My rev matching is dying
10-02-2017, 12:43 PM
#136
The car spent three days at the dealership, they were unable to duplicate the issue. The car was giving me fits a few days prior to dropping it off with them, but it was a perfect angel on my drive to the dealer. They did a DME update and adjusted the throttle to "the updated spec" and said hopefully/maybe this will fix it but there was no way to verify.
We'll see!
We'll see!
10-02-2017, 01:38 PM
#137
10-02-2017, 08:43 PM
#139
DSC box?
Something mooty said way at the beginning of this post caught my attention.
I just got home from a weekend at ORP. What was unique about this trip was that (a) it's the first time I tried a DSC box (didn't care for it, but that's another topic) and also the first time I noticed my rev matching feature not working consistently. I ended up putting my stock PASM box back after lunch the second day, and didn't have any more rev matching issues that I can recall - although, to be fair, I only did two more sessions that afternoon and I bailed out early because I was corded. Also, "not working consistently" doesn't mean 50% failure or even 10% failure - but I did notice maybe 3 times that my downshift to second didn't rev match like it should have.
I didn't make any connection between the DSC and the rev match failure, and I'm still not - but I'm curious if you have any aftermarket PASM replacement?
I just got home from a weekend at ORP. What was unique about this trip was that (a) it's the first time I tried a DSC box (didn't care for it, but that's another topic) and also the first time I noticed my rev matching feature not working consistently. I ended up putting my stock PASM box back after lunch the second day, and didn't have any more rev matching issues that I can recall - although, to be fair, I only did two more sessions that afternoon and I bailed out early because I was corded. Also, "not working consistently" doesn't mean 50% failure or even 10% failure - but I did notice maybe 3 times that my downshift to second didn't rev match like it should have.
I didn't make any connection between the DSC and the rev match failure, and I'm still not - but I'm curious if you have any aftermarket PASM replacement?
10-02-2017, 08:54 PM
#140
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10-02-2017, 11:15 PM
#141
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Something mooty said way at the beginning of this post caught my attention.
I just got home from a weekend at ORP. What was unique about this trip was that (a) it's the first time I tried a DSC box (didn't care for it, but that's another topic) and also the first time I noticed my rev matching feature not working consistently. I ended up putting my stock PASM box back after lunch the second day, and didn't have any more rev matching issues that I can recall - although, to be fair, I only did two more sessions that afternoon and I bailed out early because I was corded. Also, "not working consistently" doesn't mean 50% failure or even 10% failure - but I did notice maybe 3 times that my downshift to second didn't rev match like it should have.
I didn't make any connection between the DSC and the rev match failure, and I'm still not - but I'm curious if you have any aftermarket PASM replacement?
I just got home from a weekend at ORP. What was unique about this trip was that (a) it's the first time I tried a DSC box (didn't care for it, but that's another topic) and also the first time I noticed my rev matching feature not working consistently. I ended up putting my stock PASM box back after lunch the second day, and didn't have any more rev matching issues that I can recall - although, to be fair, I only did two more sessions that afternoon and I bailed out early because I was corded. Also, "not working consistently" doesn't mean 50% failure or even 10% failure - but I did notice maybe 3 times that my downshift to second didn't rev match like it should have.
I didn't make any connection between the DSC and the rev match failure, and I'm still not - but I'm curious if you have any aftermarket PASM replacement?
10-05-2017, 03:19 PM
#142
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10-05-2017, 05:31 PM
#143
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Multiple sensors and control modules are involved in the auto rev matching function. If there's a compromised electric connection in any of the items then it won't work. With that said, if there isn't a perfect connection when swapping the suspension control module(which has 80 contact pins) or a compromised electrical contact in any one of the items that are in the control loop then that could lead to intermediate or permanent issue with auto rev matching.
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PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
10-13-2017, 04:58 PM
#144
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Just left the dealer.....told me if there were not any faults picked up by the PIWIS, then was nothing they could do. Obviously and thankfully, there were no faults recorded. I mentioned some of the comments posted on this thread and the service advisor basically just shrugged his shoulders. I'm going to try another dealer.