[Diy_efi] Knock sensor Q
Grant Beaty
gbeaty at ufl.edu
Fri Nov 1 07:29:57 GMT 2002
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It read the same as another FJO they had at the dyno, and the same as a =
friend's FJO, and the same as another friend's FJO, etc.
Grant
-----Original Message-----
From: Justin Starkey @ VMP <justinv6 at bellsouth.net>
To: diy_efi at diy-efi.org <diy_efi at diy-efi.org>
Date: Monday, October 28, 2002 12:05 PM
Subject: Re: [Diy_efi] Knock sensor Q
=20
=20
I can't help you with the Knock sensor. How accurate was yor FJO =
WB? I haven't had a chance to test mine against any others.
Justin Starkey
www.VelocityMustangPerformance.com
**Quote Original E-Mail In Reply**
----- Original Message -----=20
From: Grant Beaty=20
To: diy_efi at diy-efi.org=20
Sent: Sunday, October 27, 2002 11:22 PM
Subject: [Diy_efi] Knock sensor Q
=20
=20
Has anyone ever seen a knock sensor, or even a ECU, go bad & =
trigger knock sooner than others?
=20
My car actually makes peak power with an a/f of about 10.5:1 on =
pump gas. It doesn't matter if the boost is 15 or 19, it just pulls too =
much timing. Leaning out from mid-high 10s to 12.0: lost 5rwhp, and its =
even worse in the 1/4 mi, where it at WOT longer (2-3 mph would be lost =
with a similar tuning change).
=20
I've done a plug chop on the dyno, and it didn't show any =
cylinder imbalance. Compression is 172-175 in all cylinders. My FJO WB =
has been verified against others. Carbon build up isn't possible with my =
driving style. So the only thing left to check is the electronics, and =
new knock sensors aren't cheap, so I'm asking here first.
=20
Thanks for any help,
Grant Beaty
'97 Toyota Supra T66 6-speed
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<DIV><FONT color=3D#000000 size=3D2>It read the same as another FJO they =
had at the=20
dyno, and the same as a friend's FJO, and the same as another friend's =
FJO,=20
etc.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Grant</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: =
5px">
<DIV><FONT face=3DArial size=3D2><B>-----Original =
Message-----</B><BR><B>From:=20
</B>Justin Starkey @ VMP <<A=20
=
href=3D"mailto:justinv6 at bellsouth.net">justinv6 at bellsouth.net</A>><BR>=
<B>To:=20
</B><A href=3D"mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A> =
<<A=20
=
href=3D"mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A>><BR><B>Dat=
e:=20
</B>Monday, October 28, 2002 12:05 PM<BR><B>Subject: </B>Re: =
[Diy_efi] Knock=20
sensor Q<BR><BR></DIV></FONT>
<DIV><FONT face=3DArial size=3D2>I can't help you with the Knock =
sensor. =20
How accurate was yor FJO WB? I haven't had a chance to test mine =
against any=20
others.</FONT></DIV>
<DIV>Justin Starkey<BR><A=20
=
href=3D"http://www.VelocityMustangPerformance.com">www.VelocityMustangPer=
formance.com</A><BR>**Quote=20
Original E-Mail In Reply**</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px"=20
dir =3D ltr>
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- =
</DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:gbeaty at ufl.edu" title=3Dgbeaty at ufl.edu>Grant =
Beaty</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:diy_efi at diy-efi.org"=20
title=3Ddiy_efi at diy-efi.org>diy_efi at diy-efi.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, October 27, =
2002=20
11:22 PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [Diy_efi] Knock =
sensor=20
Q</DIV>
<DIV><BR></DIV>
<DIV><FONT color=3D#000000 size=3D2>Has anyone ever seen a knock =
sensor, or=20
even a ECU, go bad & trigger knock sooner than =
others?</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>My car actually makes peak =
power with an=20
a/f of about 10.5:1 on pump gas. It doesn't matter if the boost =
is 15 or=20
19, it just pulls too much timing. Leaning out from mid-high 10s =
to=20
12.0: lost 5rwhp, and its even worse in the 1/4 mi, where it at =
WOT=20
longer (2-3 mph would be lost with a similar tuning=20
change).</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>I've done a plug chop on the =
dyno, and=20
it didn't show any cylinder imbalance. Compression is 172-175 in =
all=20
cylinders. My FJO WB has been verified against others. Carbon =
build up=20
isn't possible with my driving style. So the only thing left to =
check is=20
the electronics, and new knock sensors aren't cheap, so I'm =
asking here=20
first.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 size=3D2>Thanks for any =
help,</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2>Grant Beaty</FONT></DIV>
<DIV><FONT size=3D2>'97 Toyota Supra T66=20
6-speed</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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