Before i took my 96 z71 4x4 truck 350 ii took it to emissions and it failed the codes p1345 p0441 i found a spark plug wire was tore and a couple of vacuum hoses not connected so i replaced the wires, distributor cap and rotor now its missing, before i did all that it was running perfectly and strong just sometimes it would take a few cranks to start up somtimes right away should i replace the cam or crank sensor

Mot Smith

• 500 Answers
• Posted on Mar 13, 2011

SOURCE: i failed the emission test

check your spark plug placement on cap. cranking more than normal as in my case I changed fuel filter but in the end I had to change my fuel pump. Check pressure..if possible,,

SOURCE: I have a 1998 Z71

First thing i would do, is listen to all of my injectors with a stethoscope. If any sound different, then start there, however you hould have checked compression when your plugs were out. Pull them and check compression.