89 YB vs FB Prom Problem with AC

[Mike Rolica]

The pin out's are slightly different when it comes to the ac..
There is a a/c request that vette has that the  fb oby does not..
On pin B* there is a input for when the a/c is on..

There is also the a/c fan request on D11 that the vette has.. think this is
similar to the f-body one..
Mike Rolica
Plant A,
Magnesium Products Division
Strathroy

(519)-245-4040  Ext. 244



	-----Original Message-----
	From:	Shannen Durphey [SMTP:shannen at grolen.com]
	Sent:	Sunday, August 20, 2000 6:37 PM
	To:	gmecm at diy-efi.org
	Subject:	Re: 89 YB vs FB Prom Problem with AC

	Sounds like a pinout comparison is in order.
	Shannen

	Romans, Mark wrote:
	> 
	> Does anyone know if a 89 YB (Vet Prom) can be made to work in an
89 FB
	> (Camaro Firebird)
	> Both L98 Engines.  I have done a prom for a friend using my 89 Vet
prom as a
	> start and have got it
	> running rather well, EXCEPT that when he turns on his AC the
engine almost
	> dies and the
	> Check Engine light comes on and it stutters and sputters until the
AC is
	> turned off.
	> I went throught the "Air Fuel Mode Words" that are at C014, C015,
C016 and
	> C017 and Switched
	> the C017, Byte 5, Normally open fan request input from a 1 to a
Zero, but
	> this hasn't fixed it.
	> I am stumped, Anyone know?
	> Thanks
	> Mark
	> 
	>
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