bigdaveh Posted January 19, 2014 Share Posted January 19, 2014 Hi All I have a 1.6 petrol focus its a 2005 (newer shape) i think i have a fuel issue. it brings up a fault code that's for to lean i have removed all fuel components under bonnet and cleaned them i also cleaned the throttle body and map sensor no change I did notice that when i dissconected the fuel line from the rail there was no fuel spilt or any pressure should there be pressure at the rail when car is not running i suspected the fuel was running back to tank but cant find a return pipe or pressure sensor for fuel system. i did find a pipe that runs back to the tank which is connected to the inlet manifold. this leads me to think there should be some vacum in the tank any ideas thanks in advance for any advice. Dave Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 19, 2014 Share Posted January 19, 2014 What is ur issue car not starting Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 19, 2014 Author Share Posted January 19, 2014 Hi Sorry Car starts and runs but when its just been started it will pull away fine then there is a power loss. it doesn't cut out but feels close it then gradfually returns to normal power and is fine until car is turned off and started again. then same issue. it also idles a little lumpy. thanks Dave Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 19, 2014 Share Posted January 19, 2014 Have u changed fuel filter I recommend change that an check fuel pressure should be 3.8 bar Quote Link to comment Share on other sites More sharing options...
JW1982 Posted January 19, 2014 Share Posted January 19, 2014 The Focus MK2/MK2.5 Petrol versions do not have a seperate fuel filter. There is only a strainer located in the fuel tank on the intake of the fuel pump. Quote Link to comment Share on other sites More sharing options...
artscot79 Posted January 19, 2014 Share Posted January 19, 2014 have you checked the plugs leads and coil pack as it sounds like its an issue with them not the fuel system Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 19, 2014 Author Share Posted January 19, 2014 thanks for advice guys how can i test fuel pressure as there doesn't seem to be a sensor on the rail or on the diagnostics i will double check the plugs etc too thanks again. dave Quote Link to comment Share on other sites More sharing options...
Mr Singh Posted January 19, 2014 Share Posted January 19, 2014 have you got any air leaks on the intake or any air leaks before the oxygen sensor in the cat? Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 19, 2014 Author Share Posted January 19, 2014 cant find any air leaks although it does take a gulp when reved Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 19, 2014 Share Posted January 19, 2014 What's exact fault code Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 19, 2014 Author Share Posted January 19, 2014 hi it p0171 system too lean bank 1 Permanent however it does go off for some time but eventually comes back thanks Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 19, 2014 Share Posted January 19, 2014 Check hoses from pcv valve an all vacuum lines see if u come up with anything could also be lambda sensor what mileage on ur car Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 19, 2014 Author Share Posted January 19, 2014 its on 81000 it has full ford history its had a recent full exhaust and cat although these are after market ones im not sure but i think lambdas are after market too i cant find any leaking pipes thanks Dave Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 19, 2014 Share Posted January 19, 2014 Are u 100% no hoses ripped what condition are filter in if how long ago u replace complete exhaust was it really really cheap replacement Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 19, 2014 Author Share Posted January 19, 2014 i will double check all hoses tomorrow its just had new filter exhaust was already fitted when i got car it certainly looks really cheap. its not leaking though thanks again Dave Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 26, 2014 Author Share Posted January 26, 2014 Update still no joy cant find air leaking anywhere a few things ive checked are removed and cleaned all plugs (one was obviously running lean so questioned injector) swapped the injector for the plug that was lean for one of the others with the hope that the lean pot would move also i will check this after a good run. ive also had it on the scanner. im questioning the fuel pump as it shows at either 0 or 100% nothing in between when the car is running its constantly at 100% (even while at idle) im going to check fuel pressure (what should it read both running and at idle) the long term fuel trim was above 25% so i think thats why mil comes on any more advice?? thanks Dave Quote Link to comment Share on other sites More sharing options...
bigdaveh Posted January 27, 2014 Author Share Posted January 27, 2014 Im going to test fuel pressure tomorrow can anyone tell me what it should read at idle running and while engine is not running Thanks Dave Quote Link to comment Share on other sites More sharing options...
mick85 Posted January 27, 2014 Share Posted January 27, 2014 Around 3.8 bar if it's way off u know ur problem here Quote Link to comment Share on other sites More sharing options...
eliaskok Posted January 27, 2014 Share Posted January 27, 2014 check fuel injectors, they might need replacement or clean Quote Link to comment Share on other sites More sharing options...
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