Soooo.... It's an 04 disco I recently purchased with about 70000 miles. It's missfiring like nobodies business. I changed the coils, plugs, and wires with magnacores and bosch platinums last night. Same rampant missing accompanied by flashing to solid check engine light. Not sure where to go from here. Really need to get this thing running as it's my daily driver for now. I would welcome any advice you may have. Codes from autozone read as follows... p1300, p0308 p0303 p0305 p0302 p0300. I know these are from the same bank. I checked the fuses relays and connection into the side of the coil. I'm lost. Please help.

 

I know it is a full moon tonite in Augusta, but try to peek under the hood in a dark area and look for any arcs...

 

First, those are not all from the same bank. When showing those codes, how does it run both cold and hot? What octane gas are you running, have you tested your fuel pressure?

 

And since you did the work, maybe check to be sure a wire was not swapped?

 

Thanks for responding, you are the two of the people I was really hoping to hear from.
DiscoMike, I have not checked the fuel pressure, I will get in the rave and try and figure out how to do it today. I only use premium. It's pretty much the same hot or cold, as soon as I start it. When I said bank I must have used the wrong terminology, I was trying to say they're from the same coil.

Savannah, I'll check for arcing tonight and triple check my work when I get home.

If these things check out, crank position sensor? Upstream O2 maybe? I was thinking no on the head gasket because of them being on different sides...and because I might cry if it were a head gasket..... Thoughts...?
O, and any preemptive advice on checking the fuel pressure would be greatly appreciated. I think I saw a fitting for it while I was changing the upper plenum gasket but what tool and where might I find one?

 

No it is not the crank sensor, and I missed that it is coming from one coil, where did you buy your replacement from?

 

I think I see where you're going, please keep in mind this is the same problem and codes I had before I replaced coils wires ect.

Bought them from here.

Land Range Rover Discovery Coil Packs 99 00 01 02 03 04 | eBay

 

Alright gentlemen, just finished doing things. Checked wire routing, it was right but I'm glad I have the piece of mind. I did the old check for spark with an old spark plug trick. All were good (espicially #1, found out the hard way) except for #'s 2 and 3. 2&3 definitely have no spark.

 

And they come from same coil, so check the wire and connector to it.

 

Richard, send me your number and lets talk on this.