749 in a 749 - troubles

[Shannen Durphey]

Jeremy Gonyou wrote:
> 
> Sorry, Guys, but I have to revive this thread.
> 
>   When you last heard from me I had just tried a syclone bin in my 7730 (3.1
> DIS).  SES light, no codes.  The chip checked out ok so I figured bum
> Memcal, right?
> 
>   Just bought new a memcal.  Soldered in AMP socket, popped in STOCK chip.
> Same deal: SES light, no codes (Note: the car behaves this way with no chip
> installed at all). 

This is back up fuel, aka limp home mode. 

 Sometimes the car refuses to even start with the
> modified memcal.
> 
>   New hypothesis:  Ruining connections when testing memcal for continuity.
> 
>   Yes, that's all I've got at this point.  I'd really appreciate and ideas
> from the group.  Listed below is my procedure, maybe someone can pick up on
> a bone-headed mistake:)
>      Test unmodified memcal in car

Stock memcal works ok?

>      solder out stock chip
>      solder in AMP socket
>      burn stock data on a fresh chip
>      check pins for continuity (using a multimeter and solid core wire to
> get into the bottom end of the memcal)

How large is the wire?  Do you have continuity on all terminals?  Does
the fresh burned chip still read correctly?

>      pull ecm fuse and install newly modified memcal
>      reinstall ecm fuse, 
start car
Is your eprom the same type as the factory prom?  Did the factory prom
survive the removal process so you can try it now?  Silly question,
but is the eprom oriented correctly?
> 
> That's all...
same here.
Shannen
> 
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