DIY_EFI Digest V3 #492

[Joe Boucher]

Here's a guess.  Back in the carb days you could have a problem with the number 5
cylinder stealing some of the fuel charge from the number 7 cylinder, leaning out the
number 7.  With fuel injection at the intake valve, that shouldn't be that bad of a
problem.  There are crankshaft vibration considerations of the firing order that are
orders of magnitude above my head.

Joe Boucher
'70 RS/SS Camaro  '81 TBI Subrban  ('87XR4ti?)

> From: EFISYSTEMS at aol.com
> Date: Thu, 22 Oct 1998 03:28:53 EDT
> Subject: New Chev Firing Order
>
> Hi Folks,
>       While working on this 99 Chevy truck I found they changed the firing
> order from 18436572 to 18736542......since it is coil on plug I only found
> this out by checking the camshaft....does anyone know why the firing order
> change and is the 98 vette the same???????
> - -Carl Summers