I run 2 of these in my Q and Z. The symptom you describe is a usually a coolant temp sensor problem.
Poor or open circuit cts signal will blow black smoke and make it run V poor and foul plugs .
Check the cts connector under the throttle body the one with 2 wires the other does not talk to the pcm.
Can you use a multi meter. If so check the resistance values of the sender both from the wires and from the pins (to find a connector problem ).
Hope this helps