at WOT as I have not yet trimmed back fuel flow to compensate for the added W-M spray. I will need to check my nozzle selection, as the 380cc/min FAV restrictor may have reached its limit. The figures I listed above look as if flow is no longer following IDC at higher rpm's. Cheers... jondee86 |
#14
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Re: Flickering blue light ?
I have recalculated my nozzle selection based on the larger injectors and
the resulting slightly lower IDC at redline. The current combination of 1 x 0.7 + 1 x 0.4B should deliver a W/M to fuel ratio of 17%. This is a bit less than the target of 20% that I use on account of running without an intercooler. If I change the 0.4B for a 0.5 nozzle, the ratio would improve to 21% and I can trim that as required with the GAIN control. With the 0.7 + 0.5 combination, the estimated W/M flow rate into the engine will be ~365cc/min @ 80% IDC. This is still within the 380cc/min flow rating of the 0.5 FAV restrictor. How close is too close ?? I expect to be able to use a THRES value of 18% as due to improvements to the s/c bypass, the engine now runs cooler than it did a year ago Regards... jondee86 |
#15
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Re: Flickering blue light ?
Just a thought and I don't know if it is relevant. But prior to installing the
larger injectors I was providing a PWM signal that mimiced IDC from an aux output on my ECU. I changed this to a direct IDC pickup from an injector negative because I needed the aux output for another purpose. Thus there will now be a back EMF spike reaching the HFS-3 controller that was not present previously. Could this cause the light to flicker before IDC reaches the trigger point for W/M injection ?? Cheers... jondee86 |
#16
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Re: Flickering blue light ?
I think removing the restrictor is essential.
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Richard L aquamist technical support |
#17
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Re: Flickering blue light ?
Quote:
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Richard L aquamist technical support |
#18
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Re: Flickering blue light ?
Good call I changed the 0.5 to a 0.7 restrictor and straight away I could
see more bars lighting up on a trip to the mall. So the 0.5 was definitely holding back some flow. I will need to make a log to see what impact this has on W/M flow into the engine. Then I can decide if I need to change the nozzle size. Changing back to using a PWM signal from the ECU would mean changing back from full sequential ignition to wasted spark to free up an AUX output. I'd rather not do that if the flickering light is not causing any harm to the controller. Cheers... jondee86 |
#19
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Re: Flickering blue light ?
No more spare PWM outputs?
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Richard L aquamist technical support |
#20
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Re: Flickering blue light ?
Not at the moment, but if I revert to wasted spark ignition that will
free one up. I'll most likely give that a trial next weekend. If there is no performance difference (and there shouldn't be) I'll run it like that and see if it resolves the flickering light issue. EDIT: Made a couple of logs today and after looking at them I am of the opinion that the flickering does correspond to the pump "simmering" due to the pump relay being intermittently triggered. And as I have a spare non-PWM AUX output I think I shall try using that to trigger the pump relay e.g. turn the pump ON @ 18% and OFF @ 14% IDC. This will ensure that the pump turns ON without simmering. The blue light and the transistor in the HSF-3 that turns on the relay will still be twitching, but I don't think that will cause any harm ?? The only unknown and possible flaw with this plan is that the HSV may still be twitching, and that may not be good ?? The reason for changing plans is that I only recently finished rewiring the ignition setup for individual coils and sequential firing. I would prefer to keep that setup if this new plan can protect the pump and relay from the intermittent triggering. Cheers... jondee86 Last edited by jondee86; 11-03-2019 at 10:01 AM. Reason: Got a Plan B... |
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