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Old 04-09-2005, 12:33 AM   #1
rideboarderferg
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Member#: 45108
Join Date: Oct 2003
Location: MD
Vehicle:
2002 subaru WRX
silver

Default utec knock I think?

I got my UTEC stage 3 tuned at curry's automotive in virginia last week and took my car out to the track tonight. I think im getting knock in 3rd and 4th gear but not sure if thats what it is. In third around 5500 rpms the CEL flickers and goes away and feels like the car doesnt want to pull for a second then goes to normal then same thing in 4th. What is this? Also do you think I should just take it back to the shop and they should fix it for no extra charge or should I expect another tuning charge?
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Old 04-09-2005, 02:58 AM   #2
feiron
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Chapter/Region: VIC
Location: Westwood Plateau, Coq
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[S600BY]

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you need to log a run on the 3rd and 4th to see what causes the knocks

it can be too much timing advance, high EGT, too lean, too much boost... etc etc

Have the shop check it if you dont have a laptop... but its always best if you have a laptop to work with the utec
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Old 04-09-2005, 08:48 AM   #3
rideboarderferg
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I just went out for a quick drive at Wot on a new tank of gas and didnt get any knock whatsoever. Im going to datalog tonight and post the sheets but do you think bad gas can cause knock?
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Old 04-09-2005, 10:23 AM   #4
AaronWRX
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why you would take your car to currys for tunning is beyond me. Why didnt you ask the Mid-A forum where to go?
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Old 04-09-2005, 02:15 PM   #5
dosage0
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Join Date: Aug 2003
Location: VF35, Pinks
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2004 WRX
Silver - UTEC, Tuna, TBE

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knock can be caused by MANY things -- and yes, thats what was happening when the cel flashed. It could have been the gas, the weather was colder or warmer, or its just too aggressive.

The UTEC pulls timing for a few RPMS, that was the lag in power you felt. Its very sensitive and thats a good thing. It will usually pull timing faster than the stock ECU will. If it happens rarely, thats pretty much to be expected. If it happens often you need to tone it down in the areas you are having problems. Usually it just means dropping boost slightly, or taking out a point of timing.

Rob
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Old 04-11-2005, 10:13 AM   #6
CurrysAuto
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rideboarderferg,

If you have any questions at all, do NOT hesitate to call us and/or bring the car back in. You will not incur any additional expenses in this regard and I can promise you that whatever issues you do have will be resolved to your satisfaction. As a matter of fact, call me directly and I'll make the necessary arrangements.

Regards, Bill Shaw
Director of Customer Service
Curry's Auto Service.
571-215-1011
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Old 04-11-2005, 11:18 AM   #7
rideboarderferg
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yea i talked to dan this morning. I just wanted to see if it was something else on my car causing the knock before I brought it all the way back in. Thanks though I appreciate it.
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