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CedarPerformance CedarPerformance is offline
Junior Member
Posts: 116
Join Date: Aug 2017
Car: All of 'em
Default 09-10-2017, 05:40 PM

Originally Posted by neuroclast
Well I'll go pick up a USB to serial cable tomorrow and find out for sure, but I have a hard time swallowing that EMI is causing the jb4 to switch Maps to 0.

I also tried moving the jb4 inside the DME box and got the same results.
Sorry boss, spending time with Family I didn't see the map switching part. What vehicle have you selected? Terry will know best but I use n54 E series on the n/s63, double bank o2's, e chassis, seems to make sense.

Switching to an invalid map is interesting... We will have to wait for Terry to hear on that. Sounds like you are triggering a switch to Map 4 some how, either lean or over boost or whatever, and there is something going on there, so it is kicking to map 0. Can you select map 4 on your own with no problems?

I would reflash your jb4 with a laptop instead of Bluetooth, to be sure all hex is perfectly flashed. Then try to dial the tune after that. Logs will help too brother. Sorry for the half-ass support, like I say d, Sunday family day!
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