Ronny

Did all the suggested changes, still a little hesitant from idle and stabbing the throttle so I tried setting the the 1000 rpm sens to 6 and now it seems to be happy, will have to adjust the decay and sens when I can get it on the road. when i populated the chartgetemp table, idle got a little choppy. maybe the idle settings need a little tweaking now. The ignition table is roughly what the e36 basemap has in it around the vacuum my engine shows at idle. Does anyone have a suggestion for the ignition table?

I was wondering if someone might be able to help me figure out accel enrichment. The engine is a m50b28 8,5:1 compression ratio, cat cams 275 degrees in and out togheter with s50 euro itbs. when giving it a little throttle it goes super lean and almost stalls and the fuel table numbers seem off. (not yet been able to take it on the road) Just mashed some numbers in to where it could actually pull itself out of the garage without leaning out and stalling. Made a log of startup and some throttle blips. PC Datalog - 2023-05-14 1;40;38 pm.llgx 320i.pclx

Hi check the parts number of your cam sensor to make sure it is a m50tu/m52 sensor. m50 has a VR sensor, tu/M52 has a magnetic sensor. some of the first Tu engines also had vr sensors (rare)

OMG, I feel real stupid right now, totaly missed the folder that said "Idle actuator" in bold letters... That clears up any questions I had.

Issue 1 resolved, will try to make a log of the starts later this week. As for the PID setup window, Where can I see these values? and the integral is not listed in idle settings. propotional and derivative gains are listed in ignition idle control. And lowering the values in base position raises the idle, is aux 1/2 flipped or has it allways been like that, cant remember.

Just upgraded to a G4x from a G4 and need a little help getting up to speed. 1: Tried exporting wheelspeed can stream for the e46 from a file Adam had posted then tried importing the stream in my tune but when I hit apply it tells me can 1 channel 1 has a parameter that cannot be written by can. 2: PID setup, selected idle speed control, didnt show any runtime values in that window, how does it work? 3: cold start and idle works great and even accel enrichment seems to be a lot easier to work out in the g4x compared to my old g4. But for some reason when its up to temp and I turn the engine off and restart it, it will start just fine but as soon as the crank/afterstart enrichment fades out it will go super lean at idle. if I give it 0,1% throttle it will run just fine and if I keep it alive for 10-20 seconds and then let it idle it stays at lambda 1. Can cll be set to always stay on no matter what?

Made a new wiring harness and replaced any and all things related to the electrical system for the engine. Turns out the m6 bolt for the grounds to the cylinder head was loose... I now have a good reading of the voltage that tracks the cluster and my dvm perfectly.

backprobing showed 14.05 volts, so the new grounds only solved part off my problem, but since i can have the car running for awhile without destroying ignition components I logged it. seems like voltage drops when TPS move just a tiny bit. PC Datalog - 2022-12-14 7;59;11 pm.llgx bmw 320.pclx *edit* Took the ecu out of the car and bench tested it and my old g4 red, using a stable power supply. When no sensors or auxilary stuff is connected they both track the voltage perfectly in their respective pclink. This leads me to think something is wrong with the harness or a sensor. Would that make any sense?

Tried replacing the grounds today and now after half an hour on idle while tinkering with random stuff the igniters are still cold. So the ignition frying seems to be resolved but the ecu still only see around 10 - 11 volts even if the battery is att 13.3, voltage drops down to 8 - 9 volts in pclink when i give it some revs... The wiring harness is the same old harness i bought when i first got my g4 red extreme, so maybe its time to retire it and get a new one. 12 volt feeds have been replaced recently though so its wierd it shows low voltage with new feeds and grounds. and what could be the reason for the voltage drop when giving it some revs?

Checked the battery voltage and its a healthy 12.9 volts according to my DVM, the E46 cluster test menu says the same. Pierced the supply wires for the ecu and that gives the same reading. Also hooked up a 90mm² ground for the engine so that shouldnt be an issue. Still my ecu says battery voltage is around 8.5 - 10 volts and the igniters are getting hotter then Megan fox in transformers, dwell is set to 2 ms across the board so that shouldnt be a problem. I did measure the ecu ground cables and they had around 20 and 30 ohms of resistance between ecu connector and engine. Could this be the reason its showing low voltage? Watched a HP Academy youtube episode about star grounding and there was a mention of random triggering of outputs when ecu ground was bad, could that be the case? The Fueltech ignition got fried when the car was sitting with key on but engine off. This is getting realy annoying since the electronics worked great and then I pulled the motor and rebuilt it and after that all sorts of electronic gremlins are showing up.

put in a g4x extreme and another igniter got fried instantly so I'm thinking my old g4 ecu is not the problem. Replaced the ignitors and all the coils got upgraded to bosch motorsport p65 coils and also rewired all of the ignition. It started instantly and idles ok, but me being a little concerned with all things ignition at the moment decided to check the temps on the igniters and the were real hot. Even with the bosch recomended dwell times so I checked the dwell table and it seems my ecu is only seeing around 8 volts from time to time and extends the dwelltime. Could it be a bad ecu ground making it think system voltage is only 8 volts and bumping up the dwell even though the coils and ignitors are seeing 12-14 volts? I imagine that would cause the components to overheat.

So... the doomsday scenario of it running on 3 seems to be exaggerated, it thinks its an audi so it runs on 5... ign out 2 is the problem tested all out puts and 2 was dead, flipped the ignitor contacts and 2 was sparking fine and 5 was dead. same thing that happened to the FT ignition. measured ign2 and compared it to ign1 and 3 saw no difference between them. I don´t have access to an osciloscope and even if I did I wouldnt know how to use it... Any suggestion is welcome.

It matches according to the last log file I had with the FT ignitor still in the car. when the missfires started I decided that it was time to replace the crank sensor and cam sensor while I also installed pressure/temp sensors for oil, water and fuel. And now also new coils and ignitors. All cables for the ignition is twisted motorsport wire kept well away from any other wires to prevent interference. Grounds are checked and good. I just dont know what else to do. The car ran fine and then all of a sudden it decided to start frying ignition componenets.

The dwell times used was the ones suggested for the fueltech unit, after the switch to the b58 (supra/z4) coils i set the whole dwell table to a conservative 2.3ms just to make sure the coils wouldnt fry. coils didnt get very hot and I have tried to start it later now in the afternoon and its now a 3 cylinder bmw m50... one of the ignitors are fried. That and the fueltech unit getting toasted after running good for almost a year then suddenly not, makes me wonder if the ecu is on its way out. Does anyone know of a way to test it?

Hi Recently got a wierd missfire that got progresivly worse until finally 2 coils caught on fire filling the garage with smoke. The ignitor used was a fueltech sparkpro-6 and that also gave up the ghost, so I decided to use bmw z4/ toyota supra coils instead of standard M50 coils and I used 2x Bosch 0227100203 ignitors. Car started up and ran fine for about 30 min then missfires came back and the ignitors are real toasty maybe even destroyed. This makes me wonder if maybe my old trusty g4 extreme is the culprit... Anyone else had this problem?