I agree. This sounds more like an injector or fuel problem. Do you have a Power Commander?
Got Luci back from the shop
- Thread starter BusaWhipped
- Start date
She has new plugs, filter was checked with the fuel system. I don't know about the coils.
I'm thinking out loud here and could be wrong but I've had mysterious electrical problems on airplanes before related to heat. Increased heat on a component would cause high resistance and therefore cause intermittent electrical problems. Does it happen as soon as you crank up the bike or does it start after it is warmed up?
Does it just run out of steam or does it start to break up/backfire @8500? Did the dealer verify fuel pressure @8500 rpms and UNDER FULL LOAD? Fuel pressure maybe find at idle and low loads, but fail to keep up with fuel demand above 8500 rpms and under load.
The only safe way I know to verify fuel pressure is to take it to a dyno, and have a wideband verify AFR when the bike starts to lay down. Having a fuel pressure guage installed would also be a good idea. I used to work on cars, and the only way to verify a bad fuel pump/fuel supply issue was to drive the car with a fp guage installed that you can see while driving. Not a good idea on a bike, at the speeds you are seeing the problem.
The only safe way I know to verify fuel pressure is to take it to a dyno, and have a wideband verify AFR when the bike starts to lay down. Having a fuel pressure guage installed would also be a good idea. I used to work on cars, and the only way to verify a bad fuel pump/fuel supply issue was to drive the car with a fp guage installed that you can see while driving. Not a good idea on a bike, at the speeds you are seeing the problem.
This is where we would start. If this all checked out,we would look at coils,and down to the computer from there.I would emagine this is something simple.We have not been stumped yet!
How about this test for the dealer? 1) Unscrew 8 bolts. 2) Replace two exhaust cans. 3) Screw on 8 bolts. 3) Test.
I didn't want to pay them for something I can do that easily.
It just runs out of steam. No backfiring or missing, just no power. They tested the fuel system following Suzuki procedures, whatever they are.
Sorry, BW ... I just figured they might have done it for you to figure it out. If you were here in Philly, you could borrow mine to check it out. Anyone nearby that you could borrow them from? And if it's not the problem, drive it down there and show them?
Cold and rainy here
I'm tuning the suspension today by the numbers, but won't be able to take her out to test.
watch out for the cold roads.
Especially when they have a thin layer of ice on them
Dennis...
1. i agree that "the drilled can theory" is utter B.S.! and typical of dealer mechs who.."can't find it".
and?...
2. imho?...if it's not a fuel pump/pressure related issue?...the next place to check would be your "Tank Vent"...even a partially clogged tank vent can have this very affect at the upper revs....where the most demand for fuel is..and the clogged tank vent causes a negitive presure lock cause it can't let the air in fast enough to let the fuel out.
and this is coming from a guy...
that was "here"...
with you...
L8R, Bill.
1. i agree that "the drilled can theory" is utter B.S.! and typical of dealer mechs who.."can't find it".
and?...
2. imho?...if it's not a fuel pump/pressure related issue?...the next place to check would be your "Tank Vent"...even a partially clogged tank vent can have this very affect at the upper revs....where the most demand for fuel is..and the clogged tank vent causes a negitive presure lock cause it can't let the air in fast enough to let the fuel out.
and this is coming from a guy...
that was "here"...
with you...
L8R, Bill.
Last edited by a moderator:
oh..and ps....riding like this...
http://www.photoreflect.com/pr3/AlbumSlideshow.aspx?a=324283
in the wet!
L8R, Bill.
http://www.photoreflect.com/pr3/AlbumSlideshow.aspx?a=324283
in the wet!
L8R, Bill.
Last edited by a moderator:
suzuki4life
Banned
breaking up at 8.5k rpms.
I would check the plug gap, then coils, then cam timing. Then if all was good I would swap ECU's.
I would check the plug gap, then coils, then cam timing. Then if all was good I would swap ECU's.
Thanks Bill. Since I swap tanks back and forth on the bike, I may have kinked the vent tube.Dennis...
1. i agree that "the drilled can theory" is utter B.S.! and typical of dealer mechs who.."can't find it".
and?...
2. imho?...if it's not a fuel pump/pressure related issue?...the next place to check would be your "Tank Vent"...even a partially clogged tank vent can have this very affect at the upper revs....where the most demand for fuel is..and the clogged tank vent causes a negitive presure lock cause it can't let the air in fast enough to let the fuel out.
and this is coming from a guy...
that was "here"...
with you...
L8R, Bill.
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