94chevc1500
Newbie
Hello all. Finally got my truck out for a 200 mile drive. Check engine light kept going on and off through out trip and finally stayed on coming home. Codes 42 44 45 popped up. 42 was from my new distributor install. 44 and 45 was o2 sensor to lean and to rich so I sprayed brake clean around the tb spacer around the back and the intake gaskets. No change in idle. I covered the tb completely to see if I could hear where the vacuum leak could be coming from. It still ran normal covered in thick rags and my hands on top. Also I plugged the pcv just to be sure. Still ran normal. Could it be an internal vacuum leak?