Do I need a new MAP sensor?

[Louis Baiani]

Reason maybe his acceleration is straight up to 5400 RPM.  You would think the
ECM would be able to find a dead one - but I suppose it would totally have to be
dead.  I'd try a vacuum test on it with a 5V power supply and a voltmeter, and
compare it to other readings from a MAP (usually written in your manual).
That's all I can say.

Louis

"Craig M." wrote:

> I just noticed some strange stuff with this car I've had for a month or two
> now.... it's a 90 vette, and the first MAP car I've had.
>
> I did some spirited Diacom runs, and noticed the MAP readings only went to
> 29 at the highest measurement. Having never owned a MAP car and not studying
> up on them yet, I didn't know if this was normal or not. Now I'm digging
> around and notice on Mike Davis' site some Diacom snapshots from his MAP
> runs and notice his MAP readings hit 96. Here's a couple pictures of what
> I'm talking about:
>
> My MAP Runs:
>
> http://www.corvetteforum.net/c4/marcho/images/29map.jpg
> http://www.corvetteforum.net/c4/marcho/images/29map2.jpg
>
> and Mike's MAP Run:
>
> http://www.eecis.udel.edu/~davis/gm-eproms/ecm_swap_730/map-test.gif
>
> Why would my MAP readings be so low? The car runs great. Do I need a new MAP
> sensor?
>
> Craig M.
>
> ----------------------------------------------------------------------------
> 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