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Title: How to increase target (low side) pressure in MED9 - KFNTBKS ? Post by: ericpaulyoung on June 19, 2015, 12:29:24 PM First a little info on my current predicament.
I am trying E85 and need more fuel pressure for my aux port injector. So I need to up my low pressure target as a function of nmot_w or boost pressure. I have been through BKS for MED9 and it appears the low pressure fuel is a set value to which a delta is added. There are a bunch of possible ways to add/subtract from the pressure pbksoll_w, but it looks like there is no adjustment for manifold pressure, so the one I think I need to adjust is based on fuel temperature and motor speed. This should be map KFNTBKS, but again I run into not having the map. Have any of you had a port injector addition and needed to vary your low side pressure to compensate for manifold pressure on an MED9 car? Or just had to adjust your low side pressure target for some other reason? If so, did you use KFNTBKS, or is there another way to modify pbksoll_w that I am just not seeing? EPY Title: Re: How to increase target (low side) pressure in MED9 - KFNTBKS ? Post by: ericpaulyoung on June 20, 2015, 01:07:24 PM So Daz helped out with the KFNTBKS map, and I tried it out. It does increase fuel pressure target, but it is hitting a max limit that I think is in a codeword, so I am off to look for that.
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