I keep getting codes 1171 and 1174 about every 20 miles that I drive. I've replaced the MAF sensor but still get the error codes. It occansionaly also gives a misfire code for cylinders 3, 5 or 8. Lost as to what to do next. PLEASE HELP ....

BIG g
2000 DII 114,000 miles

 

when was the last time you did a maintenance on your truck? what type of MAF did you install? was it a Bosch MAF in a Land Rover box? are you running high octane fuel only? do you have 8mm magnecor wires? bosch +4 plugs?

 

At 91,500 I had the heads rebuilt, new Bosch 4+ plugs, Magnecor 8mm wires. At 112,000 I replaced all 4 oxygen sensors (the ones from Atlantic British) because I was getting O2 errors. Shortly after the oxygen sensor replacement I started getting the 1174 and 1171 errors. I replaced the MAF (Bosch one from Atlantic British). Did nothing to fix the errors. The frequency is much shorter between codes now. Today I got 4 in about 45 miles. I got the truck with 81,000 on it and have always used premium gas. I have no idea as to what to check next. HELP!!

 

intake gasket is probably leaking by. I would have the vehicle smoked to make sure there are no leaks.

you have an air leak.

 

agreed. smoke test that sucka.

 

Thanks for the pointer. At the risk of sounding dumb, what is a smoke test and where do I take it to get tested?

 

tagged

 

Land rover dealership could do it. They will pump smoke into your intake and see where the leaks are.

 

no no no... you can find a mechanic that will do it at half the cost or less than the dealer. or you can do it yourself with a cheap fog machine from a party store. try and get a colored liquid fog to make it easier to identify where the leak is.

 

ah sweet idea.