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#44399
Updates in red.
DeeeeC wrote:
Fri Jul 10, 2020 12:58 am
[3] Things I want to do:
[f] I will use the stock missing tooth wheel (at flywheel) for the CKP and adjust the code if needed to accept this.
No code changes needed as my car uses a 60-2 crank wheel.
[g] Make sure I still get warning lights on my dash and to use the stock dashboard Tach and Speedo. I will add a display for TunerStudio.
Choosing whether to use a big-as* monitor like Tesla or carefully sculpt a tablet into the stock dash.
Extract information from my stock ECU maps and apply them in TunerStudio to get close to stock before I do real tuning.
I have my map but haven't got around to dissecting it yet. I heard it can be difficult.
#44403
You need to measure the injector voltage and current. The DC-DC converter stage can be tricky if you have high current because you can get voltage sag with the turn-on transient, big caps help but can affect the stability. You may also find that you only need high voltage for the peak and then battery voltage for the hold stage.
#44461
JHolland wrote:You need to measure the injector voltage and current. The DC-DC converter stage can be tricky if you have high current because you can get voltage sag with the turn-on transient, big caps help but can affect the stability. You may also find that you only need high voltage for the peak and then battery voltage for the hold stage.
This is where I'm a bit stuck because my car is not starting so I can't just hook up a scope to see what it's like. I'm gonna have to do some bench testing unless I find some info. I found some 'scope traces for similar injectors, it's an interesting form, with a pre-charge, massive spike, high hold, low hold and then off. The stock ecu and spares are all dead - hence the predicament.

I'm thinking, put a spare injector in a jar of acetone and try out a few voltages with some well-insulated wires outside with a bucket of water for safety. If I have to resort to this. Bosch part number 46805546 or 0261 500 013.

I found a motherload of oscilloscope traces here: https://www.forum.alfaholicy.org/156/61 ... anguage=en which I need to read through.
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