-Speed Density and Shift Tables- not agreeing with one another :HELP:
-Speed Density and Shift Tables- not agreeing with one another :HELP: my car is shifting to second gear immediately upon launch (leaving it in drive) AND its shifting out of first gear early.
my shift tables are apparently screwed up. i've been told that the computer was commanding the "quick" shift because of something to do with the speed density tune but havent found an answer as to why.
will some of you guys ask around (ask your tuners) and get back with me with some things i might be able to try?
thanks,
brent
my shift tables are apparently screwed up. i've been told that the computer was commanding the "quick" shift because of something to do with the speed density tune but havent found an answer as to why.
will some of you guys ask around (ask your tuners) and get back with me with some things i might be able to try?
thanks,
brent
FormerVendor
Joined: Oct 2006
Posts: 3,123
Likes: 3
From: D-F/W
I would be surprised that this began to happen with out some sort of a change... hardare or software.
Can you tell us what if anything has been changed recently...
Usually a change in the gear ratio will create a stack shift like you are describing here. If the gears were changed, sometimes even the tires, then adjustments will need to be made in the appropriate tables.
Can you provide us with more info?
g
Can you tell us what if anything has been changed recently...
Usually a change in the gear ratio will create a stack shift like you are describing here. If the gears were changed, sometimes even the tires, then adjustments will need to be made in the appropriate tables.
Can you provide us with more info?
g
i really dont have anymore info. nothing has been changed. i got my SD tune a couple of months ago and this just popped up and started happening to me a couple weeks ago. the ONLY thing that comes to mind is the fact that my tires are worn slick, but they are MT dr's and shouldnt be but about 1/2" shorter than stock. i dont think that little bit would change anything. other than that, nothing has changed
FormerVendor
Joined: Oct 2006
Posts: 3,123
Likes: 3
From: D-F/W
Sorry for not following this more closely for you.... been busy here at the shop.
The 1st thing to do is verify that indeed the shift in question is indeed being commanded early. If so it is a tuning issue.
"my car is shifting to second gear immediately upon launch (leaving it in drive) AND its shifting out of first gear early." [B]I just re-read that comment, can you explain please. Shifting out of 1st early and shifting into second gear immediately are the same thing.
The 1st thing to do is verify that indeed the shift in question is indeed being commanded early. If so it is a tuning issue.
"my car is shifting to second gear immediately upon launch (leaving it in drive) AND its shifting out of first gear early." [B]I just re-read that comment, can you explain please. Shifting out of 1st early and shifting into second gear immediately are the same thing.
Originally Posted by RICEETER
i really dont have anymore info. nothing has been changed. i got my SD tune a couple of months ago and this just popped up and started happening to me a couple weeks ago. the ONLY thing that comes to mind is the fact that my tires are worn slick, but they are MT dr's and shouldnt be but about 1/2" shorter than stock. i dont think that little bit would change anything. other than that, nothing has changed
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Originally Posted by Ratchthed
Sorry for not following this more closely for you.... been busy here at the shop.
The 1st thing to do is verify that indeed the shift in question is indeed being commanded early. If so it is a tuning issue.
"my car is shifting to second gear immediately upon launch (leaving it in drive) AND its shifting out of first gear early." [B]I just re-read that comment, can you explain please. Shifting out of 1st early and shifting into second gear immediately are the same thing.
The 1st thing to do is verify that indeed the shift in question is indeed being commanded early. If so it is a tuning issue.
"my car is shifting to second gear immediately upon launch (leaving it in drive) AND its shifting out of first gear early." [B]I just re-read that comment, can you explain please. Shifting out of 1st early and shifting into second gear immediately are the same thing.
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The data log is showing you what was comanded so you allready have that information.
__________________
I think hes saying that the place he has it set to shift and what the data logger Is showing about The actual comanded shift is different,
for instance set to shift at 6200 but the PCM comanding it at for example 3000.
for instance set to shift at 6200 but the PCM comanding it at for example 3000.
__________________
correct. it is tuned to shift at 6650rpm but we data logged a pass at the track on efilive and then come back and watched the pass on the computer. its logs everything your car does, for example a/f, shift points, mph, knock retard, etc. we watched the car shift out at 6200rpm
FormerVendor
Joined: Oct 2006
Posts: 3,123
Likes: 3
From: D-F/W
If you could send me the EFI Live .bin files and a very detailed explanation of what takes place I will get with the Tuners next door and see what we can find out for you. I think there is some conflicting information in some of your shift tables. Not sure, but it is extremely unlikely that this is a internal hardware issue.
Let's see what that does for us! Get me those tables and log files. Contact info in my sig.
Let's see what that does for us! Get me those tables and log files. Contact info in my sig.
