Hi everyone,

First off I want to say I looked and could not find any forums on this.

I have a 2004 land rover discovery and it's running ruff at idle. I have 90k on the truck I did the head gasket overhaul and ran great for 20k then this started happening. My check engine light does not come on but I read my codes anyway and found I had major misfire and o2 sensor bank 1 problems and a few ride along codes. First I thought CKP sensor, thats new and stilll nothing. Then I thought wires and replaced them and still misfires turned out I had bad wires. So I changed the wires and plugs. Magnecor 8.5 and bosch +4. I had the fuel pressure checked turned out injector 7 was clogged, replaced that fuel pressure fine. still running ruff oh and I run 93 oct in the truck. Idle sensor is fine aswell. Maf sensor in new. And today I checked my codes again and now I have cylinder 1, 3, 5, 7, and 6 misfiring the codes come up twice. and also the o2 sensors thats next on the list to change but that shouldn't cause the engine to misfire or am I wrong. Also someone told me this might be the Camshaft sensor but I'm not sure. Oh and I checked the fuses and relays and everything checks out fine no blown fuses or burnt smell. If anyone can help me I would greatly appreciate it. Cause I'm ready to give up!!! So please anyone with this same problem or any solution would be awesome!!! Thank you everyone in advance.

 

So today I rechecked the plugs and wires everything is fine clean and fitted the wires on correctly and still running like crap! I even used the Seafoam and drove it around for 30 mins. when I got back I let it idle and I starting hear a knocking noise, GREATTT... Is this one of the valves knocking??? Oh and I don't know if this is true but when I changed out my plugs I used the "anit sez" on the treads and heard if you use it, it will make the car misfire is this true??? If so can I just take them off and wipe them really good or replace the plugs and clean the inside of the whole of that anti sez??? Please someone anyone give me some feed back.

 

So now lets start over, give us the exact fault code numbers so we can help you instead of guessing.

 

anitseize will not make you plugs misfire, not unless you dipping them in the bottle before installing them.

 

You can unplug the cam shaft position sensor on the front cover, the ECU has a backup plan for that. If problem continues, this may eliminate the $300 sensor as a possible.

 

Until he gets us some current codes, we have nothing to work with.

 

Thank you all for replying I will post new codes after work in about 8 hrs. I really hope I can fix this truck because I love it, but it's giving me too many problems and just a while back I was thinking of doing some off roading with it. I guess I won't be experiencing that anytime soon.

 

Got out of work for lunch and scanned for codes here goes.

p1884
p0300
p0301 x2
p0303 x2
p0305 x2
p0307 x2
p0306 x2
p1319
p1300
p1129

I know one of those is O2 sensor so I'll order four new ones tonight or tomorrow depending on your guys advise. And heres something to run by you guys because I just talked to a good friend of mine from NC and he works on Land Rover all the time. He told me that he's 100% FOR SURE that it's the coil pack on the back, so I wanted to see what you guys think on this matter because I see alot of ppl from reading through the treads have this problem. Again thank you for you feed back.

 

hey guys just want to update you all on my truck I got the ignition coil packs yesterday and I just finished changing them and started it right up and she's running nice except for I think I might have a very small exhaust leak or its just those stupid O2 sensors which im going right now to get my truck scanned and see if they are still acting up. I'll let you all know what's going on after I come back.