p0171 , p0734 ... These are most likely bad MAF ?

p0152 , p0135 , p0155 ... These are bad O2 sensors on the exhaust ? Should I just change the 02 sensors or is it possible my cats are bad?

p1171 ... Vacuum leak ?

The above codes are what comes up when I scanned the motor. It does not overheat and it seems to run pretty good. Where do you guys think I should start when trying to fix up the vehicle?

I do not have an ABS scanner, so do you guys think I should scan the ABS codes before trying to fix the CEL codes? I'm hoping the three amigoes can be fixed by doing the SVS wire fix that is stickied, but if something is seriously wrong then I may think twice about bringing this Disco back to 110%...

 

I would start with a MAF to correct the 734, 171 and 1171 and replace either the 2 front or all 4 02's based on your mileage.
Don't guess with the ABS, there are 16 things that will throw their codes, get a scanner.

 

I found a vacuum leak...



It is the hose with the red clip on it going into the head. Any idea of how I can repair this ?

 

Thank you very much. I did previously clean the MAF with CRC Cleaner however I don't think it helped at all.

The mileage is 116k , low for its year but still high mileage. I think I might want to replace all four, should I go ahead and replace the cats with some cheap high-flo cats while I'm at it? I don't want to replace the o2's only for them to foul later down the line due to bad cats.

 

I'm having a problem trying to find the correct MAF part number...

I'm not sure if its
ERR7171W or MHK100800W

I have a 1999 Land Rover Disco II with 4.6l auto.

 

For the MAF, try British Parts of Utah they have the correct Bosch MAF at a decent price.

Twistid, I wouldn't worry about replacing the cats unless you have have them seriously over heat from a bad injector or take too much coolant from a blown head gasket.

 

Thank you, I sent them an email asking for pricing on the MAF plus 4 o2 sensors.

Do you have any idea of how I can fix the vacuum leak in the image I posted? I think I will need to get a whole new vac line, however I'm not sure where it goes to ... I tried to follow it , but it went behind the motor and it was kind of dark out. Could I simply RTV the crack , or use superglue ?

 

Where exactly is the leak, on the pipe or the red fitting?

 

On the pipe, not the red fitting.

 

Can you seal it with a little silicone glue and a wrap of electrical tape, if not, you will need to buy a new hose or figure a way to splice a in a section of rubber fuel hose.