[Gmecm] Re: Gmecm Digest, Vol 7, Issue 25

Wed Sep 21 20:47:58 UTC 2005

well, everything is OK now.
 I took a good sensor from a friend. connected it to my jeep, and the result
was still 4.4 volt.
 So I checked again the connector and I found that the ground pin was bent.
 Now I remember that when I took the system at the junk-yard, the owner
could not figure where this connector was belong, and He tried to manipulate
it, with force , to another sensor.
When I noticed that, I stoped him, but apparantly, it was too late.
 I straightened the pin. and now every thing works allright.
 thanks for the help, guys.
 Hanan.

 On 9/21/05, gmecm-request at diy-efi.org <gmecm-request at diy-efi.org> wrote:
>
> Send Gmecm mailing list submissions to
> gmecm at diy-efi.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.diy-efi.org/mailman/listinfo/gmecm
> or, via email, send a message with subject or body 'help' to
> gmecm-request at diy-efi.org
>
> You can reach the person managing the list at
> gmecm-owner at diy-efi.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Gmecm digest..."
>
>
> Today's Topics:
>
> 1. MAP troubleshooting. (Tali Orlov)
> 2. RE: MAP troubleshooting. (Steve Ravet)
> 3. Re: MAP troubleshooting. (Darryl M Gilbert)
> 4. Re: MAP troubleshooting. (Darryl M Gilbert)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 21 Sep 2005 13:32:53 +0200
> From: Tali Orlov <tashutali at gmail.com>
> Subject: [Gmecm] MAP troubleshooting.
> To: gmecm at diy-efi.org
> Message-ID: <5f6dfc0e050921043272f8585c at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> HI all.
>
> I am now in the process of converting my Jeep CJ8 carbureted 258 to EFI.
>
> I bought at the junk-yard TBI system from GMC Safari truck, 1989 , 4.3 V6
> .
>
> I connected my laptop to the ECM with ALDL I/F , and I saw that the MAP
> sensor was giving a constant value. 4.4 Volt.
>
> I did not connected the MAP sensor vacuum port to the TBI yet because I am
> waiting for the manifold adapter, but I gave vacuum to the sensor with my
> mouth and also by connecting it with a hose to the bottom of the
> carburetor,
> below the throttles.
>
> no response from the sensor.
>
> The junk yard owner gave me another Map sensor but the results are the
> same.
>
> I also checked the signal voltage with a multimeter and I get a constant
> 4.4 volt.
>
> There is 5 volt reference signal to the sensor.
>
> Do I do something wrong or I got two bad sensors?
>
> Thanks.
>
> Hanan.
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> http://lists.diy-efi.org/pipermail/gmecm/attachments/20050921/3e7107ae/attachment-0001.htm
>
> ------------------------------
>
> Message: 2
> Date: Wed, 21 Sep 2005 09:13:06 -0500
> From: "Steve Ravet" <Steve.Ravet at arm.com>
> Subject: RE: [Gmecm] MAP troubleshooting.
> To: "Tali Orlov" <tashutali at gmail.com>, <gmecm at diy-efi.org>
> Message-ID:
> <DBB2E4C4173F1749B6C74341406117838B7141 at NASDAQ.usa.Arm.com>
> Content-Type: text/plain; charset="US-ASCII"
>
>
> From: gmecm-bounces at diy-efi.org
> [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Tali Orlov
> Sent: Wednesday, September 21, 2005 6:33 AM
> To: gmecm at diy-efi.org
> Subject: [Gmecm] MAP troubleshooting.
>
>
> HI all.
>
>
>
> I am now in the process of converting my Jeep CJ8 carbureted 258
> to EFI.
>
> I bought at the junk-yard TBI system from GMC Safari truck, 1989
> , 4.3 V6 .
>
>
>
> I connected my laptop to the ECM with ALDL I/F , and I saw that
> the MAP sensor was giving a constant value. 4.4 Volt.
>
> I did not connected the MAP sensor vacuum port to the TBI yet
> because I am waiting for the manifold adapter, but I gave vacuum to the
> sensor with my mouth and also by connecting it with a hose to the bottom
> of the carburetor, below the throttles.
>
>
> ----------------------------------------------
>
> If you are sure you've wired the +5, ground, and signal wires correctly
> then it sounds like you've got 2 bad sensors
>
> --steve
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 21 Sep 2005 12:38:57 -0400
> From: Darryl M Gilbert <dgilbert78 at juno.com>
> Subject: Re: [Gmecm] MAP troubleshooting.
> To: tashutali at gmail.com,gmecm at diy-efi.org
> Message-ID: <20050921.123858.-142435.1.dgilbert78 at juno.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello: double check your wiring to the sensor. doubt if you have 2 bad
> ones in a row, but possible i guess
> Darryl..
>
> On Wed, 21 Sep 2005 13:32:53 +0200 Tali Orlov <tashutali at gmail.com>
> writes:
> HI all.
>
> I am now in the process of converting my Jeep CJ8 carbureted 258 to EFI.
> I bought at the junk-yard TBI system from GMC Safari truck, 1989 , 4.3 V6
> .
>
> I connected my laptop to the ECM with ALDL I/F , and I saw that the MAP
> sensor was giving a constant value. 4.4 Volt.
> I did not connected the MAP sensor vacuum port to the TBI yet because I
> am waiting for the manifold adapter, but I gave vacuum to the sensor with
> my mouth and also by connecting it with a hose to the bottom of the
> carburetor, below the throttles.
>
> no response from the sensor.
>
> The junk yard owner gave me another Map sensor but the results are the
> same.
>
> I also checked the signal voltage with a multimeter and I get a constant
> 4.4 volt.
> There is 5 volt reference signal to the sensor.
>
> Do I do something wrong or I got two bad sensors?
>
> Thanks.
>
> Hanan.
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> http://lists.diy-efi.org/pipermail/gmecm/attachments/20050921/8ae16ab5/attachment-0001.htm
>
> ------------------------------
>
> Message: 4
> Date: Wed, 21 Sep 2005 12:57:32 -0400
> From: Darryl M Gilbert <dgilbert78 at juno.com>
> Subject: Re: [Gmecm] MAP troubleshooting.
> To: tashutali at gmail.com,gmecm at diy-efi.org
> Message-ID: <20050921.125733.-113817.1.dgilbert78 at juno.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello: On your MAP sensor itself where the plug plugs into it is marked
> with the letters C B A, this is the numbers of the pins. Pin C should
> have +5 volts on it (measured from ground). Pin A is the reference (or
> ground, this ground goes to the ECM) Pin B is the output signal to the
> ECM. You could use a voltmeter with very sharp probes and probe through
> the wire insulation to make contact with the wire to verify this. If you
> probe say from a good ground to pin B and apply vacuum to the MAP you
> should see a change if you get enough vacuum applied. They can also be
> tested with a small hand held vacuum pump. The MAP is very important in
> having your TBI set up work properly. Something wrong with the MAP sensor
> or MAP ckt will give you all sorts of fits.
> Good luck
> Darryl...
>
> On Wed, 21 Sep 2005 13:32:53 +0200 Tali Orlov <tashutali at gmail.com>
> writes:
> HI all.
>
> I am now in the process of converting my Jeep CJ8 carbureted 258 to EFI.
> I bought at the junk-yard TBI system from GMC Safari truck, 1989 , 4.3 V6
> .
>
> I connected my laptop to the ECM with ALDL I/F , and I saw that the MAP
> sensor was giving a constant value. 4.4 Volt.
> I did not connected the MAP sensor vacuum port to the TBI yet because I
> am waiting for the manifold adapter, but I gave vacuum to the sensor with
> my mouth and also by connecting it with a hose to the bottom of the
> carburetor, below the throttles.
>
> no response from the sensor.
>
> The junk yard owner gave me another Map sensor but the results are the
> same.
>
> I also checked the signal voltage with a multimeter and I get a constant
> 4.4 volt.
> There is 5 volt reference signal to the sensor.
>
> Do I do something wrong or I got two bad sensors?
>
> Thanks.
>
> Hanan.
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> http://lists.diy-efi.org/pipermail/gmecm/attachments/20050921/1049f7dc/attachment.htm
>
> ------------------------------
>
> _______________________________________________
> Gmecm mailing list
> Gmecm at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/gmecm
>
>
> End of Gmecm Digest, Vol 7, Issue 25
> ************************************
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.diy-efi.org/pipermail/gmecm/attachments/20050921/04b73f7d/attachment.html 