VSS importance

[David A. Cooley]

Jeff,
Pathfinder is made by OTC... It's the new software they run inthe OTC 4000E
scantool.
Diacom is a software package for a PC with a cable from the parallel port
to the ALDL connector of the car...
The OTC 4000E is about $3000, diacom is about $300.00

The hunting idle could be from the 350 chip... It's expecting a certain
amount of air moving through the engine at idle, but it's not seeing it...
Makes it harder to adjust the IAC as it's not optimally tuned for the
smaller displacement.  The 305 chip should help.



At 09:28 PM 9/30/98 -0400, you wrote:
>Thanks for the info, a friend of mine has a scan tool called a "Pathfinder"
>is that what you mean by a diacom?  If so i'll try that, i think you can
>put it in limp in mode with that tool.  By the way, when it is in open loop
>mode, the engine will idle up and down very slightly, could the 350 chip be
>the cause?  I am considering buying a 305 chip.  Thanks alot, this is a
>good list and i am glad to see that there isn't any of the flaming you see
>on some of the other lists.  Jeff
>
>----------
>> From: peter paul fenske <ffnsp955 at bcit.bc.ca>
>> To: diy_efi at efi332.eng.ohio-state.edu
>> Subject: Re: VSS importance
>> Date: Tuesday, September 29, 1998 11:40 PM
>> 
>> CHOMP
>> 
>> Hi Jeff
>> 
>> I might put the truck into backup mode using diacom to see
>> if it will run. It prob won't but if it runs normally well all
>> is okay.
>> 
>> I would get the calpak from a wrecking yard or a dealer if
>> I was worried about backup working.
>> 
>> take care:peter
>> 
>> Ps cal for 350 is a wee bit richer at idle when it drops outa
>> closed loop. smog might be harder.
>> 
>> 
>> idn't change the calpak.  The computer was in an 88 Astro Van with a 4.3.
>
>> >I have heard that it only uses the calpak in limp in mode.  Is this
>true? 
>> >Sorry to be so elementary on such a high tech list, but i am just
>getting
>> >started. 
>> >
>> >				Thanks, Jeff
>> 
>> 
>> CHOMPPEE>
> 
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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
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