rusefi.com

The way I read this, there are two somewhat independent requests. 1. Hit button - get log event. This is a pretty common feature in a lot of software I use. The idea is a very sound one. Particularly in long datalogs, it's often hard to pick out the moment(s) of greatest interest. If you have a butt...

In a hostile environment, nope.
Bluetooth is a joke. Totally vulnerable to brute force plus the keyspace is tiny.
WPA2 is close but still dicey.

Update 2/23: still trying to get information out of Bosch, so far unsuccessfully. Starting to try and figure out a somewhat accurate way to make calibration gases for testing

Bosch LSU 4.9 Wideband sensors. Be very wary of ordering ebay/amazon/aliexpress for these sensors. They're very heavily counterfeited and copies often do not function as well as legitimate sensors. There appear to be two variants of this sensor element. One has larger holes in the tip, one has small...

Small suggestion: Use a ESP32 module instead of the one you have chosen. (it looks like HC06 maybe?) The ESP32 can do Bluetooth AND Wifi and is generally much more flexible. And they're very inexpensive (~$4 single here in US, < $2 in the quantity I buy them for another product, <$1 for the SoC only...

If you're interested in using rusEFI to run an engine, there is a very good chance that you're going to need to obtain sensors, solenoids, injectors, etc. to use with your engine. This thread exists to archive part numbers for common and useful parts along with places to get them and approximate cos...

^^^ Which is awesome Matthew. Perfect solution.

Update 2/13: Spent many hours this week trying to get in touch with someone at Bosch on the phone. Sent many emails. No response so far. If anyone happens to know someone at Bosch who may be willing to help and is in the automotive sensor division, please get in touch with Matthew or I.

This is the schematic of the triple VR decoder used in the Honda ECUs. Literally millions of this circuit were in production - every Civic and integra produced from 1992 to 2000 used this.

Something with a minimum of 4 bar capability and the ability to have a barometric pressure sensor as well? Worst case offer the ability to upgrade to a different sensor and utilize the mpx4250ap as the barometric sensor. None of the decent pressure sensors I know of have integrated baro. If you wer...

I've used the MPXH6xxx sensors with great success. They come in a ported version but they're MUCH physically smaller than the 4250AP. They come in 2.5bar (6250) 3bar (6300) and 4 bar (6400). They're SOP8 so easy to solder, very linear, good temperature characteristics, very high quality, generally a...

I think my asks are going to be more of a 2.0 than a 1.0 but... Error handling is soooo critical. I think that this splits into two pieces: 1. Define conditions that cause an error count 2. Define how to respond to a given error The nice thing about this is that some existing functions (like a rev l...

This forum exists for a simple reason: many users struggle to get their engine running well because of the garbage they put in, not the tool they are using. Just as it is possible to create ugly pictures with great paintbrushes, it's entirely possible to make a great engine run very poorly with a gr...

^^^ what he said. Additionally, it's fairly easy to check if cylinders are assigned to the wrong sensor. 1. in closed loop, make a significant but non-life threatening change to the fueling on a cylinder (10-20%) 2. Observe which sensor(s) see the AFR deflection 3. Rinse, repeat #1 and #2 until all ...

Andrey asked me to explain what I'm using for desoldering ECU connectors off OEM ECUs. I have two tools that I use for this. One is a small wave solder machine / solder pot. It's a medium size (~100kg reservoir, ~3000W, ~150kg total machine weight) solder pot. It heats a reservoir of solder to melti...

I would completely make use of the PE vs. non-PE modes on my RB20DET skyline because it's so easy to make boost at low throttle angles going up a hill.

For cable throttle: 1. VE table for airflow and just airflow. 2. Pressure vs. maximum lambda (leanest allowable commanded) Why? So you don't end up at 1.1 lam @ 220kpa @ 3000 RPM on a small-turbo car 3. TPS vs RPM for power enrichment mode enable 4a. Power enrichment: RPM vs target lambda table, pre...

I think this way of handling fuel (driver demand based, essentially) is a great idea. I'd do a similar thing on my skyline as it's entirely possible to get a couple pounds of boost at 3000RPM at 15% throttle going up a hill - and I have no desire to be at .8 there. Being able to modify or otherwise ...

My bad... I misunderstood at first reading. There are typically two enrichments: 1. long term CLT vs. enrichment (I described previously, not what was being discussed) 2. short term "post startup" enrichment immediately after crank (what the topic was, I missed it first go) #2 is implement...

Post startup enrichment is pretty common...

extra% vs CLT is very simple. works fine.

Some systems adjust the target lambda / eq mix. Some add %. As long as you're not trying to pass emissions you can be very crude.

A friend of mine worked on a J2534 interface using a STM32F103. He got most of the way done with it. Is your friend planning to release this as a $49 product or open design by any chance? Is he doing smth for himself or a commercial product? My friend is intending to release it as a commercial prod...

And in case it wasn't clear from the last post... 95 or 99% working doesn't cut it for a J interface. Many computers can cost $500-1000 to replace if you fuck them up. Bricking computers while programming is extremely undesirable. A lot of what you're paying for with the more expensive J interfaces ...

And $250 is CHEAP for a J interface! My MyCanic was about $800 when I got it and the CarDAQ plus my buddy has was close to $1600 new) I guess that's the part which I am failing to comprehend. How comes there is no such thing as a $49 open hardware/open source J2534? well... There is a lot of nitty ...

Andrey, you're making this too hard. CAN is just like ethernet or USB (well not JUST like) - it's a transport mechanism. It's almost as inconsequential as TCP/IP is for delivering movies with Netflix. It's a means to an end, that's all. There are some standards and conventions, but no magic. The hig...

and toyota vr sensors tend to age poorly and are very finicky to deal with. specifically very low voltage output at low rpm while cranking.

12 evenly spaced teeth on crank wheel
1 tooth on cam sensor
mag (VR) sensors

Why are you making things so hard? Denso "pencil" coils come in all shapes and sizes with 3 or 4 pin connectors. Toyota uses them. Honda uses them. Nissan uses them. Mitsufeces uses them. Subaru use them. They support ~150-200hp/cylinder with a 0.020" spark gap and a copper plug or 0....

The "semi-proper" thing to do is put a strain gauge on the shifter. Many higher-end sequential transmissions actually require this. The idea is that the strain gauge picks up force on the shifter, momentarily kills power from the engine (usually kills spark) and allows the shift to happen ...

That's pretty cool. We'll make a tuner out of you eventually, Andrey. Maybe.

Trans control is something we have not yet gotten into. I'm a thumbs up from a hardware support side of it. Do you have a schematic of either side of this transmission? Either something that shows the car side and what's connected to it, or even better would be something that shows the internals. H...