1997 Ford SHO code P0171 and P0174 - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

EcHmAn1983 · 01-12-2006, 09:53

I recently had the spark plugs changed. I replaced the fuel filter. Changed the oil and filter. Because of misfire in cylinder one . Fixed that problem. Then went to start the car, RPM's around 500-800 surging then car dies. Just kept starting it giving it some gas, now the car doesn't die. While driving it at all speeds car hesitates kinda like a little jerking. When u come to a stop the RPM's will stay around 500-800 bouncing up and down. I know what could possilaby know what it could be. MAF sensor. 02 sensors. vacuum leak. Open to any suggestions PLEASE help

SHOZ123 · 01-13-2006, 20:00

Vacuum leak for sure. Check where the EGR attaches.

Do you have the cams welded?