Hello,
I am going to install Vems on Renault 4cyl, 16v engine.
Most of them have 60-2 primary trigger pattern.
- VR, HALL is very common.
- measure for each sensor: if you find 2 pins that measure same resistance in both directions (typically between 300..1400 Ohm), that is VR sensor. Otherwise HALL.
Collect some info (specific engine code, year, ...)
Engine is F4R730, Clio RS 172, year 2000. Specification is:
- primary trigger - VR 270 ohm resistance, 60-2 trigger pattern
- map sensor - Vdo 20-100kpa, 520-4780mV
- camshaft phase shifter - on-off type, 7.5 Ohms
- injectors - marelli, hiZ, 14.5 Ohms
- Iat sensor - ntc, 1500 Ohm at 25C
- Clt sensor - ntc, 2200 Ohm at 25C
- engine is standard, only decat, compression ratio 11:1, max power at 6250 rpm
I will try to organize this chronologicaly because this is my firs vems expirience. I dont know what is around the corner and therefore this is a lot easier way.
V3.8b has arrived in late November. Ordered from www.vems.hu. Nice communication, very fast shipping...
I already have some experience with engine management systems, but this is my first vems. No doubt i will need help and support. I started with studying vems tune options. After that i downloaded V3.8 board schematics and other available documentation. It took some time, so board assembleing started on 1st December 2015.
I have some doubts about flyback, sck pullup on V3.8b board and main supply.
Lets go on flyback first.
Can you help me and define which solution is applied when V3.8b is purchased as preassembled with 30V flyback?
I have found two solutions. I am not sure which is right.
1. Only 1K5E30V diode from flyback pad to ec36/pin23.
2. 1K5E30V diode + capacitor (light red one wima mks 4 4.7 uF 100 - 10% which comes with recue kit, probably noise filter but i am not sure) between flyback pad and ground + ground reinforcement. Like on this link, third picture. http://www.vems.hu/wiki/index.php?page=MembersPage%2FCsotiF%2FGenboardassembly
Is ground reinforcement essential or optional?
About sck pullup on isp header. Is it optional or essential on V3.8b board? It didnt came soldiered on board.
Is main supply on V3.8b preasembled? Diode and ptc fuse were soldered od board. It seems nothing else is needed.