OBD II LT1 Engine Swap Gotchas???

[Kurek, Larry]

Well, since I *have* a 94 Camaro, I can guarantee you that it does NOT have
post cat O2 sensors. These made their debut on 96+ OBDII cars. Mine is OBDI.
Other difference is that the F-body PCM uses only one knock sensor, whereas
the Y-body (vette) uses two. AFAIK, the ONLY time post cat O2's were used (Y
and F-body) was 96 up. 

Also, FWIW, there is a place called Casper electronics that makes the rear
O2 simulators. heard they work pretty well :)

TTYL!

Larry

> At 04:49 PM 2/2/99 -0600, you wrote:
> 
> >If you are swapping in the standard stock unmodified engine you will
> >only need to fake out the sensors that you aren't using, such as the
> >additional O2 sensors behind the cats.  Also I believe there are some
> >things that detect a loose gas cap, this will need to be faked out
> >also, and probably several other sensors of the same sort.   
> That is I
> >believe why they generally put a 95 pcm in, they don't have to worry
> >about it.   The 96 + pcm does have some nice features, it will count
> >misfires, but this is supposed to get rather confused if you 
> put a cam
> >that is too big in the car, and count alot of misfires and set SES
> >lights and such.   
> 
> I was on the Impala SS list for a while... The 94/5 
> pre-OBD_II pcm's still
> have the dual O2 sensors for each bank, pre and post cat.
> According to several list members, the 94/5 Vette and 
> camaro/firebird also
> had the pre-post cat O2 sensors.