Grand Prix 125
Main Motorcycle: 2008 bonneville
Join Date: Dec 2012
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Is there a simple way of testing the fuel system at all?
Would the header-wrap cause the egt's to rise at all in the pipe itself, sending the wrong message from the o2 sensor to the ecu?
JRL89...You were the owner to install the K&N Pods/Filters correct? Your bike ran fine up until this point of shortly thereafter, correct?
With NO map change correct?
Did you buy those filters new (came with the BC kit) or second hand ?
So, just to be sure we're clear here. You bought your bike with pipes and nology wires installed and she's run picture perfect for three years of ownership before you installed the BC kit?
Moving backwards from picture perfect...what had YOU changed and what was the exact time frame?
Like...How long were you able to run with the K&N filters before you started fouling plugs?
Making sure I have my story straight...After your bike became ill, you dropped her off to the dealership and the dealership installed a new fuel pressure regulator because they said the fuel pressure was low? Low FP will not cause black and sooty arc plugs.
Huggy, A clogged fuel filter will not cause a rich condition. You would see lower fuel volumn during a volumn test and a higher duty cycle on a returnless system. When compensation no longer overcomes the issue, you will run lean.
2008 Model are also plagued with ignitor problems...most go to a procom unit and never look back.
Ok guys this is where I am up to so far:
However I am also suspicious as the bike had Nology Wires and NGK plugs, and in my recent naivety installned the Nology plugs also. And the deterioration in performance has followed the installation of the plugs.
Since the replacement of the MAP sensor hoses and returning the NGK plugs (new) to the bike, the same symptoms returned, extreme over-fuelling and the fouling of plugs over a very short period.
Like it has been mentioned previously in this post, it is strange that it has arisen quickly, and not been a gradual decline, well not one noticeable by myself in recent riding. Will also makes me question whether the ECU mapping can change rapidly, and rapidly enough to create these problems/symptoms, perhaps someone can shed some light on this theory? if the nology items installed have changed the ecu's mapping or setup for the worse.
If not and the ECU mapping is the same as it has been, this would indicate that the bike, although not running to its "full potential", was running satisfactory with the short pipes and airbox removed untill the nology items were installed.
So perhaps the oil pressure sensor may of packed it in creating a instant or quick change in performance. That will be the next thing i check, then i will re-install the original leads. Sorry for the barrage of questions, but could the nology items have damaged the factory coil??
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