What a poor day.

I am trying to get my Range Rover 4.0l SE to run with out coughing and spluttering.

Can't get MOT because it wont fast idle propally for emissions.

When cold, she will rev up quite nicely for a few minutes when warm she will muck about from 2250rpm and then at 4000rpm and wont run past 55mph.

I have replaced the Engine coolant temp sensor today and whilst putting the last thing on the MAF and hose assembly my thumb slipped and pushed the gauze in and broke it around the edge of about 30mm.

What a ****ing ****er!!!!

To my supprise it still started up.

Anyway, Prior to this balls up, I had this put on a Snapon Diagnostic tool and everything come out OK except the MAF 0V's was being read. We disconnected the MAF an it cut out, re connect and she start straight away and still read 0V's

I got to get another MAF, with the new one will this fix the problem I had with it coughing and spluttering?

no idea about the maf but you gotta change it anyway so wait and see,but when was the last time you changed the plugs/leads and the fuel filter if your car is pre 99 after that it wont have one (thor engine)

1998 - 4.0L Gems engine.

All new parts except HT leads. 2nd hand MAF in, still coughs and splutters.

Replaced Engine coolant temp sensor. no difference.

I can get it to rev all the way when cool on the road, as soon as it gets warm it plays up again, specially when going up long hills. floor the throttle is coughs and judders. reduce revs so it dont go over 2000rpm it is fine.

Next I will want to check fuel pressure.

Can't really tell if it is electrical or lack of fuel.

Thanks for your reply.

Mel