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You have to swap the BCU along with the ECU and after you reconnect the battery turn the ignition switch on for 20 minutes and let it sit there to resync the IDM. If you move the truck no Domino's will start flashing unless you have a new instrument cluster, correction matching instrument cluster to go with the ECU and BCU
I installed the loaner ECU from TWS on Saturday morning. Performance tune (don't ask me what/how), so it really woke the engine up! Better throttle response and, from a SOTP standpoint, feels like even more oompf - especially off the line. Idle still seems a little rough, but no more codes. Up to about 8 key cycles and 100 miles - so far so good. Needless to say, ordering a new ECU from TWS - "for off road use only".
Because I am in CA, I need a stock ECU for passing smog testing. I plan on buying one from Goldwing Rovers. Can I use a Nanocom to program in my VIN? If so, does anyone have experience with this?
Oh, and this just happened. This thing definitely runs and looks better than new!
I drove down to SoCal last week and connected with Abran to help me program the VIN/handshake a replacement stock ECU I got from Goldwing Rover Parts to see it that would resolve the issue. Same thing - multiple misfires on all cylinders while idling. Otherwise, she runs very smooth and strong.
While in SoCal I was running AC more than usual and noticed no misfire codes. AC on = slightly higher idle = no misfires. AC off = lopey idle = misfires.
I drove down to SoCal last week and connected with Abran to help me program the VIN/handshake a replacement stock ECU I got from Goldwing Rover Parts to see it that would resolve the issue. Same thing - multiple misfires on all cylinders while idling. Otherwise, she runs very smooth and strong.
While in SoCal I was running AC more than usual and noticed no misfire codes. AC on = slightly higher idle = no misfires. AC off = lopey idle = misfires.
Ran AC during the smog inspection - PASSED!
By way of clarification, misfire codes are being produced, but there are no actual misfires in the cylinders. The jerky motion of a lopey idle at the flywheel is picked up by the crank position sensor as timing differences between teeth of the reluctor wheel. Then the ECU logic sets the misfire codes, based on timing differences. In this case, the engine is not actually misfiring, rather the logic that sets the codes is not suited to the new cam set up at low idle RPMs.
Glad you found that the A/C idle-up was enough to get you over the hump. Perhaps there's a way to wire in a switch or jumper to make the ECU think the A/C is on all the time.
