Modern 4.2&5.0 Engine management & layout document.

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J44EAG

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Modern 4.2&5.0 Engine management & layout document.

Postby J44EAG » Wed Feb 22, 2017 8:44 pm

This is one heck of a read for those with 4.2 or 5.0 litre cars whether supercharged or naturally aspirated. Ever wondered what and where all those sensors lived and what they do? The answers are here and in very great detail. All about Lambda sensors, cats, EGR valves, etc, etc.

180 pages of V8 detail. Allow about three hours to read. To get the hang of it all, you will need to read it several times! https://www.google.co.uk/url?sa=t&rct=j ... -blUCOoZRA

Mike K
X350 Co-ordinator

2004 XJR

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BrianG

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Re: Modern 4.2&5.0 Engine management & layout document.

Postby BrianG » Thu Feb 23, 2017 12:42 pm

A really useful find Mike. I've just downloaded a copy - just the thing for a wet afternoon's reading! :D
Brian
X350 3.5 V8 Sport Premium in Midnight / Ivory
Previous XJs:
X350 2.7 TDVi in Westminster Blue / Barley
X308 4.0 V8 in Meteorite / Warm Charcoal
X300 3.2 in Spruce / Barley
XJ40 3.2 Sport in Gunmetal / Saville Grey

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BrianG

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Re: Modern 4.2&5.0 Engine management & layout document.

Postby BrianG » Thu Feb 23, 2017 6:03 pm

A very interesting read this afternoon. Cor! that 5 litre engine is a bit OTT isn't it? I did not realise that as well as the usual VVTs it has two sets of inlet cams and can switch between them for best economy/power. The repair man will love that!

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J44EAG

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Re: Modern 4.2&5.0 Engine management & layout document.

Postby J44EAG » Thu Feb 23, 2017 10:13 pm

Yes, the five litre is a huge advancement on the 4.2. Another generation advancement. Not the sort of engine to have in bits without good cause. The 4.0 and 4.2 are daunting enough.

There is one particularly good illustration in the document. It shows the 4.2 with all sensor locations shown. Very useful indeed especially as the paper also gives operating functions and electrical/electronic perimeters.

The diagram of the M112 function is schematic and a little confusing in paper format. Equated to the "cowhorn" manifold, the drawing becomes easier to understand.

I`d say this document is probably the most important we have yet seen for the 4.2. It answers so many questions.

Mike.
X350 Co-ordinator

2004 XJR


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