Advertise on fullfatrr.com »

Home > LPG > 4.2 map sensor feed?
Post Reply  Down to end
Page 1 of 1
Print this entire topic · 
Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 1912

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver
4.2 map sensor feed?

Hi all - so my 4.2 supercharged only plays nicely on gas until about 4000rpm so we have it switch over then which seems ok.

After that the power goes weird about 5000rpm sporadic and bouncing up and down hence switching now at 4K

Anyway looking at something entirely different today and I notice the vacuum feed for the aeb map sensor is drilled into and then the hose connected to the right hand air cooler.

I may be sounding like I don’t know what I’m talking about here but whilst doing some other bits on the car and having issues it occurred to me that this is not always vacuum and at around 4000rpm+ it would have switched from being vacuum to being boost - which I am assuming is not what the map sensor is looking for?

Am I right or wrong? If I’m right where do you get your true vacuum feed from?

Thanks!


 Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #602513 1st Aug 2021 6:49pm
View user's profile Send private message View poster's gallery Reply with quote
dingg1



Member Since: 29 Jun 2013
Location: PORTUGAL
Posts: 958

2007 Range Rover Vogue SE 4.2 SC V8 Stornoway Grey

Hi Dan

Looking like your installer Censored up and thats leading to your issues, that section will be under boost pressure, last time I messed about with the map sensor on mine the vacuum line line looked as if it tied into the inlet side of the throttle body, but I didn't trace it all the way to the tie in point tbh

Hth

Post #602556 2nd Aug 2021 8:28am
View user's profile Send private message View poster's gallery Reply with quote
Danwilderspin



Member Since: 15 Jun 2016
Location: Cambridgeshire
Posts: 1912

United Kingdom 2007 Range Rover Vogue SE 4.2 SC V8 Zermatt Silver

Thanks I think that it should T into the bypass actuator looking at it I think if I buy a brass T and just move it I should be good although it will likely need a retune and that part blanking off Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Post #602559 2nd Aug 2021 9:14am
View user's profile Send private message View poster's gallery Post Reply
Post Reply  Back to top
Page 1 of 1
All times are GMT + 1 Hour

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2021 Futuranet Ltd & Martin Lewis


Switch to Mobile site