[Gmecm] Vortec swap info needed

[Ne14RoxCJ]

I'm sure you're right. The data should tell a lot. What would the difference
be if I got the ECM re-flashed to a manual? I know the ECM doesn't support
the TH400, but what support does the TH400 need? Would the engine run fine
just not having a trans hooked to it, or does it expect to see some input
from the trans? If so, what does it need? Would changing the program to a
manual cal change the spark tables and other parameters? It's not really a
manual and (from what I've seen in the older stuff) the spark and fuel
tables are different for a manual. But, if we're getting it re-flashed
anyway, I'll see about getting that trans control removed. The install of
the ECM and wiring is embarrassing to look at. The guy spent well over $30k
in the last year building this buggy and it looks like he is really skimping
in this area. I just want to make it run like a chevy truck should. If we
can do it inexpensively, that would be great. The engine uses a MAF and no,
the engine light is not on. There isn't one installed. Its going to be a bit
of a project to make this thing right. Thanks for the replies.

Beau


-----Original Message-----
From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf
Of terry
Sent: Tuesday, September 13, 2005 7:07 PM
To: gmecm at diy-efi.org
Subject: Re: [Gmecm] Vortec swap info needed

the pcm will have to be flashed to manual trans if it
has not already been done, the vortec pcm doesn't
support the 400 trans.are you running a maf or is it 
speed density, is the engine light on, i believe data 
will tell the story
terry

--- Ne14RoxCJ <ne14roxcj at comcast.net> wrote:

> A friend of mine is having problems with his rock
> crawler. He built the
> buggy and put a Vortec 5.7l in it without any smog
> equipment, no AC, and a
> TH400 trans. Whoever he bought the engine and wiring
> from just hacked off
> the wires that weren't needed. I tried to hook up
> the Snap-on scanner only
> to find out that the data wires were also cut out of
> the DLC connector. The
> problems he is having is a lack of power. It idles
> great and in low range it
> crawl's fine (a geo engine would crawl great with
> the 4:1 t-case and 5.13
> gears). But when it gets revved a little, it starts
> cutting out. I know that
> we need to properly cap these un-used wires and I
> expect we will need to
> have the ECM flashed to get rid of the smog stuff
> and whatever else is not
> used. I haven't dealt with these later model systems
> yet, so can anyone tell
> me what else I'll need to do to make this a V-8
> again instead of the 4-cyl
> that it's acting like. I know that getting the DLC
> put back together and
> looking at the data is the first thing, but what
> else needs done if
> anything?
> 
>  
> 
> Thanks a lot in advance,
> 
> Beau
> 
> > _______________________________________________
> Gmecm mailing list
> Gmecm at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/gmecm
> 

_______________________________________________
Gmecm mailing list
Gmecm at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/gmecm