[Gmecm] TBI conversion

[Jay Vessels]

Hi there!

I *think* I've seen later model CCC cars ('86 Caprice 305 Q-jet
specifically) that had *both* but it's been 10 years since I looked at
one so I can't say for sure. I could easily be misremembering that.

I have never seen a GM EFI engine with a BARO sensor (a MAP sensor 
referenced to atmosphere). I can't say with certainty of course but I'd 
bet money all GM EFI systems starting in the '80s all have MAP sensors 
if they have anything at all.

Jay Vessels
1982 Chevrolet S-10 Sport, 2.8V6 TBI
1984 Chevrolet S-10 Blazer Sport, 2.8V6 (TBI pending)

davesnothereman at netscape.net wrote:
> 
> 
> 
> -----Original Message----- From: bcroe at juno.com To: gmecm at diy-efi.org
>  Sent: Thu, 30 Nov 2006 11:09 PM Subject: [Gmecm] TBI conversion
> 
> 
> My understanding is EFI cars have true MAP sensors, but CCC engines 
> have a sensor referenced to air pressure (as opposed to absolute zero
>  pressure), is that right?
> 
> Bruce Roe
> 
> I don't believe this is universally true across all carbureted 
> vehicles.  It's been a few years since I needed to remember Carby Car
>  details, but I believe later CCC vehicles moved toward MAP sensors.