325i engine hareness into 325e help.

[BoostMW]

HI, I have swapped an engine harness from a 87 325i into an 87 325e,I just plugged it in and fired it up,it was fine at first but the next day the tack is cutting out after a few seconds along with the mpg gauge,fuel gauge inop also. ...

Should I have swapped some pins in the C101?

[slo325i]

I actually would like to know this as well. My speedo is just dead and so is my mpg gauge.

[TopOfTheLine89]

I had to run a wire from the c101 plug to a wire in the glove box on my 87eta when i did the swap.

[Spinning Tires]

I actually would like to know this as well. My speedo is just dead and so is my mpg gauge.

i had that problem once. changing the cluster fixed it. speedos go bad often and they control the mpg

[Court M3]

check the speedo reference sensor in the diff. If all other gauges work.