Subject	Sounds like an issue with timing. Are your MAF(s), TPS and
Posted by	Gordo 93TT Daytona on April 24, 2012 at 7:52 PM
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In Reply To	RPM dip when tapping throttle - only when cold posted by treese88 on April 24, 2012 at 12:26 PM
Message	CAS all in good working order. I had a similar dip in throttle response that I traced back to a bad timing map in an after market EPROM. The first few rows in the map were 5' timing, and you can guess what happens when you come off 15' ON Idle and immediate fall into the fives. Once I passed 1200 RPM, everything was OK. Also the same issue with a cold start because the ECU is in closed loop, effectively enhancing the problem. When warm, it was better, but still present. _________________________________________________
Follow Ups	RPM dip when tapping throttle - only when cold - treese88 12:26:32 04/24/12 I have this same issue. - Draker (Eugene, OR) 12:37:21 04/24/12 When I talked to SZ months ago their guess for a different - treese88 15:25:40 04/24/12 You should check your fuel pressure, - MeatMan - 604Z.ca - 13:10:02 04/24/12 Thats what I thought at first..so I first pressure tested - treese88 15:17:55 04/24/12 what do you consider "significantly"? (n/m) - fuzzymonkey 14:22:07 04/24/12 Significantly is probably not the right word. If I'm idling - treese88 15:21:43 04/24/12 Sounds like an issue with timing. Are your MAF(s), TPS and - Gordo 93TT Daytona 19:52:08 04/24/12 Yep those are all good (they've been swapped). Stock - treese88 20:29:19 04/24/12 I would take another look at the timing as well. - Draker (Eugene, OR) 00:27:43 04/25/12 My cas is 15 dead center :/ darn - treese88 07:40:02 04/25/12 Good luck. Keep us posted. (n/m) - Draker (Eugene, OR) 17:37:10 04/25/12 My CAS is off to one side as well. - rojoloco (VA Beach) 06:59:31 04/26/12 Skipped tooth worst case. Also my timing light would get two - treese88 09:29:17 04/26/12 When it is in the center, it runs for crap. - rojoloco (VA Beach) 10:46:35 04/26/12 On all TT i have owned the cas has never been centered - toykoz32 22:40:18 04/26/12 It was pretty muh dead center on my last motor. - rojoloco (VA Beach) 05:21:00 04/27/12 I had the same problem . . once i sync'd the throttle - toykoz32 01:07:37 04/25/12 I remember seeing a write-up somewhere IIRC. - rojoloco (VA Beach) 07:00:10 04/26/12 Best one I found was related to syncing z1 tb's. Aafter I - treese88 09:25:27 04/26/12 Did this yesterday. Good recommendation and helped a little - treese88 09:22:48 04/26/12 Did you also get the slack out of the accelerator cable? (n/m) - toykoz32 16:10:50 04/28/12 It was already properly adjusted, forgot to mention. - treese88 19:35:51 04/28/12 I have the same problem. - rojoloco (VA Beach) 07:04:18 04/26/12 Very similar except I'm rich...and not moneywise! - treese88 09:35:57 04/26/12 I can try it out since it is easy. - rojoloco (VA Beach) 10:49:02 04/26/12 After adjusting the TB'S and then the TPS the dip appears to - treese88 13:47:42 04/30/12
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