Hi guys I have a shudder when reversing and at 1500 to 2000 RPM I don’t really get a rough idle but can feel the shudder at slight acceleration I have no loss of power whatsoever gear changes are smooth. I connected IID today and at a steady drive of 40MPH I got these reads from each cylinder see images below. Am I right In thinking that the issue lies with cylinder 1 and 6 which are over fueling? Any ideas much appreciated. I’m also getting a squeaking rubbing sound from rear of car which seems to stop when I pull the handbrake on and off momentarily could the shudder be down to a sticking caliper also?
Cheers
J

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Yes - do a leak off test
Yes - check your rear brakes .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
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Aren't the compensation values telling you that actually 1 & 6 are closest to zero and optimum.
In fact the other 4 are being over fuelled to acheive the correct fuel delivery into the cylinder.

I would suggest they are due a service. It may run OK in most conditions but as you describe these readings are when cruising under light throttle. many people including myself have had judder under light throttle due to worn/clogged injectors.

a leak test may show you the 4 leak off more than the 2.

Hi I was under the impression that anything over a reading of 2 was a sign of overfueling? Range Rover Vogue SE 4.4 SDV8 SVO Stying Pack
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I’m no expert, but if it’s got to compensate loads, doesn’t that indicate an issue, as mentioned above?

So a low number, like it’s not having to compensate much, is good? 2011 Range Rover Vogue SE 4.4 TDV8

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2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
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1989 Ford Sierra XR4x4 2.9i
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This is a head wrecker I was told that any reading over 2 was an unhealthy faulty or dirty injector so why am I getting readings of over 600 on the other 4. Bearing in mind at idle I get all same 4 cylinders being 2 3 4 5reading over 600 and cyl 1 reads 2 and 6 fluctuating from 0 to 2. The reads I have submitted images for are at a steady run of 40MPH consistent for 5 mins. Could this be a wiring loom issue rather than injector? Range Rover Vogue SE 4.4 SDV8 SVO Stying Pack
Audi A4 2.7 TDI S Line Black Edition phantomn black
Previous Cars
Range Rover Vogue SE Overfinch Styling 22" Elara's full black stealth colour coded
Java black Range Rover sport 2.7 TDV6
Alaska white Range Rover sport overfinch 3.6 TDV8
BMW M3 Carbon Black

This came up when I did a google search.....

If it helps any?

https://forum.bmw5.co.uk/topic/87547-injec...any-ideas/ 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Suppose if you need to prove if it’s a loom issue, you’d maybe need to swap injectors round and see if the issue moves the injector orvstays with the loom. 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport