Roland@pcmtec Posted May 14 Share Posted May 14 The 15+ Ford Focus employees a blending factor between two sets of tables within a temperature range of 175°f to 180°F This affects multiple tables. The injection pressure is discussed below, however there are many other items (SOI and injection timing that also have two sets of timing which need to be considered. The blending factor for the cold and base dI tables is MID43633 blending factor for intake timing tables During normal operation the following two tables are blended auF30278 auF30279 Cold table the Y axis is determined by MID MID57740 "lb of fuel per combustion event" hence the very small numbers". Datalogging this and rpm will allow you to map trace this table. The blending factor is determined via the following temperature range ID Name Value Stock Units Description auF34838 Below which intake timing will be 100% auF29902 175 175 Below which intake timing will be 100% auF29902 and pressure auF30279 ID Name Value Stock Units Description auF34839 Above which intake timing will be 100% auF29904 180 180 Above which intake timing will be 100% auF29904 and pressure auF30278 Ensure that auF34839 is higher than auF34838 other wise this will break the blend/ramp Finally there is a rail pressure clip based on ECT temperature which must be set if you plan to go above 2900 psi There is also a minimum fuel pressure clip set here: ID Name Value Stock Units Description auF32830 Minimum set point for the FRP. 200 200 Minimum set point for the FRP. On startup there is another MID to check MID05038 - DI cold after start mode desired If this is true the following table is used (cranking only I believe) When CAS mode is used, the following fuel pressure is used. This once again uses very small values. When in CSER mode the following table is used Whilst flex fuel is not enabled in these cars, the FFV tables are present. To ensure that the FFV tables are not being used, check that the following table is entirely 0. The final desired pressure will then be loggable via MID35950 Final desired FRP Quote Link to comment Share on other sites More sharing options...
Stu Posted May 14 Share Posted May 14 Nice info, thanks Roland. I have to play with this set extensively when we go to the biggest injectors for the RS or they run terribly when cold due to the factory settings running them well below their knee point. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted May 15 Author Share Posted May 15 18 hours ago, Stu said: Nice info, thanks Roland. I have to play with this set extensively when we go to the biggest injectors for the RS or they run terribly when cold due to the factory settings running them well below their knee point. A requirement when going to a bigger DI pump as well as you often have to reduce pressures in these cases. Quote Link to comment Share on other sites More sharing options...
Stu Posted May 15 Share Posted May 15 (edited) 5 hours ago, Roland@pcmtec said: A requirement when going to a bigger DI pump as well as you often have to reduce pressures in these cases. Indeed. Fun fact, the latest generation of XDI's uprated high pressure fuel pumps for the 2.0 and 2.3 Ecoboost are only rated to 2600psi. 300psi LESS than the factory RS pump, so when running standard injectors you just wasted almost £2000! A conversation i have to have with "Saturday night after beer" purchasers all too often. Sadly, the end user thinks 2600psi sounds a lot. Until they learn the factory one already does 2900 psi and they were out of injector, not pump. Edited May 15 by Stu Quote Link to comment Share on other sites More sharing options...
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