Postby Sifujon » Sun Apr 09, 2017 7:26 pm
It was running rough at idle for quite some time but this week it started getting brutal and stalling sometimes. However over 2000 rpm it runs really smooth, so I don't think it's fuel or spark related - maybe I'm wrong. It's thrown codes P0171, P0400, P1400, P0325 so far. I removed and checked the vacuum and EGR function, all seems fine. The solenoid clicks too. It looks like a vacuum leak according to the live OBD2 scanner, the short and long-term fuel trims are +5-20%. Also the spark advance seems to be from +5-45, all over the place. I have recently replaced the MAF, fuel pump, cap, rotor, plugs, wires. All the vacuum hoses seem fine and after removing each and plugging the line to see how it affected idle, they all did nothing. I'm thinking maybe the distributor or O2 sensors are wonky.....any help is much appreciated!