Search found 579 matches

by stefanst
Sun Oct 06, 2019 11:26 pm
Forum: Your car & your engine
Topic: 1998 BMW V12 engine M73 #55
Replies: 39
Views: 4020

Re: 1998 BMW V12 engine M73

I shall assume that's the immobilizer messing with you.
by stefanst
Sun Oct 06, 2019 10:10 pm
Forum: Your car & your engine
Topic: 1998 BMW V12 engine M73 #55
Replies: 39
Views: 4020

Re: 1998 BMW V12 engine M73

Holy S&%t!

Congratulations.
by stefanst
Mon Sep 30, 2019 1:39 am
Forum: Hardware
Topic: rusEFI display
Replies: 54
Views: 7843

Re: rusEFI display

What I don't know is how they get zeroed when you turn off the ignition. Is the dash getting constant power from the room fuse? I mean the fuel gauge can stay where it is, but all the other ones, especially the tach should probably get zeroed with shutting down ignition.
by stefanst
Sun Sep 29, 2019 11:38 pm
Forum: Hardware
Topic: rusEFI display
Replies: 54
Views: 7843

Re: rusEFI display

I think these steppers usually self-zero during startup. You start the power to the dash and they go a few steps negative to zero against the hard stop.
The above referenced steppers are what's used in most OEM dashs. They are designed for instrument use.
by stefanst
Tue Sep 24, 2019 3:00 am
Forum: Hardware
Topic: Frankenso - ECU shield compatible with OEM case / official
Replies: 536
Views: 121182

Re: Frankenso - ECU shield compatible with OEM case / official

[...] What's the INJ current across the 0 ohm resistors. Is it single INJ per mosfet and the STM32 batches them, or can you connect 2 INJ per mosfet. Basically is 0805 ok or do I use 1206. Old Miatas run batch injection with 2 injectors per channel. Several of these are running with 0 problems so f...
by stefanst
Tue Sep 24, 2019 2:13 am
Forum: Your car & your engine
Topic: 99 miata 1.8 turbo PnP setup #53
Replies: 94
Views: 2993

Re: 99 miata 1.8 turbo PnP setup

Sorry- I forgot about the promised tune files! Here is a fuel tune and and aggressive (93 octane ONLY!) timing tune for turbo NB1. You should definitely drop the timing considerably. Maybe divide by 1.1 across the board to be safe. I had this running on a 99 head with a 94 bottom which drops the com...
by stefanst
Sat Sep 21, 2019 11:09 am
Forum: Your car & your engine
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 144
Views: 21930

Re: red 2003 VVT test mule Miata NB2 #27

Simple observations: Your MAP calibration is off. Should be around around 100kpa before cranking. 30 also seems low while running at 1800rpm or so. AFRs are super-rich. Lean that out. It may help drop the idle a bit. If idle stays high, hold something (your hand?) in front of the throttle plate. Blo...
by stefanst
Fri Sep 20, 2019 5:44 pm
Forum: Your car & your engine
Topic: 99 miata 1.8 turbo PnP setup #53
Replies: 94
Views: 2993

Re: 99 miata 1.8 turbo PnP setup

Welcome to rusefi! Looks like you're running a weld-el manifold with a chinacharger? Can't see your wastegate. What are youdoing for boost control? What injectors are you running? NB Miatas have fixed fuel pressure, so the more boost you're running the faster you run out of fuel on a stock injector....
by stefanst
Thu Sep 19, 2019 10:35 pm
Forum: Your car & your engine
Topic: rusEfi needs v12
Replies: 76
Views: 4795

Re: rusEfi needs v12

I think best use of W12 would be to de-stroke to maybe 3.5l, ITBs, super-hot cams. Make it revv 12,000rpm and swap into Miata.
by stefanst
Thu Sep 19, 2019 12:11 pm
Forum: Your car & your engine
Topic: rusEfi needs v12
Replies: 76
Views: 4795

Re: rusEfi needs v12

It sounds like something rubbing or a bearing in an accessory or similar, I don't think thats an internal bad things kind of sound.....hard to say from the video though. Agreed. Life, it sounded very much like a power steering pump low on fluid, but moving the wheels didn't change anything. Some pu...
by stefanst
Mon Sep 16, 2019 12:26 am
Forum: Hardware
Topic: microRusEfi
Replies: 187
Views: 14220

Re: microRusEfi

2.54mm vs 2.5mm over ten columns is 0.4mm. Hardly noticeable. So the footprint may be wrong and possibly should be fixed in future revisions, but it hardly matters in real life.
by stefanst
Wed Sep 11, 2019 1:56 am
Forum: Your car & your engine
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 144
Views: 21930

Re: red 2003 VVT test mule Miata NB2 #27

instant RPM does not work reliably - I am rolling back to "slow" RPM, will have to investigate instant RPM implementation some idle PID games attached but I am a blind man in the dark here, PID tuning makes no sense to me :( Could you post a screenshot of your settings? Are you using Electronics th...
by stefanst
Tue Sep 10, 2019 1:13 pm
Forum: Hardware
Topic: rusEfi own wide band controller board add-on using CJ125
Replies: 301
Views: 28223

Re: rusEfi own wide band controller board add-on using CJ125

Fantomiaso wrote:
Tue Sep 10, 2019 8:59 am
Oh, how hard is to be an idiot... Finaly, it works. Now I know, that if it is 301 marking on SMD resistor, double check it is not flipped 10E one...
In my extensive experience, being an idiot is one of the easiest things....
by stefanst
Tue Sep 10, 2019 12:52 am
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

So this block and another one just like it, as well as the connectors hooking into them are apparently the reason why my sensors don't read so good. Bad Ground Dist Block.jpg These are in the passenger footwell on the '93 Miata (pretty sure '94 as well, maybe 90-92 too). It appears that this footwel...
by stefanst
Tue Sep 10, 2019 12:34 am
Forum: Hardware
Topic: microRusEfi
Replies: 187
Views: 14220

Re: microRusEfi

One semi-mystery is solved. The screws holding the housing bottom to the top do seem to be M3.5 x 0.6. Because M3s just won't cut it and M4s are way too big.
I guess.
by stefanst
Tue Sep 10, 2019 12:31 am
Forum: Your car & your engine
Topic: 1990 Geo Storm GSI - Advice/Suggestions? #18
Replies: 272
Views: 28186

Re: 1990 Geo Storm GSI - Advice/Suggestions? #18

Ok, So I've got two LS engines lined up. One for my Trans Am swap, and one for my Impala swap; both are complete and ready to run with harness, ECM, and accessories (alternator, water pump, etc.). One LS is drive-by-wire and the other is drive-by-cable. My question... 1.) Does rusEFI support drive-...
by stefanst
Mon Sep 09, 2019 3:07 am
Forum: Hello World
Topic: Sup guys!
Replies: 8
Views: 509

Re: Sup guys!

Maybe I missed this part: Do you have a particular engine / vehicle in mind?
by stefanst
Sun Sep 08, 2019 11:41 pm
Forum: Your car & your engine
Topic: FrankenFerrari - V12 Ferrari 308
Replies: 45
Views: 2895

Re: FrankenFerrari - V12 Ferrari 308

12V and 17A is 200W. That seems like a lot of power for a throttle body. I don't really have a means of comparison, but it really seems excessive. I would install maybe a 5A flying fuse in the next version. If it blows, you know it's the raw amps. If it doesn't blow, but the driver blows again, it's...
by stefanst
Sun Sep 08, 2019 11:19 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

So, after this rant it occurred to me that Mazda just CAN'T be THAT stupid. So I decided to test my ground connections. Turns out my power grounds going to the ECU are not grounded at all. Near infinite resistance to ground. Something is fubared. This MAY explain why my stock ECU failed. It may have...
by stefanst
Sun Sep 08, 2019 10:44 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

So, on to my Ground problems. It appears that, when the injectors are REALLY firing, my ECU ground is floating up by approx 0.3V or so. Since the sensors are essentially (more or less) externally grounded, this really messes with the readings from the sensors. The reading of my coolant temp sensor v...
by stefanst
Fri Sep 06, 2019 8:31 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

Hmmm, should I just consider the board was zapped while it was on the bench, and it took this long for the ESD issue to produce a noticeable result? I'm a skeptic about that, but also it's possible. I'm mostly trying to make sure there isn't some kind of data here that could help make the design mo...
by stefanst
Fri Sep 06, 2019 1:54 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

Hardware and reality. Two things we cannot trust :( But we probably do not have resources to deal with limping mode and automatic switch to limping mode :( In my particular case, I think it would have helped to set the MAP value to let's say 60 when it's out of reasonable range. It would have run t...
by stefanst
Fri Sep 06, 2019 12:32 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

I was logging at the time it first happened. No trace of anything suspicious in that log. The NA6 Miata does have a weird sensor ground loop which seems to cause all kinds of noise. So I can't say for certain that we didn't have a signal above 5V on some sensors at some time. But I am under the impr...
by stefanst
Fri Sep 06, 2019 12:37 am
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

So, I think I traced it to a faulty brainboard. The output from the opamp worked just fine, but after the voltage divider I got 0V, or close to it. It appears that this board just pulls the PA6 pin to low as soon as injectors and / or ignition start firing. It just started randomly. Weird. Replaced ...
by stefanst
Thu Sep 05, 2019 10:56 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

One thing I forgot to mention: This happened once, driving. I limped back to my office, using un-tuned MAF. Then I replaced the MAP sensor. The engine fired up, I had signal for about 5 seconds or so and then the engine died. Interestingly it died RIGHT when I started a log. Now it dies every time I...
by stefanst
Thu Sep 05, 2019 9:57 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

[...] Do you have rusEfi console? What does analoginfo display while MAP says zero? Well, analoginfo shows the following after cranking: MAP ADC6 fast PA6 adc=0.01/input=0.02v/divider=2.00 While before cranking we get this: MAP ADC6 fast PA6 adc=0.90/input=1.81v/divider=2.00 All the other sensors, ...
by stefanst
Thu Sep 05, 2019 2:09 am
Forum: Your car & your engine
Topic: red 2003 VVT test mule Miata NB2 #27
Replies: 144
Views: 21930

Re: red 2003 VVT test mule Miata NB2 #27

russian wrote:
Thu Sep 05, 2019 1:42 am
Wooohoooo!
Awesome. When I heard the whoop-wooop behind you, even I, sitting on my sofa at home, had my heart skip a beat or two. Ambulance in this case is MUCH better than our friendly Jersey City Cops.
by stefanst
Wed Sep 04, 2019 11:51 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

Oh right :( with value out of range, it returns 0 :( if (cisnan(mapKPa) || mapKPa < CONFIG(mapErrorDetectionTooLow) || mapKPa > CONFIG(mapErrorDetectionTooHigh)) { warning(OBD_Manifold_Absolute_Pressure_Circuit_Malfunction, "unexpected MAP value: %.2f", mapKPa); return 0; } return mapKPa; Looks lik...
by stefanst
Wed Sep 04, 2019 11:42 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

russian wrote:
Wed Sep 04, 2019 11:05 pm
[...]
Do you have rusEfi console? What does analoginfo display while MAP says zero?
Sorry- nowhere near the car. It's at work and I'm at home. I do have the ECU, but it behaves nicely on the bench.
by stefanst
Wed Sep 04, 2019 11:41 pm
Forum: Your car & your engine
Topic: 93 1.6l Miata stock engine (for now)
Replies: 37
Views: 1664

Re: 93 1.6l Miata stock engine (for now)

So, I get error code 105. "OBD_Manifold_Absolute_Pressure_Circuit_Malfunction = 105,"
I have low value threshold at 5 and high threshold at 250. I assume one of these gets exceeded for some reason and the controller shuts it down- correct?