Engine Performance problem
2001 Ford F150 V8 Four Wheel Drive Automatic 164, 00 miles
My truck hesistates at 1700 rpms to 2200 rpms. I used to have codes po171 and po174. But fixed them by replacing the TPS. Also in the process I ended up replacing the MAF as well. The fuel filter has about 15,000 to 20,000 on it. Also, when its hot out the problem is worse. Any insight would be great. I'm thinking it might be fuel pump or pressure regulator, not sure though.
Saturday, July 24th, 2010 AT 4:30 PM