i have engine spuddering between 1000-2000 rpm under load. poor fuel mileage. and a bank 2 cat fault code
Country: United StatesMake: JaguarModel: e typeYear: 2002
snap on scannner
HelloI think that you may have entered the wrong model as E types generally don't have fault codes or V8'scould you confirm the model and the engine size and fuel type please?
sorry.. it's a jaguar X-type V6 ---3.0L engine
HelloOk I'd start by checking for exhaust leaks before the O2 sensors on each bank as if this has been experiencing an exhaust leak then it will have been running very rich as the sensor will see the extra air pulled in as fresh / lean fuelling and be adding fuel to compensate.this can lead to catalyst failure as the extra fuel can re-light inside and melt the catalystThe best way to find an exhaust leak is to run the engine from cold and feel around the exhaust joints with your bare hands - you'll have about 30 seconds before it all gets too hot and you should feel any escaping gas blowing over your fingers this could also be an air leak at the mass airflow meter - Any air dragged after the meter isn't 'seen' by the ECU and so not compensated for, causing rough running.Check the hose clips for tightness and inspect the trunking for any cracks or splits and also all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best way to locate a leak is to have the engine running and warm and then spray lighter gas around each joint in turn. If the engine rev's up you've found your leak.
Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
i was told that a maf. would be a great place to start however . i was also told that a fuel injector may also be the cause ????.... a muffler shop told me that i had week O2 readings but with out the P code he could not do any more for me. the dealership erased the codes on me before i could get them off the car.
Helloa leaking / misfiring injector could give this issue but check over what I've suggested 1st If this is OK then I'd check the condition of the injector plugs / connections as this could be a lean misfire if an injector isn't firing properly - the best way to check this is with a 'noid' light http://www.noidlight.com/