Hi, I have a land rover discovery 4ltr V8 X Reg (year 2000) and was a great 4x4 until several months ago!
We started to notice power loss, when requesting power the revs would get to around 3000rpm then stop! She would also sometimes miss fire and judder.
So we did the normal new sparks plugs and leads but no difference, then one day she broke down and would not move! The RAC came out and there said the car had a right hand bank failure and suspect compression/head gasket issue.
So as a result we had the car booked in to a land rover garage there did some tests, to cut a long story it seemed we had a blocked CAT which was due to an over heat and also a compression fault within the engine, then to top that all off a bent manifold! Caused by the overheat! Oh Joy!
So 4 months later after an engine rebuild! Crazy?? We had the following done
New Cat
New Ignition Leads and sparks (again)
Valve repair to the Cylinder Heads
New manifold
New coil packs
New O2 bank sensors on both banks
She was now rebuilt and running again! But wait there is more . The land rover diags show that the car was not also firing evenly on all 8 cylinders!???! And as a result would some times judder or miss fire! (The same as several months ago! Surely not this again!! )
So back to the garage the car went and there did a complete electrical test including the ECU and there found that the ECU was not working correctly (something to do with the fuel trims) which the ECU controls . I was also told that the ECU learns this information and the ECU will try to of set any issues that happens with the car such any the miss firing etc, as a result the ECU would still be thinking the car has miss fire issues and the only way to fix this is to drive the car for 500miles while the ECU re learns and programs to the correct fuel trims of my car!!?? (Can this really happen?)
So my question has anyone ever heard of this? Or had the same problems!! Many Thanks
We started to notice power loss, when requesting power the revs would get to around 3000rpm then stop! She would also sometimes miss fire and judder.
So we did the normal new sparks plugs and leads but no difference, then one day she broke down and would not move! The RAC came out and there said the car had a right hand bank failure and suspect compression/head gasket issue.
So as a result we had the car booked in to a land rover garage there did some tests, to cut a long story it seemed we had a blocked CAT which was due to an over heat and also a compression fault within the engine, then to top that all off a bent manifold! Caused by the overheat! Oh Joy!
So 4 months later after an engine rebuild!
Crazy?? We had the following doneNew Cat
New Ignition Leads and sparks (again)
Valve repair to the Cylinder Heads
New manifold
New coil packs
New O2 bank sensors on both banks
She was now rebuilt and running again! But wait there is more . The land rover diags show that the car was not also firing evenly on all 8 cylinders!???!
And as a result would some times judder or miss fire! (The same as several months ago! Surely not this again!! )So back to the garage the car went and there did a complete electrical test including the ECU and there found that the ECU was not working correctly (something to do with the fuel trims) which the ECU controls
. I was also told that the ECU learns this information and the ECU will try to of set any issues that happens with the car such any the miss firing etc, as a result the ECU would still be thinking the car has miss fire issues and the only way to fix this is to drive the car for 500miles while the ECU re learns and programs to the correct fuel trims of my car!!?? (Can this really happen?) So my question has anyone ever heard of this? Or had the same problems!! Many Thanks
