mdawg32892
Newbie
Hey y’all I’m having a problem with my truck and I’m just shaking my head at this point. I’ve got a 1990 K1500 Silverado 5.7 tbi extended cab 4x4. I’m getting a service engine soon light that gives me a code 12,22,32,33 from what I understand that’s the throttle position sensor error (signal low), code 32 can be one of 3 things baro sensor circuit error/ egr circuit error/ map sensor signal open. I believe it’s the map sensor. Then finally 33 map sensor circuit error (signal high indicating low vacuum) I’ve replaced the throttle position sensor, throttle position sensor connector, map sensor (x2), map sensor vacuum hose, map sensor connector, egr valve/ gasket, and the idle air control valve. Sometimes when starting up it stutters and the check engine light comes on then it goes away and clears up. While driving it will be driving fine no issues at all and then it loses all acceleration just goes to an idle and when I pump the petal it will try and rev up but stop and almost die from not getting enough fuel and getting too much air. Over my head I’m assuming it has something to do with a short or a bad ground somewhere I guess it must be electrical just looking for someone with more experience than me or someone that’s had the same experience. I appreciate any help y’all might be able to give.