any advise????
ok so i have a 2000 disco 2 100k started running a little rough. it has a small exhaust leak and then all of the sudden check engine light starts flashing and i hear a very random knocking doesn't sound like ticking/lifter or rod or piston almost like the exhaust is knocking and no power very rough idle. when its cold it runs good (well a ton better). these are the codes coming up p0306,p0154,p0130 and p0139 the check engine light was already on. i was told an exhaust leak could not cause that bad of a running condition but could cause the o2 codes but o2 sensors should not make it run that bad????? anyone have any experience with this?
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I would check all wiring going to the O2 sensors for cracked, broken, pinched and burned wires. Wires could be burned or melted by exhaust leak. check sparkplug , sparkplug wire for number 6 cylinder if number 6 is really misfiring it sends unburnt fuel in exhaust where it burns and could make flames come out of the exhaust leak (not a likely possibility) If you want to know why it runs better cold look up: ' open loop and closed loop operation of fuel injection' . There are other possibilities but if Disco's cars computer is not getting signals form O2 sensors in bank 1 and 2 it will run bad. Got to go my boss walked in (I am at work )
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have someone hold a rag over the tailpipe and you should be able to hear the leak under the truck.
it wouldn't hurt to swap the number 6 plug and wire with another to see if the problem follows. do you know how long the codes have been their, have you ever cleared them before? |
OK thankyou. Will look as soon as I get home from work.
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They were just reset. Those were the first codes to pop up. I'll put the reader on it after work and let you know if more are there. Thanks.
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ok so now there are more codes p0130,p0155,p0161,p0135,p0300 im going to do exhaust gaskets this weekend and probably o2 sensors unl;ess people dont recomend doing that?? or maybe something else. im going to check o2 wires and #6 plug and wire and check to hear how bad the exhaust leak is. if you can think of anything else i can check i would appreciate the info. thanks again james and drow
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