Long term fuel gain (trim)

[scooby-93]

I've read on here that the long term fuel trim should be around 128 is this true?

I had a ema light on so plugged rs tuner and it came up with front 02 sensor I observed the love data and it said long term fuel trim 146

fitted a brand new lambda sensor and no ema light and nothing present on the rs tuner either.... How ever long term fuel trim is now 152!!

Am I been stupid here or is there something a miss with the car?

Also so average mpg was around 30 before fitting new lambda

Thanks

 

[Dan@SJM]

When did you fit the new lambda?

 

[scooby-93]

When did you fit the new lambda?

Last night... With old sensor it was 146 then with new sensor it is 152, just drove a 60 mile round journey and average mpg ended up at 32.5 mpg mainly broads aswell however I did reset the trip before i set off

 

[Dan@SJM]

itll take a few hundred miles to correct itself.

 

[scooby-93]

itll take a few hundred miles to correct itself.

Ok thanks, am I right in thinking it should be 128 or there abouts?

Also fitted new rear and centre mounts and cat to manifold kit and now my centre box on my piper system is resting up against the heat shield and is vibrating rattling herendously its worse when you lift off as apososed to accelerating, is it safe to remove the shield above the centre box completely?

Thanks

 

[Gaverick]

Ok thanks, am I right in thinking it should be 128 or there abouts?

Also fitted new rear and centre mounts and cat to manifold kit and now my centre box on my piper system is resting up against the heat shield and is vibrating rattling herendously its worse when you lift off as apososed to accelerating, is it safe to remove the shield above the centre box completely?

Thanks

I've never had any problem running no heat shields.