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Turbofrog
 
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Join Date: Aug 2009
Location: Europe
Posts: 1,377
There is an internal fuse for 12V and 5V inside ms3pro. They are 500mA and blow easily if there are any shorts on vref wires. Bad TPS or ICV are most common sensors that can short internally and cause fuse POP. No wonder my TPS was funky. I should remove it and test the resistance but now that the car drives I rather just drive it : )
My only concern is why it popped the main fuse when the TPS and ICV both where disconnected (with no 5V fuse)?

I have it wired just like the ms3pro manual shows.

BTW my off throttle is now much better with MAP AE only than it ever was with TPS AE. Only thing I miss is overrun but its not bad either as those cells are around 16AFR.
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79 930: HX40S#16, MS3pro+ID1000+044+E85, Ignition: 123/TUNE/MSD6A, True split BB, 2*turbosmart38
Old 09-18-2017, 07:47 PM
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