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Old 12-13-2007, 07:08 AM   #1
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Default UTEC detecting knock.....

I have a UTEC with the OTS stage 1 map, no other mods.

So I went open throttle today in 2nd gear, and the CEL started blinking. This means it's detecting knock. However, it kept blinking for a good 10-20 seconds after that when I had let off the throttle. I don't get it. Why would I be knocking on a stage 1 OTS map with an otherwise stock car? I'm using 93 oct. And why would it continue blinking for a while after I had let off the pedal?

The other day the CEL came on and stayed solid when I went open thottle and hit higher RPM's but I didn't think anything of it. It also came on for a split second after turning on the car a week ago.

Can you guys help? It didn't seem to drive terribly or anything after it blinked, but I also didn't go open throttle/high rev's after that.


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Old 12-13-2007, 07:19 AM   #2
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Default Re: UTEC detecting knock.....

The best thing to do is hook up your laptop and take a drive, logging the results. The UTEC's logging capability takes a lot of the guess work out of diagnosing issues like this.
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Old 12-17-2007, 02:56 PM   #3
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Default Re: UTEC detecting knock.....

OK so here's the update. I'm a dumbass. I must've missed the part about the CEL blinking fast for knock and slow for misfire. So, yes, I'm experiencing misfire at high rpm's. So I gotta pull the plugs and check the gap as my first step. If the plugs are good, whats next?

However, I still don't know why I'm only hitting .9-1.0 mPa for max boost according to the factory boost guage. I don't have a laptop nearby, so I haven't been able to datalog. Perhaps the boost is fine but the guage is jacked, because the car is pulling stronger(especially at topend) than stock(yes, even the OTS stage 1 map is butt-dynoable). Actually, even when the CEL blinks for a misfire, the car is still smooth/strong from what I could tell.

Well, I should be able to datalog come this weekend. Hopefully that will help.
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Old 12-17-2007, 09:54 PM   #4
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Default Re: UTEC detecting knock.....

Get some datalog asap. I hope turboxs has updated thier tunes from years ago. I had horrible luck with there OTS maps. Good luck with yours.


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