Calpack verification

[Shannen Durphey]

Ignition module timing will be at base until 2000-3000 rpm, than will ramp up
extremely quickly through 20 or more degrees.  If you're watching with a light, it
sometimes looks like it's at base, then it's advanced with nothing in between.


Matt Sandine wrote:
> 
> I will do that to see if the timing is 'normal' in limp home. From what I
> read, it is just a few degrees advanced from the module itself. Then I know
> the problem really does exist...
> 
> Good news! My manual shows the pinout for sensor ground D10 as being :
> "Power Ground ?" It actually had the ? mark. Key on, engine off says it
> should be 0 volts. I am getting a feedback on that line though. It ties into
> the MAF, Coolant sensor, MAT sensor...those show OK on the scan tool, but it
> might be a live ground. Exciting! Thanks again, -Matt-
> 
> >
> >A disconnected O2 sensor won't put the ecm into limp. The limp
> >mode is reserved for major malfunctions. In limp mode the ign
> >module controls timing.
> >
> >To test limp mode pull out the eprom or create one with a checksum
> >error, then see if engine runs.
> >
> >BobR.
> 
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org