mattcreate Posted December 11, 2012 Share Posted December 11, 2012 Hi there, I´ve got a 99 fiesta MK4, 1.3 petrol which has been at the "mechanics" for TWO MONTHS, now I´ve brought it home because it´s doing my head in,and I´m determined to fix it myself . Symptoms; poor idling,rough running, burning huge amounts of petrol and stinking the place out. Done so far; new throttle sensor,new idle air valve,replaced e.c.u, and watching useless mechanics scratch their heads for two months, any ideas? Matt Quote Link to comment Share on other sites More sharing options...
oilburner79 Posted December 11, 2012 Share Posted December 11, 2012 I'm presuming they checked the plugs,leads and coil pack? Quote Link to comment Share on other sites More sharing options...
mattcreate Posted December 11, 2012 Author Share Posted December 11, 2012 yes they did, tried an alternative coil pack and leads, checked the plugs are sparking,etc. Thanks,matt Quote Link to comment Share on other sites More sharing options...
mattcreate Posted December 11, 2012 Author Share Posted December 11, 2012 By the way, the diagnostic computer insists the fault lies in the throttle sensor (replaced), and the engine will only start/run with the vacuum hose disconnected ( the small one behind the inlet manifold ). Quote Link to comment Share on other sites More sharing options...
Steve Posted December 11, 2012 Share Posted December 11, 2012 Is it injection system or carbs? Quote Link to comment Share on other sites More sharing options...
mattcreate Posted December 11, 2012 Author Share Posted December 11, 2012 Sorry, it´s fuel injection, and it´s not the injectors because they tried a replacement injection ramp,no difference. Quote Link to comment Share on other sites More sharing options...
DieselPig Posted December 11, 2012 Share Posted December 11, 2012 Too much fuel may indicate the ecu sensors are faulty, have they replaced/tried the engine temp sensor/MAF/lambda sensor? Quote Link to comment Share on other sites More sharing options...
mattcreate Posted December 11, 2012 Author Share Posted December 11, 2012 Thanks Dieselpig, to be honest I don´t know,but I´ll certainly check up on that ,after I find out where those sensors are. That would explain why the diagnostic computer is giving confusing readings (?) Quote Link to comment Share on other sites More sharing options...
sambooka Posted December 11, 2012 Share Posted December 11, 2012 Thanks Dieselpig, to be honest I don´t know,but I´ll certainly check up on that ,after I find out where those sensors are. That would explain why the diagnostic computer is giving confusing readings (?) MAF mass air flow is located on the pipe that comes from the air box. Not sure on the other two Quote Link to comment Share on other sites More sharing options...
DieselPig Posted December 12, 2012 Share Posted December 12, 2012 Lambda sensor is in the exhaust pipe near the catalytic converter, engine temp sensor will be near the thermostat in the engine block. Quote Link to comment Share on other sites More sharing options...
mattcreate Posted December 12, 2012 Author Share Posted December 12, 2012 Thanks, I´ve found the MAP sensor and the Lambda sensor, the IAT sensor I think needs some digging around under the air filter ( it´s not anywhere on the intake tube or manifold) and the engine temp sensor will need some digging around but now I know where it is ,or should be. I´ll let you know what I find, Cheers! Quote Link to comment Share on other sites More sharing options...
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