First off, this is my first post on here but I have read hundreds thanks for everyone's knowledge and willingness to share over the last 6/7 years.

1999 Disco II
172K miles, eng replaced at 142K

I have been having a nagging check engine light on for months
I have ran two seperate fuel cleaners one about 4 months ago and I am half a tank into another "techron"
I have changed spark plug wires 4 mths ago and
the coil pack that addresses cynders 4 and 7, 4 mths ago
Over the last 3 years changed all O2S2 sensors

Although the Innovia code reader doesnt have Land Rover codes
I am getting
P1300 (tried all the manf choices and it all points to ignitor etc)
P300 Random Misfire
P304 Misfire cylnder 4
P307 Misfire cylnder 7

My OBD2 live info
Fuel Sys 1 running CL turns to OL-Fault after CE lightFuel Sys 2 running CL turns to OL-Fault after CE light
STFT B1 S1 -4.6 thru 1.5 Idle before CE light 14.8
LTFT B1 8.5 thru 10.1
STFT B2 S1 -3.1 thru 3.1 Idle before CE light 14.8
LTFT B2 8.5 thru 10.1

MAF 1.1 thru 9.0 when revd up
ECT 203
Spark Adv 13
IAT 149
TPS 0

O2S2 B1 S1 0.14 thru .73
O2S2 B1 S2 0.816
O2S2 B2 S1 0.17 thru .60
O2S2 B2 S2 0.820

STFT B1 S2 NA
STFT B2 S2 NA

I am hoping to get some help cause gas is expensive and our local dealer really is terrible.

Best Regards and Thanks in advance!
Rich

 

What kind of ignition wires did you use? Some people have really bad luck with cheaper wires on these trucks, probably because of the high under hood temperatures.

How do the plugs for those cylinders look compared to the rest?

 

I got the Bosch Eng Wire Set $129 Atlantic British and a Bosch Coil

And I will try and check the plugs Sun 6/5/11 with 3 kids its tough to get the time in. Got to get it fixed though gas is "killing" me

Thanks
Rich

 

Bump help

 

You got your help.

CHECK THE PLUGS.

There is no magic alternative.

 

Update

I had two platinum head spark plugs so I swapped out cylnders 4 and 6 cause that was the two with the codes

No Change

I ordered 6 more arrived yesterday, swapped out the other 6 cylnders this am

No change

All were black but no noticable offensive issues with the removed spark plugs

The first two 4 and 7 were a little wetter but they were changed out 5 days earlier

I don't believe in magic alternatives but I do believe in asking for help from people that could have the knowldge to help me get through this without going to my local stealer

Help, Best Regards
Rich

 

I'd run a compression test.

Also, is it slow to start when it's been sitting for a few hours, like overnight?

 

Thanks for the response, do you think the rings might be bad?

And it starts up quick and easy even after a few days of sitting. I have been driving my Jeep a little more because of the gas gusling Disco.

Rich

 

Jafir, I just started wrestling a similar code combination and my truck is, in fact, slow to start once it's been sitting overnight - does that point you to anything specific?

 

It might point to bad or leaky injectors.... I'm not actually sure how common that is on these trucks. I'd try to hook of a fuel pressure gauge and see if the pressure drops while it's been sitting with the key off.