[Diy_efi] Re: diy_efi Digest, Vol 15, Issue 2

robwarren at ou.edu robwarren at ou.edu
Thu Dec 2 18:07:14 GMT 2004


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-Rob
=3E=3D)


----- Original Message -----
From=3A diy=5Fefi-request=40diy-efi=2Eorg
Date=3A Thursday=2C December 2=2C 2004 11=3A58 am
Subject=3A diy=5Fefi Digest=2C Vol 15=2C Issue 2

=3E Send diy=5Fefi mailing list submissions to
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=3E To subscribe or unsubscribe via the World Wide Web=2C visit
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c
=3E than =22Re=3A Contents of diy=5Fefi digest=2E=2E=2E=22
=3E =

=3E =

=3E Today=27s Topics=3A
=3E =

=3E   1=2E =5Bdiy=5Fefi=5DPulse width meter - Using the Data (Jag Man)
=3E   2=2E Re=3A Pulse width meter (Jag Man)
=3E   3=2E RE=3A Pulse width meter (jim cottrill)
=3E =

=3E =

=3E -------------------------------------------------------------------
=3E ---
=3E =

=3E Message=3A 1
=3E Date=3A Wed=2C 01 Dec 2004 10=3A12=3A27 -0800
=3E From=3A =22Jag Man=22 =3Cjag=5Fman653=40hotmail=2Ecom=3E
=3E Subject=3A =5Bdiy=5Fefi=5DPulse width meter - Using the Data
=3E To=3A diy=5Fefi=40diy-efi=2Eorg
=3E Message-ID=3A =3CBAY12-F324AF1516FCC2451751EE6AEBF0=40phx=2Egbl=3E
=3E Content-Type=3A text/plain=3B format=3Dflowed
=3E =

=3E Marcello=2C
=3E =

=3E I=27m no expert here=2C but I agree that you can=27t tell a great de=
al
=3E about idle performance merely from the pulse width=2E The only map
=3E I=27ve seen is for the old D-Jetronics Bosch/Lucas 3CU (Jaguar v12)=2E=

=3E The overall PW range is between 3 and 10 ms=2E I don=27t have a PW
=3E meter=2C but on an oscilloscope I can barely see any difference at a=
ll
=3E in the idle PW as I change the idle fueling adjuster=2E I think the =

=3E problemis adjustments are in the order of 10=25=2C which is only abo=
ut =

=3E 0=2E3 ms=2E
=3E =

=3E In my case I hope to gain some diagnostic insights by looking at =

=3E the pulses=2E
=3E Not sure yet if I will or not=2E=2E=2E
=3E =

=3E Ed
=3E =

=3E =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
=3E FREE pop-up blocking with the new MSN Toolbar =EF=BF=BD get it now! =

=3E http=3A//toolbar=2Emsn=2Eclick-url=2Ecom/go/onm00200415ave/direct/01=
/
=3E =

=3E =

=3E ------------------------------
=3E =

=3E Message=3A 2
=3E Date=3A Wed=2C 01 Dec 2004 10=3A19=3A21 -0800
=3E From=3A =22Jag Man=22 =3Cjag=5Fman653=40hotmail=2Ecom=3E
=3E Subject=3A Re=3A =5BDiy=5Fefi=5D Pulse width meter
=3E To=3A chrism=40cnx=2Enet=2C diy=5Fefi=40diy-efi=2Eorg
=3E Message-ID=3A =3CBAY12-F111439391458864D7B96CDAEBF0=40phx=2Egbl=3E
=3E Content-Type=3A text/plain=3B format=3Dflowed
=3E =

=3E Thanks=2C Chris=2E
=3E =

=3E Just got a note from Steve Ravet=2C the person who did the project=2E=
 =

=3E He =

=3E implemented
=3E it and tested it on a project board=2C both on the bench and on his =

=3E car=2E Had =

=3E some
=3E problems with tests on car=2C he believes due to noisy or variable =

=3E conditions=2E =

=3E Also
=3E said the duty cycle output was questionable=2E=2E=2E code probably c=
ould =

=3E use some =

=3E tweaking
=3E in that area=2E Not sure if I=27m going forward with this=2C but let=
=27s =

=3E keep in =

=3E touch on it=2E
=3E =

=3E I still get no list mail in my inbox unless someone copies it =

=3E directly to =

=3E me=2C as you have just
=3E done=2E I did not sigh up for =22digest=2C=22 so i would expect to g=
et all =

=3E postings =

=3E individually=2C
=3E if the site is using conventional mail-list software=2E  What am I =

=3E dong =

=3E wrong=3F=3F
=3E =

=3E Ed
=3E =

=3E =

=3E =3E
=3E =3EI can=27t see why it wouldn=27t work=2E You might want to update =
the =

=3E PIC to a =

=3E =3Emore
=3E =3Ecurrent device like the 16F877A though=2E You might also have to =

=3E modify the
=3E =3ELCD control code depending on what LCD you use=2E
=3E =3E
=3E =3EAs for the list=2C postings have been pretty few and far between =

=3E lately=2C but
=3E =3Ethey should show up in your inbox=2E The archives are a wealth of=
 =

=3E information=3Ethough=2E
=3E =3E
=3E =3EI=27m going to try one of these over the christmas holidays I =

=3E think=2E I=27ll let
=3E =3Eyou know how it turns out=2E
=3E =3E
=3E =3EChris
=3E =3E
=3E =3E =3ESorry=2C I was referring to the microcontroller implementatio=
n =

=3E described=3E =3Eat the diy=5Fefi site=3A
=3E =3E =3E
=3E =3E =3Ehttp=3A//www=2Ediy-efi=2Eorg/diy=5Fefi/projects/pw=5Fmeter/
=3E =3E =3E
=3E =3E =3EHas anyone implemented  that circuit=3F
=3E =3E =3E
=3E =3E =3EI know it can be done with a scope=2C but it would be much ea=
sier =

=3E with=3E =3Ea special-purpose device=2E I also know it is part of the=
 =

=3E fuinctionality of
=3E =3E =3Esome digital multimeters=2C but they are a bit pricy for me=2E=

=3E =3E =3E
=3E =3E =3EI=27m a newbie here=2E  I was assuming this was a mail list a=
nd =

=3E therefore=3E =3Eexpected to get
=3E =3E =3Epostings in my mailbox=2E Guess the only way to read postings=
 is
=3E =3E =3Ein the Archives=3F Or=2C what am I missing=3F
=3E =3E =3E
=3E =3E =3EEd
=3E =3E =3E
=3E =3E =3E=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
=3E =3E =3EDon=27t just search=2E Find=2E Check out the new MSN Search!
=3E =3E =3Ehttp=3A//search=2Emsn=2Eclick-url=2Ecom/go/onm00200636ave/dir=
ect/01/
=3E =3E =3E
=3E =3E =3E=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
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=3E =3E =3Ediy=5Fefi mailing list
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=3E =3E =3E
=3E =3E =3E
=3E =3E
=3E =

=3E =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
=3E Don=EF=BF=BDt just search=2E Find=2E Check out the new MSN Search! =

=3E http=3A//search=2Emsn=2Eclick-url=2Ecom/go/onm00200636ave/direct/01/=

=3E =

=3E =

=3E ------------------------------
=3E =

=3E Message=3A 3
=3E Date=3A Wed=2C 1 Dec 2004 16=3A16=3A27 -0500
=3E From=3A =22jim cottrill=22 =3Cjim980=40frontiernet=2Enet=3E
=3E Subject=3A RE=3A =5BDiy=5Fefi=5D Pulse width meter
=3E To=3A =22=27A list for Do-It-Yourself EFI=27=22 =3Cdiy=5Fefi=40diy-e=
fi=2Eorg=3E
=3E Message-ID=3A =3C001101c4d7eb=24086a09f0=24bb132541=40DESKTOP=3E
=3E Content-Type=3A text/plain=3B	charset=3D=22us-ascii=22
=3E =

=3E I have done this with a Microchip 16f876 with a LCD display=2E It=27=
s =

=3E a bit
=3E different than the one Steve Ravet posted=2C the one I did used used=
 a
=3E pulse width and duty cycle measurement without interrupts=2E If you =
are
=3E into Microchip assembly code I can post it=2E
=3E I have only used it on the bench not on a vehicle=2E =

=3E If I had a digital camera I could post the circuit board=2E
=3E The code is pretty simple=2E
=3E =

=3E =

=3E -----Original Message-----
=3E From=3A diy=5Fefi-bounces=40diy-efi=2Eorg =5Bdiy=5Fefi-bounces=40diy=
-efi=2Eorg=5D
=3E On Behalf Of Jag Man
=3E Sent=3A Monday=2C November 29=2C 2004 10=3A47 PM
=3E To=3A diy=5Fefi=40diy-efi=2Eorg
=3E Subject=3A =5BDiy=5Fefi=5D Pulse width meter
=3E =

=3E Sorry=2C I was referring to the microcontroller implementation descr=
ibed
=3E at the diy=5Fefi site=3A
=3E =

=3E http=3A//www=2Ediy-efi=2Eorg/diy=5Fefi/projects/pw=5Fmeter/
=3E =

=3E Has anyone implemented  that circuit=3F
=3E =

=3E I know it can be done with a scope=2C but it would be much easier wi=
th
=3E a special-purpose device=2E I also know it is part of the fuinctiona=
lity
=3E of
=3E some digital multimeters=2C but they are a bit pricy for me=2E
=3E =

=3E I=27m a newbie here=2E  I was assuming this was a mail list and =

=3E therefore =

=3E expected to get
=3E postings in my mailbox=2E Guess the only way to read postings is
=3E in the Archives=3F Or=2C what am I missing=3F
=3E =

=3E Ed
=3E =

=3E =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F
=3E Don=27t just search=2E Find=2E Check out the new MSN Search! =

=3E http=3A//search=2Emsn=2Eclick-url=2Ecom/go/onm00200636ave/direct/01/=

=3E =

=3E =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=

=3E diy=5Fefi mailing list
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=3E =

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=3E =

=3E ------------------------------
=3E =

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=3E =

=3E End of diy=5Fefi Digest=2C Vol 15=2C Issue 2
=3E **************************************
=3E 

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