I have a 2002 Chevrolet Silverado with the 5.3 engine. It has 106,000 miles. Last winter my service engine soon light was displaying 0171 and 0174. Fuel pressure was in specs. I replaced MAF, IAT, air filter and could find no vacuum leaks. Problem still there. I replaced fuel filter twice. No good. On cold mornings the truck would idle rough for 8-10 minutes then smooth out. No one could tell me anything else so I resorted to driving it and resetting the SES light every few days. After the weather warmed up in spring I have had no light all Summer. It has been 30 degrees for 2 days now and my light is back on with 0171 and 0174 showing. Fuel pressure tested right and I bought the MAF cleaner recommended by my parts store clerk but nothing changed. The truck runs fine after it warms up. Any help is appreciated. THANKS
have the same problem?
Wednesday, October 31st, 2007 AT 5:56 PM