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Mar 14, 2019 19:10:36 GMT
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Ive got my bmw e36 now using microsquirt ecu, its a volvo engine, but its running with all bmw sensors on it. I'm having problems with the crank sensor not reading properly, its caughing and banging when running and gives up at 3k and stalls.
I'm pretty sure its the crank sensor not reading properly. Has anyone had this before? Is it a common thing?
thanks
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Mar 14, 2019 19:42:30 GMT
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thanks for the reply, i didnt mount the sensor, i had the motor built by a guy who really knows what he is doing. The car was meant to be running a bmw ecu and getting it remapped but i decided for one reason or another to use the microsuirt. It was running and driving ok with the other ecu but wasnt tuned at all.
Is there any difference in the ecu sensitivity? As in its got a gap of about 1mm, would it be any different with the micro squirt?
I'm really stuck so any ideas would be really helpful
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Mar 14, 2019 20:55:25 GMT
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the microsquirt has 2 wires in twin core that come out of the ecu, and there is 2 sensor ground wires, one of the 2 wires ive used only for th e crank sensor, and the other one for all the sensors like tps, coolant etc. Now, It reads all the sensors ok in tuner studio, also can see the engine turning over, gives an rpm..
Guy who sells megasquirt in america has said on the msextra forum that he can see cranks sesnor problems on a data log i did. But i don't really know what I'm doing with the log, and its taking far too long for his replys.
I want to do a rally next weekend with the car!!!
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Mar 14, 2019 22:26:43 GMT
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the microsquirt has 2 wires in twin core that come out of the ecu, and there is 2 sensor ground wires, one of the 2 wires ive used only for th e crank sensor, and the other one for all the sensors like tps, coolant etc. Now, It reads all the sensors ok in tuner studio, also can see the engine turning over, gives an rpm.. Guy who sells megasquirt in america has said on the msextra forum that he can see cranks sesnor problems on a data log i did. But i don't really know what I'm doing with the log, and its taking far too long for his replys. I want to do a rally next weekend with the car!!! I'm not a fan of microsquirt by any means, but from what I remember there is only one sensor ground wire (black and white iirc). The shielding for the cam and crank sensors should be connected to that, the other 2 sensor wires go to their own pins on the ecu. Are your crank sensor wires using the shielded cable? And the cam also?
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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Mar 15, 2019 10:07:12 GMT
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I checked the pin out if he ecu and I’ve misread that one is sensor ground and one is another ground
Will try it at dinner time , thank you so much for the help !!
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Mar 15, 2019 15:25:01 GMT
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It Wasn’t that both wires labelled sensor ground and did swap them
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Mar 15, 2019 20:10:17 GMT
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One is sensor ground, the other is serial ground.
But you only need the shield wire connecting to sensor earth, what pins are you using for the crank sensor?
You are using the v3 version, or another?
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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Mar 15, 2019 20:30:43 GMT
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It is version 3 its from here this oneso now all sensor ground are connected to pin 20 i think it is, i think i had crank sesnor to pin 18, and the pin out says not connected! It did fire with it that way, and its no different now with them all wired together... then the other 2 wires are yellow and green in a grey shielding, pins 32 and 33. they are wired white from pin 20 now, the yellow in the middle pin and green on the other outer. The crank wire, the shielding, its just there not connected to anything, ive taken a wire from the sensor ground group and taked it on the outside of the grey shielding.. could that be what ive done wrong too?
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Mar 15, 2019 20:49:32 GMT
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Pin 18 doesn't do anything, ignore that one.
All sensor grounds AND the shielding of the grey cables is connected to pin 20.
Pins 32 and 33 should be your crank sensor, which should be the two wires inside one of the shielded cables.
Pins 4 and 21 should be the cam sensor, which go inside the other shielded cable.
Pins 22 and 23 go to the engine block ground, Not to battery negative.
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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Mar 15, 2019 20:57:33 GMT
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Its a volvo 8v single cam B230, so its only running crank, throttle, coolant, map, air intake temp sensors.
Ill connect the grey shieling tomorrow and see what happens.
2 black wires for the ecu earths to the engine block yes.
thankyou mate for the advice.
Its something ive done i think , and maybe not putting the shielding to earth is one of the things hopefully!
I'm taking a strobe with me tomorrow and see where the timing is at if it is regularly firing
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Mar 15, 2019 21:08:56 GMT
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What crank sensor are you using?
What tooth pattern is it looking at?
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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Mar 15, 2019 21:11:29 GMT
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Its the bmw m44 one, its 60-2 pulley from a m52 mounted on the volvo engine. It did have a m44 ecu on it and it was running fine it was driving ok, but needed mapping, for one reason or another i went to microsquirt.
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Mar 15, 2019 22:12:07 GMT
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The shield wires are important, see how she runs with those connected.
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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Mar 15, 2019 22:14:39 GMT
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will try tomorrow thankyou...
Its romerlite rally next weekend, and i want the car to be there, i know it wont be, but ill try anything to get it right...
thankyou so much for the help
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Mar 15, 2019 22:57:35 GMT
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You'll get it sorted for the rally I'm sure, I know the feeling as I've got silverstone on the 24th.
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1988 Mercedes w124 superturbo diesel 508hp 1996 Mercedes s124 e300 diesel wagon 1990 BMW E30 V8 M60 powered! 1999 BMW E46 323ci project car
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Thanks ! Just doing it now pins 18-20 have continuity with the fluke !!
Going to wire them both together and the earth tio
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Wired it back in and I’m only getting a spark at no.2 and not the other plugs with the strobe . It’s firing once ever other turn if the engine
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Last Edit: Mar 16, 2019 9:25:42 GMT by bmw2101
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Mar 16, 2019 20:13:48 GMT
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first of all thanks for the replies, really helpful!
So, here is what it is and has happened.
Engine is volvo b230a with bmw m44 sensors on it, its in the e36 compact, its on a is200 6 speed box too [for interest] . Now, its running crank sensor, air temp, water temp, tps, all from the m44, and a gm style ebay 3 bar map.
Now, i originally had it in my head that the bmw m44 coil packs where like cop, and in the limited experience i had, thought it was just a little trigger it needed and the ecu would earth out the coil to fire. SO i put the m44 coil wires on pairs, then went to the microsquirt switches for the ignition and tried it. It didnt fire, so i went to a ford coil pack. 3 wires in, trigger, 12v live, and trigger wires. That didnt work, so i looked harder in teh instruction manual, and i found that i need this ignition amp.
So, from then it fires and maybe starts, but dosnt run at all well, mainly will only run with throttle wide open, its banging out of the exhaust and inlet.
So today, took the strobe, could only see pulses on no.2. Went home. then later went back when my mate said to try again and do a data log. So i took the plugs out, cleaned them, and turned it over, all 4 where firing!!!
I thought it would fire in pairs, but didnt seem to do that, only one as a time. That now is making me think as its wasted spark.
I did a data thing, it can see cranking the pulses from the sensor, i had it on falling edge, changed it to leading as i was getting a double pulse, and now i get one single big spike.
I have tried playing with the strobe and looking at tdc, and it seems to be 10 degs off when you select static timing and 0 degs.
Now still not sure what to do. maybe its the coil packs.
ALso the plugs have got wet a few times, and seem to coke up easily now, so ive ordered a standard set.
What to do next i don't know, ill upen my laptop and see the if the pulses file has saved off and look again.
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Mar 16, 2019 20:25:18 GMT
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