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I'll go do some field work - standby my friend.

You know, it certainly could be - possible oversight on my end. But I gave you the short note of the cat theft story... here's the detail: The morning my cats were stolen I went outside (7 am, cats still attached). I started the car and it was bogging out - THATS when I checked the plugs (as I...

Check the oil often on my trip, didnt lose anything; no smoke either. This must have been an issue that started once I got to Colorado. I checked the plugs - fouled black. These plugs were brand new, put them in right before I left.

Quite the series of unfortunate events. Last post I made, we fixed an air/fuel mixture issue and celebrated the completion of my engine install. After that, I drove that 99 D2 from Connecticut to my next duty station in Colorado. She made it 2000 miles... then some dirtbag cut off my catalytic...

Found the solution. I don't believe that this was one of those common Land Rover problems that we all know and love. After going through a series of diagnosis, cleanings and replacements (including but not limited to what all of you have noted), I bought and installed a different 04 D2 ECU -...

Sounds like a war. Hey at least when it comes back together, assuming it was the cam, everything should be pretty tight!... we hope. This issue is coming off an engine rebuild; I didn't notice any issues with my cam when I was in there. I'll go over it again, check for vacuum leaks and test the...

Alright, here's the report: kris812 - I read the O2s on my scan tool, the upstream driver was definitely out. I replaced it and they are reading normally. There was an improvement and, although the idle isn't quite right, it doesn't sound like its about to stall. I'm left with a MAFS fault code...

Id assume that kicks in at normal operating temperature?

I have codes for bad downstream sensors (which I knew, but haven't repaired yet because I didn't believe they would impact mixture/drivability) and a bad upstream bank 1. Its running very rough for the issue just to be a poor o2 sensor, at this point its barely idling. Id be surprised, but I am...

I think that's a reasonable assumption. Yes, I do have a flashing odometer. I switched around the key cylinder and instrument cluster to match, but it still flashes. I haven't had a chance to work on the truck over the weekend, but when I get back there I'll play around with swapping the BCU...

Another odd situation with that. I swapped both the ECU and BCU together and the car would not turn over at all - it likely had some sort of security wall. For the heck of it I tried the 99 D2 ECU with the 03 D2 BCU... It started and has been running since. I thought that was strange.

Thanks for the reply, Kris. Luckily my code reader maps engine functions - I'll check the MAFS and O2 responses and report back. Here's an interesting side bar on the ECU thing. The old engine had secondary air injection, the 99 (the one I put in) does not. I swapped the ECUs as well, so the...

Hey all, Just dropped a 99 D2 4.0 BOSCH into an 03 D2 I bought with slipped sleeves (figures). The install went well and she's running solid (God bless); now I'm wrapping up rather specific punch list items. At the moment she's running quite rich - it smells rich and the plugs are fouled black...

Update - thanks for your help everybody. Like most, here I am posting what happened months later. Cleaning the grounds fixed most of the faults, a new shuttle valve fixed another one. Only two of the wheel sensors were actually bad. Someone said it perfectly on here... one thing at a time. I...

Odd - I was using a Carsoft LR reader. It turned out the grounds were fouls, so the code was correct. Odd that the reader contradicts the RAVE.

I see they’re pretty inexpensive, I worry about quality at $30.00 only because the other times I’ve gone cheap on rover parts it’s come back to bite. Have you used a $30 one from ebay/does everything work alright?

Alright boys, I cleaned my ground up and found partial success. You’re right @discostew, those grounds were an absolute mess. Those 12 codes turned to 3. exactly what you had @mlnnc shuttle valve, right rear sensor and left front sensor. Can you expand on issues between the electrical connectors...

I agree about the sensors - it seems a bit radical to have all go out. I'll start with that ground, then search around for some shuttle valve solutions. I'll let you know what happens. Thanks for the reply.

1999 Land Rover Disco II BOSCH 4.0

This could be fun... I've had three amigos ever since I got my 99 D2 in 2017 (younger, broker, clueless). I've restored just about the whole truck at this point, now I just have to battle 3 Amigos. I started with the Option B bypass (ground one side of shuttle valve and splice other into the...