My navman 5500 doesn't show my present map area but every thing else seems ok can the cmap cards go bad? ive sprayed them with contact cleaner but doesn't do any good

SOURCE: Navman 5500 tracker

Navman 5500 does not support C-MAP MAX maps.. only C-MAP NT+ maps.

SOURCE: updated map card for my navman icn320?

you can get the updated map card here
http://www.37signals.com/svn/archives2/garmin_nuvi_350_insanely_recommended.php

SOURCE: Navman s30 3d 2009 map update is useless

You should be able to install your old map from the DVD/CD that originally came with your Navman - you don't need a Product Key for this, even if it prompts you for one.

It appears that the commercially available 2009 map for the S-Series does *not* cover the S30 3D, just the non-3D versions, although that's not at all obvious from what's on Navman's web-site, so you have my sympathies if you bought it expecting it to work...

SOURCE: navman 5500 gps backlight dim but set to max

Its water ingress causing a short in the high voltage wiring PCB.

Open the unit with a 1.5mm allen key, unscrew the power/data cable sockets with a spanner and GPS antenna inlet with an 8mm socket (NA to i models) .

Where water has arced there will be burning black on the green PCB evident, cut the PCB wire and remove the section around the burn.
solder a new wire to bypass the short.
Dry the unit and seal with silicone to prevent re occurrence.

Its a 2 hour repair requiring a high DIY soldering standard but off set it against the time it will take to reload you waypoints in a new plotter , its well worth the trouble.

DAKA

SOURCE: no power under acceleration 2001 chevy impala,ive added injector cleaner , cleaned maf,also checked cat ,seemed good, also replaced map sensor

well it is a chevy, its always had that problem. Haha, just kidding. But, seriously, it can be something as simple as a clogged air filter. I did all that you did on a car I had, and then, I replaced the air filter that I thought was good (reusable K&N) and it ended up being that. Try the air filter. Either replace, or clean it.