Oxygen Sensor problem

[bahoebak]

Hello, new to site, I have a Disco 2 V81 with Multipoint LPG system, I have a misfire, having had the vehicle on a computer it is show a problem with "Bank 1" Oxy sensor, I have changed both sensors and the problem still remains. Whilst the computer was connected, the sensor was working periodically but showing no function for most of the time. I have pulled the insulation off the wiring where the LPG system wiring has been grafted onto the original wiring form the multiplug where the oxy sensor is plugged in. the wiring is sound and has been checked with a multimeter to confirm integrity. I have not checked continuity of the other wires from the multi plug for the original wiring. The multi plug is dry and oil free, bother sensors were nicely brown when removed. Can anyone tell me where to look for a common wiring connection problem or any other info' this is I am sure a wiring problem.

The truck had been running okay 'ish when purchased but one evening when raining I hit a puddle and soon after the truck seemed to have a new lease of life it appeared to have twice the original power. That was until the following morning when I guess it dried out and it was back to its old ordinary self.

I am pleased with the truck but this issue is driving me insane, I noticed that on another site a Land rover technician has suggested unplugging both sensors and appeared to be okay for the truck owner,

Is this a possible solution, please please can anyone help I need this truck to rerun properly.

Thanks Jerry

[jiginc]

V8 with Multi point LPG. Year 2000.

I had a similar problem with mine, miss firing between 1500 and 2500 rpm.

I tried lambdas, MAF, plugs, HT leads, even HT coils but no change. In the end I disconnected the Lambdas and it ran like a dream.Has been OK for the past two and a half years. No change in MPG or power.

Earlier this year I changed the recommended, very expensive, plugs for standard V8 ones and the power increase was very noticeable.

I understand that the only reason for the recommended ones are in order to extend the service mileage requirements but it's very difficult to adjust the gap for LPG, in fact they say the gap is fixed and should not be changed. Try a set of standard ones as for the D1.