Knock Knock...Whose there???

Posted: Fri Jul 22, 2005 6:28 pm Post subject: Knock Knock...Whose there???

my car with upwards of 9* of knock at WOT Crying or Very sad

anyone have idea the best way to kill some of this knock. if i can figure a way to get the files off the a-tap i can post them (any ideas how?). Scott and i were seeing quick blips of knock only at WOT runs on the highway.

mods:

DHP
3.4
Wizair Intake
RT DP
2* colder plugs
180* t-stat
1.9 rockers

any idea of what could cause this explosion of knock on my car?
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MODS: Stock

Posted: Fri Jul 22, 2005 6:30 pm Post subject:

if it bliped and went to down after a sec sec of WOT somthing is hitting somthing
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New Era performance

01z28, M6 NA, mullet, T tops, siqqqq

Posted: Fri Jul 22, 2005 6:57 pm Post subject:

9 is pretty high with those mods. Sometimes when there is a problem with the car the PCM retards timing using KR and it can be 9-12 degrees. Could be false knock or something else wrong with the car. If it's real knock, the KR should decrease if you run 100 octane.

Posted: Fri Jul 22, 2005 7:48 pm Post subject:

we never saw the same knock at the same speed/time each run, they were always at diff mph and diff *'s. ill get the scans up on here tomorrow

Posted: Fri Jul 22, 2005 9:03 pm Post subject:

It was steady between 2-5* at WOT, and his DHP seems to be shifting really low around 5400-5500?

The 9.9* KR was at a VERY odd 1475rpm in 2nd gear...but it was just a 2 frame blip, so who knows.
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2002 WRX Wagon - SOLD!!
2009 Toyota Rav 4 Sport.... Yeah.......

Posted: Fri Jul 22, 2005 9:18 pm Post subject:

Posted: Fri Jul 22, 2005 9:29 pm Post subject: Re: Knock Knock...Whose there???

oh shit I have too

Posted: Sat Jul 23, 2005 3:34 am Post subject:

so johnny what are u thinking it was then?? do u think it might be my dhp??

Posted: Sat Jul 23, 2005 11:00 am Post subject:

DP hitting.......... I'd start with

Posted: Mon Jul 25, 2005 9:11 am Post subject:

how do i post the spreed sheet file??

Posted: Mon Jul 25, 2005 10:07 am Post subject:

Posted: Mon Jul 25, 2005 10:33 am Post subject:

damn, that would be sweet...

untill then how else can i post it?

Posted: Mon Jul 25, 2005 6:12 pm Post subject:

here is my scan

http://www.rit.edu/~eta9065/jason_dhp_run.csv

can anyone help? Embarassed

Posted: Mon Jul 25, 2005 6:31 pm Post subject:

Your O2 values are low (865-880) so you are probably running lean, causing knock. Before you go WOT, your PCM thinks you are running rich (negative LTFT) so that's not helping you. I think you need to tune to fix this (PCM or mini-AFC). Also, if you have 70-80k miles on your front O2 sensor, you might want to replace it.

Posted: Mon Jul 25, 2005 6:42 pm Post subject:

larry, thanks for the reply! what do u think i should get done to my pcm?? i dont know the slightest thing about tuneing. im gonna get a few goodies in the next month or 2 and then see where i sit. i know scott said my car was shifting very low, i e-mailed dhp and they had no idea what i was talking about.

how hard is it to use a AFC??

any other suggestions?

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