Changed spark plugs and wires , now car wont stay running. it will turn over but then immediately chugs and dies. help

First you must determine if the fuel is stopping or the spark is stopping..If the fuel is stopping this could be a computer problem.. If the spark is stopping then it could be the IGN Module in the distributer. or any nomber of sensors. Squirt a little fuel directly into the Throttle body on the intake manifold.. If the truck runs longer its probably loss of fuel.. Do this several times to make sure, be careful and only use a small amounty of fuel.. you do not want a fire.. RE: Spark: Take a plug wire and an old plug..put the wire on the plug.. hold the plug against a good ground .. have someone crank the engine .. does the plug stop firing? The engine dies.. and will not restart for a minuet or so.. during this "no start" time do the plug test. If the plug will not fire during this time take the module out and take it to Orillys Auto parts.. They can test it.. really expensive part. Don't replace until you know it is BAD..

run fault codes and check for MAF/MAP and VAF sensor problems

Check or replace all your fuel filters. Check for water in your fuel. Drain your tank and replace with 93 octane fuel. Also check your spark plugs.

idler pulley siezed when hot. on the way off, the belt took out some wiring

try pulling the vacumn pipe off the EGR valve

idle air control valve, maybe.

Sounds like a security problem that is preventing starting. It will run for a few seconds and then die.

the timing may be out

Sounds like the system lacks fuel pressure, check the fuel pump pressure.

maybe the starter or wire connections are bad? see if theres a way to turn the engine manually so you know it's not locked up...make sure the spark plug wire is off!