November 22, 201003 silverado 1500. the truck runs perfect when started. then when idling after a bit the check engine light comes on, then the light starts blinking, and then after that the trucks power seems to cut down like the dash lights and headlights dim, the rpms drop, and the truck seems like its going to die but it just idles funny. when drove the engine light blinks when accelerated hard. I have brand new plugs and wires yet problem occurs. any other suggestions what the problem is? when i took the truck in to get the exhaust worked on the tech cleared the codes and it drove perfect for a day or so then it started again, any suggestions?
November 23, 2010Before the tech cleared the codes, did he read them to see what is causing the problem? If not, I would suggest you take it into a place like Autozone that reads codes for free and see what it says. That might help solve your problem. It does kind of sound like it might be the MAF sensor.
November 24, 2010oh jeez, yeah i took her to autozone and it blew a lot of codes, like 13 or so. i know like 02 sensor and engine misfire were one of them that kept repeating, but i dont think the internals of the engine are messed up because it doesnt knock or anything, just feels like the wiring is bad. i also wonder if a fuel filter could cause this, since i bought the truck at 130k and put 50k without changing it. when i accelerate hard, and hit second gear i blow black smoke everywhere. i dont know if fuel might be getting restricted then come all at once or what?
November 24, 2010The O2 sensor could cause that as it does control fuel mixture.
November 25, 2010As said, o2 sensors, MAF, also check for intake and vacuum leaks