Author Topic: Fuel Consumption Through The Roof!  (Read 2814 times)

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July 31, 2013, 03:52:52 PM on

Offline Fe Man (OP)

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Many of you will remember my woes with spark plug bits bouncing around and damaging a valve; well all is repaired and the bike runs great. Mostly.

Upon cold start-up, it idles roughly and most often dies unless I give it some throttle. Once it's warm it seems fine! I was riding in the mountains with my wife on Sunday, gravel roads, mostly slow speed stuff. The tank should have been good for 250+ miles but I ran out of gas a 176.6 miles and this was the second time in a row I had sub 200 mile tanks!

Thoughts?

July 31, 2013, 04:31:46 PMReply #1 on

Offline Mustang

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have you tried reloading the FI map...............

same head with new valves , from the spark plug episode ?
you could have bad valve seats on the cylinder with replaced valves .

the rough running and idle is certainly due to being far too rich , I would assume .

July 31, 2013, 04:58:45 PMReply #2 on

Offline Fe Man (OP)

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Same head, replaced 1 bent valve, valve seat was perfect. I'm thinking the TPS may be causing issues.

Guess I'm going to have to buy the necessary bits to reload FI maps , tuneboy, whatever...

July 31, 2013, 05:38:39 PMReply #3 on

Offline Mustang

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Wouldn't hurt to check your clearances on the valve /valves that you replaced ..........might need a readjustment .
could be at zero clearance and causing excess fuel use .
would save you some $$$ if that is the prob . or it could well be that replaced tps is not set correctly , in which case TUNE ECU and the cable to connect to your tigger is what you want to blow in a new map and set the tps.
Lots of info on here and a couple of members are very knowledgeable about it .

July 31, 2013, 08:17:44 PMReply #4 on

Offline Bixxer Bob

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Yup, no need to buy Tuneboy,  TuneECU is free but you need to spend about $10 on a cable.  Just look in the stickies, it's all there.

I've had roughness and cutting out at idle for a couple of weeks; got round to re-loading the map and resetting the TPS today and she's fine again.  If you are going back in to check the valve clearance, balance your throttle bodies while you're on.  I keep saying it, but it's the single best  thing you can do for a rough running Girly and nearly the easiest.

And I know your miles are shorter than ours but 176 doesn't seem too bad.  I get 180 - 200 English miles to a tank before the light comes on (except it doesn't, another job on the long list)

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August 01, 2013, 03:19:15 PMReply #5 on

Offline HockleyBoy

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A lot depends on how you ride it as I found out recently, I was getting around 175 to 180 miles between fill ups on my daily commute. Following an incident with the local constabualory I am now having to ride like an old lady and I now easily get 240 miles from full to light on (20 litres of petrol). Every cloud etc  :icon_cry:
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August 01, 2013, 04:25:26 PMReply #6 on

Offline Fe Man (OP)

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Valve was lapped and adjusted to the loose end of the range; I doubt it has made it to zero in 1000 miles.
The TPS sensor has not been replaced; just suspect.

The bike has always gotten over 200 miles on a tank as I really don't ride it that hard; sometimes over 250 if I'm riding low speed off road. The only reason I ran out of gas is because the fuel sender has gone wonky and now the bike is out of fuel before the light comes on.

August 01, 2013, 08:59:16 PMReply #7 on

Offline Mustang

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Valve was lapped and adjusted to the loose end of the range; I doubt it has made it to zero in 1000 miles.
have seen that exact scenario and the valves pounded right into the head and went zero clearance in under a 1000 miles ...........just sayin .

September 23, 2014, 02:30:04 AMReply #8 on

Offline Fe Man (OP)

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I haven't ridden in quite some time due to work on such but I still haven't sorted this out. Still running rich from what I can tell. TPS was replaced though.

I'm outta the zone here!

September 23, 2014, 03:09:14 AMReply #9 on

Offline Fe Man (OP)

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Gonna check the valve clearance tomorrow and order the TuneECU cable. If I can't sort it out I'm gonna sell the bike!  Cheap!!!

September 24, 2014, 05:49:28 PMReply #10 on

Offline metalguru

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Were the Throttle Bodies balanced EXACTLY?
Also if the battery was left connected and went flat during the rebuild, the map will need a refresh and TPS reset. Good to do if an imbalance has taken place.
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