Help with building your Speeduino, installing it, getting it to run etc.
By Logicaluk
#68060
Yes I finally found the time to get the Speeduino back in the car, it worked fine on the bench, but the crank signal seems to have issues in the car, according to the data logs it seems to have been getting a big pulse from somewhere, causing a miss fire.
Crank sensor is a VR through a PSIG conditioner
Can anyone see something I've missed?

Dan
Attachments
(33.62 KiB) Downloaded 12 times
(40.01 KiB) Downloaded 15 times
(113.8 KiB) Downloaded 12 times
(120.69 KiB) Downloaded 9 times
(90.78 KiB) Downloaded 13 times
User avatar
By jonbill
#68063
How do you mean a big pulse?
Your TPS is nailed on at 34.5 and your MAP barely gets below 90 and your CLT and IAT are both showing 191.
Have you calibrated your sensors?
How open is the throttle?
User avatar
By PSIG
#68064
Hi. Short on time so straight to first things - your GammaE is spiking (view in MLV), but not sure of which cause.
  • Your cranking threshold is 750, so it thinks it's cranking under that. Reduce threshold to below any expected running rpm.
  • IAT/MAT is all over. Fix and calibrate that.
  • MAP is consistently high kPa. Fix and calibrate that for correct readings, or if it has ITBs, switch to AN or Blended AN.
  • If the signal conditioner is DSC, your crank sensor polarity may be backwards. Switch wires and take tooth log to see if the 2nd gap signal is reduced.
  • If the signal conditioner is MiniMax-A2, try changing to Rising edge first, then try reversing sensor polarity. Find smallest 2nd gap signal.
Gap trigger - polarity.jpg
Gap trigger - polarity.jpg (14.88 KiB) Viewed 477 times
By Logicaluk
#68066
The crank and map are the only sensors connected.

I'm running a DSC conditioner, I did switch the sensor polarity but didn't take a log,

Im currently running resistor plugs and leads as I didn't have any non resistor plugs to swap them out, when I installed the VW coil pack.

By big pulse I mean, when I'm watching tuner studio, the rev counter jumps or flicks up high and the engine stumbles.
Dan
By Logicaluk
#68182
Once again PSIG, thank you.
Note this is set up for monitoring only at the moment. next step is ignition only.

Crank sensor issues turned out to be a broken wire, wired one way it ran with the double pulse in the ignition log. Wired the other, it did nothing.

5V reg replaced and TPS calibrated, temp sensors reset to Bosch, but only MAT connected, no CTL.

I can't get a longer log as the head gasket has gone, so I'm off to pull the head off.

Thanks
Dan
Attachments
(95.12 KiB) Downloaded 5 times
(172.44 KiB) Downloaded 5 times
(143.92 KiB) Downloaded 5 times

I saw this suggested on GitHub. I've used programm[…]

BMW E23 M30B28

Ignore my previous posts, I'm an idiot. Turns out […]

He's quite prolific with respect to video and elec[…]

I’m thinking it’s the voltage regulato[…]

Still can't find what you're looking for?