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Old Aug 21, 2009, 10:48 PM   #1
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05' RS "Service Engine Soon" Light Flashing When Boost Spikes, Not Solid.

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So, I have noticed that under full throttle in certain situations, when the boost spikes, i get the "service engine soon" light flash a few times and then stay off. my car is stock except a downpipe and exhaust. The ECU was flashed by English Racing, called and emailed them but got no answer. Doesn't feel like boost cut because it is not harsh, sounds normal. I am worried about detonation or knock. I also don't want to take it to the dealer for fear of re-flash to stock. This happens a few times a week when I get on the throttle and bothers me to no end.

Any ideas? Thanks!
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Old Aug 21, 2009, 10:56 PM   #2
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Tephra's flash CEL on knock mod. Might not be anything serious, but sounds like it's just warning you about detonation.
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Old Aug 21, 2009, 11:18 PM   #3
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thanks! i found the information i was looking for. i didn't know the technical term for the mod.

i assume some knock is normal. the CEL is flashing 3 times slowly, so depending on how they flashed it, it may not be a big deal? you would think english racing would have called back if they wanted my money for a re-tune. oh well...

i may try a small race fuel mix and see what happens...

anyone had a similar experience they fixed without a re-tune? i understand finding the sweet spot is hard without proper tuning.

Last edited by AoyamaJPN; Aug 21, 2009 at 11:32 PM.
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Old Aug 23, 2009, 03:10 PM   #4
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if it does it every once and awhile then you are fine, if it happens every time you go into boost then you need a retune
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Old Aug 23, 2009, 06:02 PM   #5
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Quote:
Originally Posted by olmoscd View Post
Tephra's flash CEL on knock mod. Might not be anything serious, but sounds like it's just warning you about detonation.
This is correct. Do you know who the previous owner was?
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Old Aug 24, 2009, 12:37 AM   #6
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buy yourself a knock sensor
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Old Aug 24, 2009, 01:00 AM   #7
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buy yourself a knock sensor
??

All evos have a knock sensor from the factory and that is what the knock light mod is referencing....
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