Search found 194 matches

by thebigmacd
Sun Jun 08, 2014 3:37 am
Forum: General FOSS EMS
Topic: Chrysler 42RE Transmission Controller Brainstorming
Replies: 23
Views: 48103

Re: Chrysler 42RE Transmission Controller Brainstorming

Switching to a 3204 or 3208 in firmware later is beyond trivial (I love SPI/I2C). Just to clarify, you mean easier than trivial, not harder than trivial, which is how it read to me, right? For VR I am using LM1815, because once again I have some and I have made them work just fine on a Subaru 6/7 c...
by thebigmacd
Sun Jun 08, 2014 3:33 am
Forum: General FOSS EMS
Topic: Chrysler 42RE Transmission Controller Brainstorming
Replies: 23
Views: 48103

Re: Chrysler 42RE Transmission Controller Brainstorming

#3 Output Generation Turn OD, SCAN LEDs on and off Switch transmission solenoids on and off: Transmission Relay, 3-4 Shift, TCC Lockup Generate PWM for Governor Solenoid So, how would 1-2-3 shift be controlled them? Is it all taken care by the single PWM for Governor Solenoid? Yes sir, it is. It si...
by thebigmacd
Sun Jun 08, 2014 3:28 am
Forum: General FOSS EMS
Topic: VW nixed a MAF on 1.8TSI
Replies: 2
Views: 12751

VW nixed a MAF on 1.8TSI

So, my brother-in-law who is a VW tech is diagnosing a 2014 Passat 1.8TSI (EA888 Gen 3) that randomly stalls and gets a "MAP Sensor Signal Implausible" code set. Has new MAP and wiring all the way to ECM. Of course, there are basically no tech bulletins out for this car, but I digress. The...
by thebigmacd
Fri Nov 01, 2013 11:47 am
Forum: General FOSS EMS
Topic: How not to design an ECU
Replies: 7
Views: 8696

Re: How not to design an ECU

Nope, not a leaked document, it's public record. Although I'd like to see a non-redacted version :)
Bookout_v_Toyota_Barr_REDACTED.pdf
(834.06 KiB) Downloaded 777 times
by thebigmacd
Wed Oct 30, 2013 12:07 pm
Forum: General FOSS EMS
Topic: How not to design an ECU
Replies: 7
Views: 8696

Re: How not to design an ECU

Thanks for this. I'll comment on the specifics later, but I'm sure I've violated quite a few items from your list so far. It's more that I've not unviolated them yet in other cases :-) It can be be forgiven, since you aren't claiming to meet any standards but your own. :P Toyota, on the other hand...
by thebigmacd
Wed Oct 30, 2013 5:41 am
Forum: General FOSS EMS
Topic: How not to design an ECU
Replies: 7
Views: 8696

How not to design an ECU

https://www.dropbox.com/s/wnzqidngrtj8y2l/Bookout_v_Toyota_Barr_REDACTED.pdf The Bookout vs Toyota unintended acceleration case, transcript of testimony from Michael Barr. This is a very important read in my opinion. It shows how inept even a company like Toyota is at producing quality firmware for ...
by thebigmacd
Wed Oct 30, 2013 5:35 am
Forum: Lounge
Topic: EMS quote of the day competition
Replies: 215
Views: 172107

Re: EMS quote of the day competition

"You're obviously not running Windows in your engine. If you were, it wouldn't be able to reboot in 11 feet at 60 miles an hour." - Expert witness Michael Barr on Toyota's ECUs

https://www.dropbox.com/s/wnzqidngrtj8y ... DACTED.pdf
by thebigmacd
Thu Sep 12, 2013 4:05 am
Forum: General FOSS EMS
Topic: load calculations
Replies: 10
Views: 11272

Re: load calculations

I was responding to his second post in the first sentence. I didn't realize there was a mandated order of sentences???
by thebigmacd
Wed Sep 11, 2013 2:33 am
Forum: General FOSS EMS
Topic: load calculations
Replies: 10
Views: 11272

Re: load calculations

It's not necessarily an issue of prolonged load (unless your engine is overheating), it's more of an issue of increased cylinder-filling (greater air/fuel charge = higher pressure) causing flame temp and speed to increase, and incompletely-tuned spark maps. When you are going up an incline, you have...
by thebigmacd
Tue Aug 20, 2013 7:13 pm
Forum: Lounge
Topic: Daily WTF
Replies: 267
Views: 209806

Re: Daily WTF

"P responds to changes in error not error itself so just having a P term will keep you from reaching a target." It'd be wrong to embarrass this person by naming them here. Three words: WTF. All of these are second hand, so if there are any errors, let me know. Gee I could have sworn it is...