The crank position sensor

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Sep 15, 2009 | 03:19 PM

#21

redbone62

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From: sin city nevada

ya i just had a fuel pump replaced a month ago and think thay replaced everything in the tank including the quick conect and hose to it

Sep 15, 2009 | 03:35 PM

#22

wctom

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From: Leesburg, FL

I replaced my CPS on my King a couple of months ago. The bike would start right up in the morning, but once it got hot, it would start backfiring as I slowed down. It also ran a little rough. I had no clue what the problem was, then we stopped at a gas station one day after riding most of the day. Couldn't get the bike started until it cooled down. Then as the bike heated up again, running rough and backfiring. A little time on Google and I decided to spend the $57 and change out the CPS. That was it, all fixed. Well, at least until the VSS went out about a month ago. All in all, the same type of sensor. I understand that these sensors have a history of going bad.

Sep 15, 2009 | 06:53 PM

#23

rbabos

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From: Woodstock, Ont , Can

A crank sensor should emit a voltage pulse across the leads when the engine is rotated. Anybody know what it is on the Harley CPS. Others I've read about are in the 2-5 volt range.
Ron

Sep 16, 2009 | 05:12 PM

#24

man4mopar

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From:

Quote:

Originally Posted by rbabos

A crank sensor should emit a voltage pulse across the leads when the engine is rotated. Anybody know what it is on the Harley CPS. Others I've read about are in the 2-5 volt range.
Ron

According to my dyna manual they require a minimum 1 volt AC while cranking. Also lists a ohm range of 600-1200 if fails either first check for loose fit of sensor, last make sure end is clean of debri. If it failed to produce 1vac and or ohm out of the 600-1200 range is tightly installed with a clean end to replace the sensor. I would bet the B motor in the softies are the same spec but may not be.

Last edited by man4mopar; Sep 16, 2009 at 05:17 PM.

Sep 16, 2009 | 08:08 PM

#25

redbone62

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From: sin city nevada

yep just spent 88 bucks on cps and system relay and starter relay the good news i now have all three spare parts due to that dident solve i fricken problem

still square one i think fuel pump or regulator not getting enough pressure to injectors and all this is new 88 miles ago im pisted off anyone ever get a pert from harley and afeter a month or so go bad? are thay fair and take care of it or just say screw you ??? i dident have them do the work my buddy has a cycle shop he did the work i bought the parts?

Sep 16, 2009 | 08:50 PM

#26

jimmers1817

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From: NJ

Quote:

Originally Posted by redbone62

yep just spent 88 bucks on cps and system relay and starter relay the good news i now have all three spare parts due to that dident solve i fricken problem

What made you think it was the cps anyway?. Didn't seem to fit since you had spark.

Sep 16, 2009 | 09:10 PM

#27

redbone62

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From: sin city nevada

i hear of them going out and still having spark

Sep 17, 2009 | 03:14 AM

#28

texas_speed_freak

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Joined: Jun 2008

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From: Ft. Worth, Texas

Quote:

Originally Posted by redbone62

i hear of them going out and still having spark

+1 on that. the cps tells it when to spark. it can be sparking and still not fire if it is reading incorrectly and sparking at the wrong time. thats why it will be very hard to start or start and not run correctly once started. also pick up metal and not work correctly