Fuel diagnostic help needed

[All6ofus]

Hi all,


I have a 94 k1100rs that just developed a fuel delivery issue. 


Here's the situation:
Initial bike start-up had no issues as usual.  Riding with 1/4 tank, I noticed some jumping of the fuel gauge between 1/4 and empty and brief (1-2 min) fuel warning light that turned off and stayed off until I made it to the gas station (5 miles).  Power lag at approx 4k rpm was noticeable, and worsened as though I was running out of fuel.  Engine died as I reached the gas station, and luckily coasted to the pump!  Only 4.3 Gallons were added to fill the tank, so I know that I had about 1/4 tank remaining.  Startup after fill had rough idle for about 1 minute, but smoothed out after.  Riding back home, the power lag continued at throttle.


The bike is used a lot, never sits for long periods.  22k miles/year. 
Always gets premium fuel
No issues with performance up until today. 
Fuel pump engages and is easy to hear pre-start
Air filter replaced about 1k miles ago
No smell of un-burned/rich fuel in exhaust


Is there a step by step guide that can help me systematically resolve this problem?  I don't wanna just wing it and hope for the best.  I was thinking of starting with mechanical over electrical diagnostics  (Fuel filter, lines, etc) but I'll take any advice that y'all are willing to give.


Thanks a bunch!


[size=78%]  [/size]

[johnny]

greetings...

id do 1 2 3 here before anything else...

im betting its the 4 pin...

j o

[Martin]

As stated the four pin plug is a known source of problems and can be intermittent. Check the fuel filter, visually check for water and or crap in the fuel.  Drain if necessary and replace filter if water or debris is found.
Regards Martin.

[All6ofus]

Sounds great, I'll start with those and post results.  Thanks so much!

[All6ofus]

HELL YES!!!!


The connector cleaning did the trick!  The Mistress is back in action.  [/size][size=78%]Now if ALL of life's problems were that easy to fix.[/size]




Thanks a million, so glad I reached out rather than screw it up on my own!

[Martin]

 :2thumbup: Deoxit is a Brickers best friend. It is a good idea to go over all the electrical connections and Deoxit them. I then put dielectric grease on the connectors, the theory being that the grease will keep out the moisture and air which leads to corrosion. However some Brickers believe putting dielectric grease can insulate the connections leading to problems. It's up to you, but I have had my Brick for coming up to twenty years in a Sub Tropical environment and have not so far had any problems, I could just be lucky?  :dunno
Regards a slightly moldy Martin.

[All6ofus]

Slightly moldy... lemme guess, Oregon? 

Sent from my SM-G900T using Tapatalk

[bocutter Ed]

Slightly moldy... lemme guess, Oregon?

That, or him and the wife have been making aspic downunder.

[Martin]

Just the weather plus heat equals humidity.
Regards a drying out Martin.