HELP- Pre Detonation at 5k rpm

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04-27-2010, 02:03 PM

#31

abakja1

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Sounds like a problem Devin who bought my LGT is having,..hitting a wall at 4k, of course no UTEC..

I was told it to be boost leak somewhere I can't find for new owner...Typical vacuum hose were found hanging, but hooked back up with zip ties and still connected after test drive with same problem...Was told it could be a vacuum leak in rubber intake hose to turbo, or double check the silicone hose (FMIC) to throttle body is connected well and no other tears/holes in any other silicone connectors..

Good luck,..
Subscribed,..

04-27-2010, 02:41 PM

#32

spinplay01

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pull off your intercooler and check the y-pipe. still the plastic stock one right?

04-27-2010, 03:08 PM

#33

THESLEEPER

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Still the stock one. Ok i'll check the intercooler hoses and such.

04-27-2010, 05:18 PM

#34

AcCoRd N wRx Dd

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how about boost levels? if you are overboosting then the car runs lean and will cut off like you are stalling in the middle of accelerating. had this problem due to manual boost controller.

04-27-2010, 06:21 PM

#35

THESLEEPER

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Boost levels are normal, i actually turned down the boost a bit but it didnt help.

04-27-2010, 06:37 PM

#36

YuudaiSTI

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Didnt you just sell this car or is this a new WRX? Goodluck, curious to see the problem, I know you'll find it. You got a good team here trying to figure it out with you.

04-27-2010, 08:15 PM

#37

Thug Nasty

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Quote:

Originally Posted by THESLEEPER

IT DOES HAVE THE KNOCK COUNT, ITS THE LAST COLUMN. YES I GET A FLASHING CEL WHEN IT HAPPENS BUT THEN GOES AWAY.

4591 055 +12.5 80 +17.8 rich 00000
4578 056 +13.1 80 +18.0 rich 00000
4616 064 +13.1 70 +18.2 rich 00000
4498 073 +13.9 80 +8.7 rich 00006
4528 071 +14.7 70 +0.5 rich 00018
4516 069 +14.1 90 +0.5 rich 00016
4528 068 +14.1 80 +0.6 rich 00006
4420 059 +14.5 70 +0.5 rich 00019
4492 058 +14.3 80 +0.5 rich 00024
4385 024 +14.1 70 +0.5 rich 00009
4306 030 +14.3 80 +0.5 rich 00006
4065 000 +11.9 10 ECU. rich 00001
3675 000 +6.6 00 ECU. rich 00000
3350 000 +1.5 00 ECU. rich 00000
2989 000 -3.6 00 ECU. 13.8 00000
2952 013 -6.3 00 ECU. 23.2 00000
2929 014 -5.1 00 ECU. 14.1 00000

Ah I see now. I'm sorry I missed that, I was exhausted. If you're getting 24 counts of knock lol I'd suggest not doing it very often haha. I guess my next question is, what did you do that started all this knocking? Did it just start out of the blue one day? Did the previous owner do any open source tuning on it?

04-27-2010, 08:38 PM

#38

joejoe69

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Wow, that's a good amount of KC's. Is this part throttle?

04-27-2010, 10:10 PM

#39

iNfEk

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Quote:

Originally Posted by spinplay01

pull off your intercooler and check the y-pipe. still the plastic stock one right?

did I suggest this already?

04-27-2010, 11:31 PM

#40

THESLEEPER

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Car Info: 2002 wrx

This is the car I sold and while waiting for the check to clear this happened and I'm trying to fix it so I can complete the deal.

I putlled the timing belt covers and everything is aligned properly so belt never jumped.

I was told that the ecu could be screwed up.

I'm stressin out. I didn't do anything nutz to cause this.

04-27-2010, 11:36 PM

#41

THESLEEPER

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Car Info: 2002 wrx

This is full throttle but it will do the same thing no matter what throttle amount.

04-27-2010, 11:47 PM

#42

Thug Nasty

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Quote:

Originally Posted by THESLEEPER

I was told that the ecu could be screwed up.

If you've eliminated all other possible suspects, uh, I guess to check the ECU, you could do generally one of two things.

1. Just just swapping it with another completely stock 02 (maybe 03? - not sure) ECU and see what happens. I would leave the UTEC out of the equation.

2. Using a tactrix cable flash a stock ROM to your ECU. This method wipes it and you'd be flashing the ECU with a stock one like it came from the factory. This is different than just 'reseting' your ECU by disconnecting the battery.

If you dont have a cable and all the software already loaded, Option 1 would be easier and take like 20-30 minutes tops.

Last edited by Thug Nasty; 04-27-2010 at 11:53 PM.

04-28-2010, 12:24 AM

#43

THESLEEPER

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Car Info: 2002 wrx

I have another ecu but i don't know if its for a wrx or sti it has different numbers on it than my stock one. It came with my utec and was hooked up to a 02 wrx but i think it was flashed and i initially installed it with my utec and it ran like crap but when i installed my stock one it was fine. It was from the guy in makaha that wrecked his built bugeye and parted it out.

Numbers on it are 7e 22611aj030 denso

Maybe i can reflash this ecu, anyone can reflash these things

Anyone willing to lend me an ECU?

Last edited by THESLEEPER; 04-28-2010 at 12:26 AM.

04-28-2010, 10:35 AM

#44

THESLEEPER

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Car Info: 2002 wrx

From My research this ecu is from an 03 wrx , anyone able to reflash this for me?

04-29-2010, 09:13 AM

#45

THESLEEPER

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Car Info: 2002 wrx

I installed my spare ecu that was flashed because even though it was flashed and runs like crap on my car at least maybe i could tell if the car would rev past 5k rpm... IT DID!

I think this whole problem was my ECU!
I need help either flashing my ECU back to stock or locating a new one.

Thanks a lot for everyones help.

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