 KNOCK @ Low RPM, St205 - PowerFC - Knock |
 Mar 26, 2014 - 11:01 AM
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Enthusiast  Joined May 16, '11 From YYC Currently Offline Reputation: 0 (0%)  |
I am in need for some expert advice. Currently I purchased a used PowerFC for my ST205 and brought my car into a shop for a safe tune (not aggressive). My issue is my Check engine light flickers on and off, I noticed that knock starts to report at low RPM range. 2600RPM - 3000RPM. I dont hear any knock and Im hoping that its phantom knock. I have added my logs from datalogit f anyone can provide any advice it would be appreciated.
my current mods are basic: HKS Intake Exhaust manual boost controller set at only 15-16 lbs. and Berk Downpipe. HighKnockLogs |
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Mar 31, 2014 - 9:34 PM
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 Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
QUOTE (83841 @ Mar 31, 2014 - 10:04 PM)  Just got back from the tuner and it looks like the timing needed to be pulled back in a couple of cells mostly in n06-n08 range (low RPM range on the powerfc datalogit). We ended up road tuning as they said it was not necessary to put it back on the dyno based on the logs that Ive captured. The tuner sat in the passenger side with my laptop watching the datalogit/logs while I was driving to replicate the issue. Now my knock went from high 80s-90s to low 40's and below. NO MORE CHECK ENGINE LIGHTS!!! WHOO HOO!!! Was done all within an hour... I love driving my car again!!!! What type of dyno was this originally tuned on? These types of problems tend to pop up when you tune on something like a dynojet that can only do WOT pulls and can't hold the engine under load at specific points. -------------------- 15PSI - 30MPG - Megasquirt Tuned
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Apr 1, 2014 - 10:42 AM
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Enthusiast Joined May 16, '11 From YYC Currently Offline Reputation: 0 (0%) |
QUOTE (lagos @ Mar 31, 2014 - 9:34 PM) QUOTE (83841 @ Mar 31, 2014 - 10:04 PM) Just got back from the tuner and it looks like the timing needed to be pulled back in a couple of cells mostly in n06-n08 range (low RPM range on the powerfc datalogit). We ended up road tuning as they said it was not necessary to put it back on the dyno based on the logs that Ive captured. The tuner sat in the passenger side with my laptop watching the datalogit/logs while I was driving to replicate the issue. Now my knock went from high 80s-90s to low 40's and below. NO MORE CHECK ENGINE LIGHTS!!! WHOO HOO!!! Was done all within an hour... I love driving my car again!!!! What type of dyno was this originally tuned on? These types of problems tend to pop up when you tune on something like a dynojet that can only do WOT pulls and can't hold the engine under load at specific points. I dont know what dyno was used by the previous owner, but the tuner I took it too uses a Dynapack 4-wheel Chassis Dynamometer. I think they just tuned WOT as I know the dyno they use can do POT and they just missed it. |
Posts in this topic
83841 KNOCK @ Low RPM Mar 26, 2014 - 11:01 AM
lagos Thats a really common area for knock. I've see... Mar 28, 2014 - 9:48 PM Syaoran Try stepping on it after 3000rpm instead of at low... Mar 29, 2014 - 10:48 AM lagos QUOTE (Syaoran @ Mar 29, 2014 - 11:4... Mar 29, 2014 - 7:16 PM
Syaoran QUOTE (lagos @ Mar 29, 2014 - 8:16 P... Mar 29, 2014 - 7:38 PM cardshark525 QUOTE (Syaoran @ Mar 29, 2014 - 7:38... Mar 29, 2014 - 11:50 PM Syaoran It's not as easy as it seems though Mar 30, 2014 - 3:59 PM cardshark525 Oh I know. Just pointing out kind of a funny issue... Mar 30, 2014 - 4:23 PM lagos The basic trick to fixing this is to massively dro... Mar 30, 2014 - 7:03 PM 83841 Just got back from the tuner and it looks like the... Mar 31, 2014 - 9:04 PM PETE That area of the map is very common for knock on t... Oct 2, 2014 - 7:39 PM jbod You can use the map tracer with the FC datalogit. ... Oct 11, 2014 - 5:04 AM |
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