Jeep 4.0 Liter MPI (circa 1987-1991)

[Simpson, James H]

Hi,

I have a 1987 Jeep Cherokee 4.0 Liter MPI engine installed in a 1982 Jeep
CJ7.  I have discovered that AMC used a Renault (Renix?) computer system in
the 1987-1991 Cherokees, and that information on this computer system is, so
far, impossible to obtain.  I'm having some troubles starting the engine; it
cranks for several seconds (15-30) before it starts, if it starts at all.
I've been through all of the static tests (sensor resistance/function, fuel
pressure, etc.) and everything looks OK.  I've been looking for information
on computer codes and commands with no success.

Q. Does anyone have information on the Renix computer system?

Q. Is it possible to retrofit a different computer system to this engine?
Has anyone done this?  I guess GM would be my first choice.

Thanks for any help you might be able to give!

Jim Simpson