i have 1992 chevy 1/2 ton 4x4 has 350 in it in the when its cold it starts up fine al lthe time if u drive it around for while and turn it off and let it sit for few mins and try to start it back up it takes long time to start back up u have to hold the the key down few mins then finally starts back up

First thing you should check is to see if the injectors are dripping fuel, after you turn the engine off.

Have you checked for trouble codes? Does it have any codes stored?

ok it bogs down when u drive it to i turned it off look like the injectors did not drip at all but there wet big time and i nothing t ocheck to see if it has trouble codes

Here are some web sites with the basics on retrieving codes without a scan tool or code reader.

Poor drawing of ALDL but ok instruction + codes
http://www.cfm-tech.com/gm_tbi_trouble_codes.htm

OBDI terminal identification
http://robertpowersmotorsports.freeservers.com/images/ALDL_plug.jpg

OBDI illustration and instructions
http://www.troublecodes.net/GM/