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Cooling fan and fuel setup?

Started by The Architect, May 28, 2011, 05:52:25 AM

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The Architect

May 28, 2011, 05:52:25 AM Last Edit: May 28, 2011, 06:04:46 AM by The Architect
So I've been having a few issues with my 01 ST4.  (It's the 916 engine.)  The previous owner, at the time of purchase, had DP cans and a DP chip added .

It runs rich and has a flat spot around 5-6K rpms.  Last spring I took the bike to get tuned and it didn't help.  Ducvet tried to adjust the fuel but kept getting weird results; I don't remember what the results were but I remember something like the bike is running rich and lean at the same time.  It was a major improvement but it's still not right.

Also the cooling fan won't go on matter how hot the water temp gets.  The fan does go on briefly when the key is turned on.  The vertical cylinder temp sensor had some minor corrosion around it.  So my thought was that the vertical cylinder temp sensor was bad and the ecu would think the bike is cold causing it to run rich.  I replaced the sensor with no luck.  I swapped the wires from the vertical and horizontal sensors with no luck.  Vertical sensor works because the temp reading on the cluster shows up correctly when the wires were swapped.

Also when the bike was hooked up to the computer I asked him to test the cooling fan.  The fan didn't appear on the software.



My thoughts:  there is an issue with the chip but what are the chances of that.  Has a chip ever gone bad?  Or the ecu is done.

Are the two related? 

Any ideas?

ducpainter

#1
May 28, 2011, 06:03:10 AM
I'm thinking ecu.

That is what controls the fan...along with the sensor and also controls fueling...with the chip.

ecu's go bad more often than chips, and the fact that Eric couldn't adjust the fueling....
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Howie

#2
May 28, 2011, 11:39:35 AM Last Edit: May 28, 2011, 11:41:14 AM by howie
The problem with ECUs is the one thing they cannot diagnose is themselves.  You need to eliminate all other causes first or substitute a known good computer.  You will need a wiring diagram.  If you get an input from the sensor at the pin going to the computer and the circuit from the computer to the fan is complete the computer is the most likely villain.  Oh, though the fan is activated by the computer there is still a relay in the circuit that needs to be checked.

2nd oh!  I agree with Nate about the fueling.

The Architect

#3
May 29, 2011, 03:54:03 AM
So I spoke with Eric yesterday when I dropped off the bike.  The fueling is simple.  The stock chip was lean throughout the whole range.  So for the DP chip they just richened it through out the whole range which isn't always a good thing.  And the DP chip doesn't allow for adjustments.  Where a chip like an FIM allows you to make adjustments.

Fingers crossed that the chip will correct the fan. 

ducpainter

#4
May 29, 2011, 04:28:50 AM
Quote from: The Architect on May 29, 2011, 03:54:03 AM
So I spoke with Eric yesterday when I dropped off the bike.  The fueling is simple.  The stock chip was lean throughout the whole range.  So for the DP chip they just richened it through out the whole range which isn't always a good thing.  And the DP chip doesn't allow for adjustments.  Where a chip like an FIM allows you to make adjustments.

Fingers crossed that the chip will correct the fan. 
So you're going with an FIM chip?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


The Architect

#5
May 29, 2011, 05:14:19 AM
Quote from: ducpainter on May 29, 2011, 04:28:50 AM
So you're going with an FIM chip?

It's on the list of possibilities of repairs.  High on the list.

ducpainter

#6
May 29, 2011, 05:16:23 AM
Quote from: The Architect on May 29, 2011, 05:14:19 AM
It's on the list of possibilities of repairs.  High on the list.
Is he doing a service too?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


The Architect

#7
May 29, 2011, 11:00:12 AM
Quote from: ducpainter link=topic=49431.msg903093#msg903093 date=130javascript:void(0);6671383
Is he doing a service too?

Valves and fuel filter. 

Friggin 4 valves!     [bang]

ducpainter

#8
May 30, 2011, 04:59:37 AM
It gets pricey.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


The Architect

#9
June 14, 2011, 06:51:21 PM
Getting to the bottom of it, slowly.

A fuel line in the tank had a split in it.  Which explains why the bike is running rich and lean.



And only one rocker arm needs to be replaced,  [Dolph]   [bang]. 

The Architect

#10
July 02, 2011, 04:42:43 AM
The chip was bad.

New FIM chip and the bike has never run better. 

ducpainter

#11
July 02, 2011, 04:52:14 AM
Quote from: The Architect on July 02, 2011, 04:42:43 AM
The chip was bad.

New FIM chip and the bike has never run better. 
How much is a new chip? so when I finally get the cams he's trying to talk me in to I'll know how much the required chip will be...
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


The Architect

#12
July 02, 2011, 07:37:47 PM
Quote from: ducpainter on July 02, 2011, 04:52:14 AM
How much is a new chip? so when I finally get the cams he's trying to talk me in to I'll know how much the required chip will be...

I don't remember the exact amount.  $150+/-.  That doesn't include the fuel setup after.

But what a world of difference.  1st gear power wheels are easy.  I need to be more careful  ;D

New cams?  What the tractor's torque isn't cutting it?   ;D  He's usually right which is bad for our wallets  :-\.  He keeps dropping the 853 kit hints.  In fact every time I ask him a question about the 748 motor, the answer usually is accompanied with "an 853 kit would solve that."   
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