After doing exhaustive searches on here without finding the correct response i am throwing it out to you knowledgeable lot...


Basically, my car (2005 4.s SC) has developed a pretty severe lurching/hunting when on a gentle constant throttle and normally between 1250 - 1500 RPM you can see the needle fluctuating , it is happening at the everyday driving speeds. It feels as though the car is in a gear to high? . It really is quite noticeable and you can actually hear the engine hunting. if i give it full beans she pulls ok it literally only happens on gentle throttle at the lower end of the rev range.

Before I take it to the garage I was wondering if anyone had anything similar before and if so what the diagnosis was? Could it be a Tork convertor? She does need a service which is overdue but i am sure has nothing to do with the issues im having.

Please help as it is making my car practically undrivable

Ps, I had a Magnaflow Catback exhaust fitted a few months back and it seems to have happened since then. Could it be a tuning issue?

Thankyou for any response and feedback i get, it all helps

Has the car ever had a MegaFlush and new transmission fluid - it doesn't last for ever and in the 4.2 leads a pretty hot life with high underbonnet temperatures. The other thing could be that sensor wiring around the gearbox might have been disturbed when the exhaust was modified. Also there are reported MAF sensors getting oily and causing the rev fluctation symptoms you report 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
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Thanks for the reply Tim

The current mileage is 64500 I can't find any paperwork to say the gearbox had been flushed, My thoughts exactly regarding the wiring around the exhaust, again i cant see anything obvious having looked under there but you can never rule it out. Silly question alert.....Where is the MAF sensor ? and is it something a competent (ish) home mechanic can do?

There are some good independent LR garages in Essex. Search on here and Disco3 site for recommendations  Visitor from fullfatrr.com
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