Sam
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Posts posted by Sam
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do you have a log file of if when it stumbles. Be interesting to see whats actually going on when it does it.
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Spark is used to control the idle rpm, if you change your desired idle rpm the pcm will change your spark to help achieve the desired rpm. Vice versa you change the spark it'll change idle rpm. Try changing your desired idle rpm by 100/200 and see what your spark does.
Is there a reason you want to play with your idle spark?
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That gives a brief description of idle spark. Spark is used to control idle rpm, introduce a vacuum leak into the system or change the idle rpm and your idle spark will change in order to try and achieve your desired idle rpm.
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DTC Controls
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My couple little tips with playing with the Miami is be careful when opening the throttle from 50% to 80%, I haven't personally looked but check what ford did with the timing between the GS and the GT-F and this should give you an idea of what needs to happen with timing. Also opening the throttle more will effect the boost levels hence the change in the boost control tables.
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HAFFAG4 is for a 335 5.0 auto
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With all that being said the table goes up to 71 and as far as I'm aware there isn't that many shift patterns so yeah...........
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This is actually the first time I've seen this table and I was assuming the opposite, as my shift pattern 27 is 1 and my "manual mode" still works. I'm also going to assume that yours still works as you said earlier you were testing in that mode earlier today.
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Yeah righto, Something else to check that I noticed in your compare screenshot is that there a table called "table of allowed drive programs" under "zf workshop development arrays". When I checked that on one of my files all the shift patterns that were changed eg 34, 35, 36, 37, 38 because of axis change, were all 0 is I'm assuming is disable for a lack of better word. Check to see what they are on yours are they may will be disabled and that may eliminate some things to check.
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What mode was the zf in when you were testing it, eg drive, performance or manual?
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Have you changed the torque requestor tables from standard?
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Thanks @Darryl@pcmtec for that. I assumed that would be the case.
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@finnigan001 This may be a silly question, but what are unites for the Hi Slope and Low Slope in that spreadsheet? I'm assuming the Imperial values are lb/hr?
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Was discussed last week and the information you're looking for might be in there.
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Shift pattern 27 is your manual mode. You'll find it under ZF Shift/Lock Schedule
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Have you changed shift pattern 27 at all?
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Change the shift table so it doesn't change down a gear. You should be able to put it into 4th and have it at at or below 2500rpm.
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What do you mean by that? I’m assuming you mean stop it from changing out of 3rd or 4th? If that’s the case just manually select gears and put it in which ever gear you want and then start the run once in the gear you want.
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Don’t know wiring pin out, but you can probably find the wiring diagrams and figure it out. Otherwise there are a few people that are making kits which are plug and play.
PCM will be looking for a 0-5v signal I believe.
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That would be great Roland, it’s one of those things that is always annoying when you come across it but I’ve just always forgetten to mention it to you guys.
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Shift pattern 0 is a drive mode, go through and compare it to other patterns and you’ll see a pattern start to emerg.
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Just thought I would give yous a little update and give you some more information on shift patterns as it may help some of yous out.
After having a look at the standard ZF tune that comes in my FG F6, FG XR6T and a FG GT that I recently had a play with, it appears that Drive and Performance modes shift patterns are constant between the three of them, so if "x" shift pattern was a drive mode on the F6 it was also a drive mode on the GT & XR6T and same as performance modes. The difference I found was that shift pattern 35 through to 38 on the GT are Limp modes. The table below is shift table 35 for the GT which shows it won't allow it change down to 1st or 2nd. With the two turbo 6 cylinder shift patterns 35 through 38 still allowed the ZF to shift down to 1st and 2nd.
The best way I've found to differentiate between a drive, performance, manual, limp etc mode is the characteristics of each table. For example in a limp mode the gearbox won't be able to change into certain gears and generally that's lower gears and the shift table above reflects that. If you know what the ZF will do in certain modes then you can figure out which mode is which patterns.
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My tip for a starting to play with a car with a zf would be to leave the line pressures alone and look at the tables mentioned above by Roland and just increase the pressures bit by bit and you’ll notice a difference, huge changes aren’t really needed.
I’d be looking at making your changes in the higher load side of things rather than the lower load areas.
FGX XR6 cruise control issues after gear ratio change
in Engine Tuning (AUS)
Posted
@Tom I'm assuming you're talking about the diff ratio, if so you're looking for Final Drive Ratio I believe