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<nmz787>
well I would say that starting with an OEM ECU and at least scoping out the injectors and timing would be good... but not having it seems like getting started shouldn't *kill* the engine... I mean, you aren't debugging fuel timings and trying the new settings immediately on high-load on a dyno or something. you could do that I guess... but my guess would be using some gas analyzers that are self-heating
<nmz787>
(so they are sensitive without the exhaust being hot for too long) should get someone determined pretty far.
<nmz787>
I'd guess if you didn't know where to start, you could at least figure out a rough place for timing to start, and then just start lean and keep injecting in a binary search tree pattern to find a place where it'll start up, then tune by ear and by gas analyzer from there. Get a piezo sensor with a microphone conditioner and plug that into your laptop and audacity or something, watch the FFT of that for
<nmz787>
ping detection
<nmz787>
and the throttle body is good for runaway prevention... which is something that is more serious if you are using an automatic transmission (because with a manual and runaway, you can at least try putting it in 5th gear and locking up the brakes)
<nmz787>
or idk, chance it with jamming into reverse (I bet there's a youtuber who's tried this for patreon donations)
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<sync>
nmz787: you need to remap your ecu, otherwise it will always be rich
<sync>
also, diesel engines don't really ping
<sync>
you need to look at the cylinder pressure with a highly dynamic transducer
<sync>
the issue is your injection window is incredibly small
<sync>
and you need to reliably place the fuel inside the bowl
<sync>
if the diesel hits the rim of the bowl your piston melts almost instantly
<sync>
and yes, throttle bodies can be used a runaway protection, however they are not in most cases
<sync>
they are used to optimize emissions at part load and to make turning a diesel off quieter
<sync>
no other use
<sync>
nmz787: 03 jetta, so BEW engine code?
<sync>
that one is very easy to flash
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<nmz787>
sync: nah ALH
<nmz787>
I believe it's just earlier than BEW
<nmz787>
I will definitely say that all my above commentary was just sort of what I thought about doing in the past... but I only really ever got as far as converting a carbed engine to throttle body fuel injection, and that was just an intake swap with all the associated wires and electronics
<nmz787>
I basically just took the entire wiring harness of the FI vehicle and went through the fuse block and schematics, cutting out wires that weren't engine related
<nmz787>
then I pretty much found a place in the engine bay to jam the fuse panel, so I had the main truck fuses under my steering area, and the engine all under the hood
<sync>
ah yeah ALH was also common in germany
<sync>
it's not too bad
<sync>
but you really want to recalibrate the fueling maps
<nmz787>
had to add an electric fuel pump too, low pressure, but I think I specced a too-powerful motor and it always whined... I thought of making a power controller for the motor and trying to just reduce the pump rate to quiet it down... but the interior sucked so it eventually got taken away
<nmz787>
to a new life for some offroad derby
<nmz787>
my ALH smokes a bit on startup now, and if I pound the throttle during heavy accel (moreso when cold)... but it always kinda stink
<nmz787>
I wish it didn't smell as much like, idk, cooking crayons
<nmz787>
the big ford diesels don't seem to smell at all similar
<sync>
get a gas engine then
<nmz787>
and folks report the new 2.8L GM mini-duramax doesn't smell at all
<nmz787>
yeah I ended up doing that 6 months ago
<sync>
yes, modern emissions systems work very well
<sync>
but lower the thermal efficiency by a lot
<nmz787>
mmm
<sync>
but who cares about the smell
<nmz787>
eh, it's gross
<sync>
no, it is lovely
<nmz787>
and I am a person who is OK with the smell of raw gasoline...
<nmz787>
idk, maybe I need to do some maint on the engine?
<nmz787>
240k miles I think
<sync>
it is probably fine
<nmz787>
I've only changed the injectors, maybe 10-15k miles ago, got slightly larger nozzles, but like, barely larger
<nmz787>
but it smelled before too
<sync>
maybe change the glowplugs
<nmz787>
eh, it's pretty warm here though
<sync>
did you flow the nozzles after you changed them
<sync>
doesn't matter
<sync>
it will glow all the time
<nmz787>
nah I got a hot swap
<nmz787>
sent them my cores
<nmz787>
so they were already tested an balanced
<sync>
it cannot maintain proper combustion temperatures even through prolonged idling
<sync>
just because it starts doesn't mean that it runs properly
<sync>
I just retimed my tdi, don't really mind the smell at all
<sync>
burnt atf is worse
<sync>
I also need to remove the dpf soon, too much backpressure
<nmz787>
hmm
<nmz787>
I assumed the computer controlled all the params
<sync>
and it doesn't serve any purpose but a legal one
<sync>
sure, but changing what the computer does is easy
<Noxz>
I like the word for removing a component (like DPF) that people use.. "delete"
<Noxz>
I kinda wished that the engine I purchased came with the DPF and such, simply because I am going for the sustainability route, and even if attempting to use bio, it doesnt mean what is urnt is good for the sourroundings
<Noxz>
just got back from grocery store after hike, gunna chill with the pup for a moment..