1990 chevy 1500 w/t

Discussion in 'Chevy C/K Truck Forum' started by bonehead79, Nov 17, 2009.

  1. bonehead79

    bonehead79 New Member

    someone please help i have a 1990 w/t chevy 1500 pu,4.3 tbi m/t , it all started one day and the truck started to hesitate and never been the same since and i have changed almost every part on the system,it keeps coming up code 45 its a rich code,but the truck put me broke lol,I have put these parts new,rebuilt computer,o2 sensor,plugs,wires,new distributor,coil,map sensor,tps sensor,iac sensor,and the fuel pressure is 13 psi at all times,3 sets of injectors,cat converter,computer chip,Im so fustrated i dont know what to do someone please help.Buy the way when the service engine light comes on the truck runs excellent all help is appreciated
     
  2. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    OBDI code 45

    Related info:

     
  3. booger57

    booger57 New Member

    If the EGR valve isn't working properly it will cause a rich condition to occur. I replaced the distributor, plug wires, and plugs. I finally gave up and took it to the dealer. Now my truck runs real good after the EGR valve was replaced.
     

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