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So now the question is why bother putting together a waste spark setup? The distributor is staying because that is the the required trigger so why not use it? The AL6 box gives a good hot spark so just connect the AL6 to the ECU and call it done. The only down side is needing to replace the cap and...

image.png The tooth for #1 on the PIP signal (TFI -> ECU) is much shorter than the others. That's how it knows where #1 is. haha I actually just found this image too! Does rusEFI have a way to interpret that shorter tooth? And if so, I'm assuming it is able to interpret the crank angle and everythi...

very good. Does the OEM harness support this? It does support the sequential fuel injection but factory is the TFI not the coil packs and cam crank sensors. Fortunately there's plenty of unused pins from factory so I'll add them to my version of Proteus. Again, I'll still have the stock TFI pins wi...

mk e wrote: ↑

Tue Dec 29, 2020 10:37 pm

So again, what exactly are you doing?

Oops! I swore I put that! Sorry. Fuel = sequential, ignition = wasted spark.

What do the signals from the TFI look like? If it's just one tooth per cylinder from TFI -> ECU, and normal charge/fire signal from ECU -> TFI, then that'll work with zero software changes. Here's a good post about TFI that I'm referencing: https://www.therangerstation.com/tech_library/TFI_Diagnost...

mk e is correct - the tach output is completely independent of fuel/ign, so you can actually run any number of pulses per rev (even fractional) on any engine. VSS is very much not required, but does work if you want it wired to the ECU as well. Awesome! Thank you for clarifying that! Just a few mor...

So again, what exactly are you doing? Sorry. I'm still getting used to the naming conventions. For ignition, my plan is to do waste spark but also populate extra pins so that I could switch to direct fire later. I'm also still having trouble wrapping my head around a factory harness that doesn't ha...

Also, I've heard rumors of wideband o2 controller onboard one of the boards. Is this something feasible? If not, I'm guessing most wideband o2 sensor controllers output 0-5V and I can just hook this up to one of the analog inputs?

Full sequential fuel uses a bit less power the semi-sequential as the injectors are on a bit less total time, small difference though....10% or so depending. Direct fire ignition uses 1/2 the power as waster spark ignition, and about the same as distributor depending on the coils in each. That make...

Batch and semi-sequent5ial are different. Semi-sequential is fine just like waste spark. Batch injection...well sucks is the best word so I suggest you stay away for that. Batch came about, late 80s? to help keep fuel rail pressure more even than was seen with multipoint when you fire all the injec...

Once you have cam & crank position you can use any ignition you please really from sticking with a distributor to COP or anything in between. The important part I'm talking about is consistent fuel mixture and for that you really need to know at least crank position, like with a missing tooth w...

Semi-sequential injection, pair just like waste spark, works fine. The dead time and short pulse stuff plays a bigger role and you can't really get all the fuel evaporated before the intake opens so the low power mixture varies a little, but it runs fine. Perfectly good as you says. Multipoint, whe...

BTW you can run crank-sensor-only just fine, especially with a distributor. Sequential fueling isn't quite the holy grail that the internet makes it out to be. Sure, it'll get you those last few percent on emissions or fuel economy, but it requires hours on an engine dyno to find those. I run my LS...

So it looks like I really have three options here: 1) Figure out some way to get the TFI system working and buy the TFI distributor and coil. 2) The late ford explorers were converted to ignition coils with a cam/crank sensor which would be easy to control from rusefi. Downside is that I would have ...

You have it right. With just N teeth (and no missing tooth), you can get engine speed but not the exact phase, so you can't really do sequential fueling (well, you can, but it's a 1-in-N random draw about which phasing you get). Glad to hear my logic is still sound! haha I'm not sure you really wan...

Thanks mck1117! Glad I'm on the right track. I'm used to cars with cam and crank sensors for timing so maybe I'm missing something, but if I use the MSD ignition rather than TFI, how would the ecu know when and what order to fire the injectors? I'm assuming the tach might be "good enough" ...

So I've started combing through the wiring diagrams to see what I need to populate. From what I've gathered, there isn't anyone who's messed with ford's TFI ignition here and since I've already got a perfectly good MSD ignition on it I'll use that to be easier but I'll still route the pcm for it in ...

Andrey, you're probably right. I have not had a chance to really dig into the diagrams yet as I finally got the old ecu from my friend (see picture of layout). Now that I'm looking into the board more I realize there are no "coil drivers" :lol: so it's looking like I'll basically take the ...

Hello Andrey! Thanks for the words of advice! I was leaning towards Proteus and just leaving off the parts of the circuit I won't be using such as the ignition coil drivers etc. But leaving the design as is. Might add some circuit protection as I've used "ideal diode IC" on automotive circ...

Been lurking for a while and I'm finally going to start on a build for my friend's Ford Mustang 5.0. A little background on me, I am an electrical engineer working in research and have some slight experience in PCB design, though I would not call me an expert by any means. As a warning (and yes, I k...

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