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Old 12-03-2012, 06:59 AM   #30
NW Cascade Rider OP
Dual Sport
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Joined: Oct 2012
Location: North Cascades
Oddometer: 19

So I replaced the HES. That was a fun little project, that yielded no success. It took me about 5 min of cranking the bike before it even fired, and when it did, there was all kinds of smoke coming out the back for about the first minute. Then that cleared up, but the bike didn't want to idle well at all. So I shut it down and ended up disconnecting the TPS, and started back up. Lowe and behold it idles fine. Not the best throttle response ever (to be expected) but it idled consistently and without assistance.

So, now that I have replaced everything aside from the TPS and the Motronic control unit, I think I have maybe a bad or poorly functioning fuel delivery system, and a bad TPS. So again this weekend when everything shows up, I'm going to mount an external fuel filter, change the fuel lines, and swap the TPS. Wish me luck....
95, R1,100 GS
99, E46 323I, 2.5
05, E53 X5, 3.0
82, E24 635CSI, 3.5
Eat, Sleep, BMW.
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