rusefi.com

Here's what the frequency looks like when you get rolling, pre-filter: 0 347 48 336 49 41667 2 71 4 347 183 57 5 535 15 111111 8 6 591 7 7 7 8 8 7 8 8 8 8 8 8 So yeah, it's a noisy mess, and I don't know what to do about it. The filter doesn't help much, it comes out looking something like this: 0 1...

Some VSS scope captures at low speed for reference. There's a little EMI noise, not sure if that's what's causing the issues or not.

I got 34 automatically-shifting miles in today. The VSS is a problem, but otherwise it's drama-free. I reckon maybe the issue I am seeing with the VSS is probably the same as Andrey was having with ISS. The next step is to throw a scope on it to see if I'm getting a signal that ought to be usable.

I woke up this morning with the goal of making the transmission shift automatically. I didn't reach that goal, but I'm really close. Remaining problems: 1. I forgot to reconfigure my shift solenoids after my configuration got wiped. (I think this was due to changing FLASH_DATA_VERSION, but IDK how t...

A multimeter in DC mode, which I assume does basically the same thing as a RC circuit would, shows 9.8-11.2 volts. It doesn't seem to vary in a way that makes sense to me, it seems pretty random. I feel like ignoring for now, controlling it with ordinary PWM seems to work fairly well. I just thought...

If that's the case it's slower than 10hz; at 100ms it looks the same: 100ms is the highest my cheap USB scope will do.

I need help understanding electronics again. The pressure control solenoid seems to have PWM control targeting some current, but the duty cycle doesn't change significantly, only the frequency. This goes against my understanding. Does varying the frequency to a solenoid change its output force? KOEO...

His spirit marches on.

The 10K resistor has been quite successful. There's no noise when parked. When you start moving there's some noisy nonsense but it settles out quickly and behaves as it should.

I have acquired a 1997 Mercury Grand Marquis for a transmission test subject. It's got a 4R70W, which ought to be pretty easy to control. I bought this thing from a kid in Oklahoma City on January 20. I failed to sufficiently "buyer beware" and only gave the title a passing glance. As it t...

Short answer is "it varies"

Older stuff is purely mechanical, newer stuff has computer pressure control and injector firing.
Most new injectors are high-ish voltage piezo, and are fired multiple times per injection cycle.

In my head, the way to do this is to make an ELM327 Hellen module, and let it do the heavy lifting. Interfacing with the ELM327's AT firmware should be easier than implementing n weird serial protocols.

Here's a doc that may be helpful:
https://rutronik-tec.com/wp-content/uploads/2015/06/Decoding-SENT1.pdf

Well, that kinda works. The dialog stays the same size as if the fields were actually there.

I need some ideas for generalizing the configuration interface for transmission control solenoids. Currently I'm looking at the GM 4LXX series - 4L60E, 4L65E, 4L70E, 4L80E, 4L85E. Control on these transmissions has a lot in common, but also quite a few differences. Currently I'm focusing on the 4L60...

There are still a few things I don't know about how the TCC is controlled. The service manual states, regarding the 4-3 downshift: The PCM de-energizes the TCC solenoid valve, and operates the duty cycle of the TCC PWM solenoid valve to release the converter clutch for a smooth disengagement, prior ...

blundar doesn't have time/motivation to get me screenshots, but I found some that seem helpful: https://ls1tech.com/forums/automatic-transmission/1416477-how-4l60-65e-trans-tuning-shifting-tcc-tm-w-pics.html This makes a lot more sense than the SUPERMATIC controller tables, and mostly agrees with t...

I'm putting some time into developing this again, under pressure from nmstec . Right now I'm trying to understand the control strategy for the TCC. I've asked blundar for some screenshots of OE tunes, hopefully that will provide some insight. nmstec posted a screenshot in Slack of a few tables from ...

Current status of the new engine is that the block is painted and the crankshaft is installed. I haven't been working on it much because some other stuff has taken priority. I agreed to swap the transmission in my parent's car with a junkyard pull. I drained the fluid from the junkyard pull and it l...

Doesn't dfu-util work on Mac?

@turbotrana OK I've got the PCB updated, this link should get you the right file. https://github.com/rusefi/rusefi/raw/master/hardware/Breakout_104pin_EEC-V-Connector/export/eecv_gerbers_0.3.zip Upload that to JLC and it should automatically select 4-layer and the proper board size. I think the only...

Hold off for a sec on ordering that, that's actually the old 2-layer files.

I've used Dirtypcbs quite a bit, but I found that this board was big enough that it was cheaper from JLC. At least when I did it; pricing may have changed.

Here are the fab files:
https://github.com/rusefi/rusefi/raw/master/hardware/Breakout_104pin_EEC-V-Connector/export/eecv_gerbers_0.1.zip

@turbotrana I'll send you one if you pay for the shipping. Not sure how much that would be. If China->AU shipping is comparable to China->US shipping, it might be cheaper for you to get some made. 5 PCBs cost me $44.50 shipped. There have been two versions. The first version I had made is a 2-layer ...

Walmart restores headlights for like $10 or $15

Fonzie wrote: ↑

Wed Sep 15, 2021 12:15 pm

AndreyB wrote: ↑

Mon Sep 13, 2021 8:58 pm

Are we concerned about me being able to eat food washed in this dishwasher later?

I would not wash the food, only the dishes. My opinion.

https://www.huffpost.com/entry/dishwasher-cooking_b_3605859

Maybe a siphon solvent sprayer like this?

https://www.amazon.com/Milton-S-157-Siphon-Spray-Cleaning-Tubing/dp/B0002SQT96/

Hook up your air compressor to the spark plug hole and listen for the hissing. That will tell you if it's the exhaust valve, intake valve, rings, or head gasket. If it's the rings, there's all kinds of potions people put in their cylinders to try to free up the rings. Sometimes they even work.

Block and crank have returned

I’d just like to interject for a moment....

Someday we will convert Andrey to Linux.

- btw i use manjaro

Pic for context: Notably absent are the block and crank, which are off at the machine shop.

- junkyard dave