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pazi88 / Speeduino-M5x-PCBs

Speeduino compatible m5x PnP PCBs
GNU General Public License v2.0
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knock on idle M50 hall sensors #25

Closed dobrik closed 2 years ago

dobrik commented 2 years ago

Hello! I have m50NV with m50TU ECU (bosch 413), wiring and sensors. I've soldered speeduino ECU using your PCB design v2.3. I wanted to use VR-conditioner but now it's really hard to find max9926 in my country. I decided to use HALL type sensors crankshaft and camshaft. Also I checked pinout of bosch 413 ecu and payed attention that camshaft sensor is hall effect by stock, pin checking of this sensor with stock ecu connected confirmed that, 1 pin 5v, 2 pin 12v, 3 pin ground. Crankshaft sensor I use Eps 1.953.082 cut it to make it fit with stock install place and connector and pinout changed according to connector output with speeduino connected 12v - VCC, 5v signal, ground.

I've connected all jumpers and soldered all components for M50TU according to your "Jumper configuration" text document, but JP31 was remained connected to 1-2 because if I connect it to 2-3 my camshaft sensor will be connected to nowhere.

I adjusted engine constant required fuel, injector characteristic, temperature sensors and Wideband sensor, compared ignition table with stock. Changed Idle PWM to put down RPM to 650, adjusted VE to have 14.7 on idle.

My issue is when engine starts and RPM is high and goes down to 650 for some time engine works fine, after few small accelerations to ~2500 on RPM falling to idle I noticed falling to 550 and aligning on 650, then I exactly hear knocking but AFR is 14.7 and spark angle is ~15 that corresponds stock ecu value. Even if I do not accelerate periodically heard knocking. If I pull up idle RPM to 800 as example knocking stops. On accelerations I also do not notice knocking but it could be because of loud exhaust. Two or three times I payed attention on RPM arrow on car dash it jumped up for 2000 RPM, but crank sensor installed correctly and on appropriate distance from decoder. I saved a logs, could you please take a look on it? engine was started and stopped in this log file. 2022-08-18_19.51.15.csv 2022-08-18_11.36.02.zip

dobrik commented 2 years ago

Also tooth logger file. 2022-08-18_19.50.03.csv

dobrik commented 2 years ago

False alarm. Noise that I heard was from power steering. This time starting cold engine was unsuccessfull. I fixed it changing distance betwen decoder and crank sensor from 1.6 to 0.7-0.6 milimeters. Also I steel see sometimes jumping of RPM arrow, but I guess it's my dash broken, because tuner studio shows correct values and there no any anomalies in engine work. Sorry for disturbing, hope this topic can help someone.