Engine Performance problem
1989 Ford Ranger 6 cyl Four Wheel Drive Manual 57,xxx miles
I have been troubleshooting for months and cant figure it out. Im an avid mechanic and cant get the problem fixed. The truck starts and idles fine but, while driving I have no power and it wont rev past 3000rpm. It wont rev past 4000rpm with clutch engaged. I hace replaced: Fuel filter,plugs(gapped),wires,air filter,MAP sensor,Throttle Position sensor,Idle Air Control valve,TFI-IV Ignition Module(on distributor),Coil, PCV valve and also done fuel presssure test(40psi at idle,37psi at 3000rpm)NO vacuum leaks.Sometimes it will start up and die but, turn switch on-off a few times and it will run but still hesitates while driving. I ran codes and get code 11(System Pass). New Mello-Tone single exhaust. No odd smells, 93 octane run in it since new. I dont think the Catalytic Converter would be the problem since only 57,xxx original miles but, problems started 1 month after exhaust work. My only culprits would be ECM or Catalytic Converter, everything else has been replaced. Im hoping you have an answer because I cant figure it out. Thanks
1989 Ford Ranger 6 cyl Four Wheel Drive Manual 57,xxx miles
I have been troubleshooting for months and cant figure it out. Im an avid mechanic and cant get the problem fixed. The truck starts and idles fine but, while driving I have no power and it wont rev past 3000rpm. It wont rev past 4000rpm with clutch engaged. I hace replaced: Fuel filter,plugs(gapped),wires,air filter,MAP sensor,Throttle Position sensor,Idle Air Control valve,TFI-IV Ignition Module(on distributor),Coil, PCV valve and also done fuel presssure test(40psi at idle,37psi at 3000rpm)NO vacuum leaks.Sometimes it will start up and die but, turn switch on-off a few times and it will run but still hesitates while driving. I ran codes and get code 11(System Pass). New Mello-Tone single exhaust. No odd smells, 93 octane run in it since new. I dont think the Catalytic Converter would be the problem since only 57,xxx original miles but, problems started 1 month after exhaust work. My only culprits would be ECM or Catalytic Converter, everything else has been replaced. Im hoping you have an answer because I cant figure it out. Thanks
Mar 11, 2009 at 12:37 AM
