Some basic questions

[jkooser at impsat.com]

> I have read that you won't like how a carb gas tank works in an EFI
> vehicle.  Carb tanks don't need baffling since the bowl takes care of
> buffering fuel.  EFI tanks do since there's no equivalent of 
> a bowl.  So
> you might consider getting a fuel tank from a later model EFI 
> suburban. 
> I know there were some years of your body style that were EFI.  It'll
> also have a return line fitting, etc.  No problem then with a factory
> style in tank pump either.
> 

Any idea of what year Subs had EFI?  Or a reference for fuel tank
interchangeability between models?  If the van tank fits, I'll be set.

> I know the answer to this is no.  747 won't do the electronic
> transmission.  All it understands is TCC lockup, if you start with an
> auto bin versus a manual.  You'll need a later ECM, I think '92 or
> later, to do an electronic transmission.  But I wouldn't worry about
> that at first, get your 747 conversion working.  The ECM and 
> trans have
> to go together -- a P4 that can control the trans wouldn't be 
> happy with
> your THM400.
> 

Okay, that's what I suspected as well from reading the ECM listings.  What
about differences in the connectors between the '747 and a later model that
can do the transmission?  Are there any - i.e. am I going to have to totally
redo my wiring harness when I get ready to swap?  P4, what's that?

Thanks,

Jake Kooser
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org