85 Series 3 Inline 6 / 4.2 Mass Air flow Question
 

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until coming up with a better picture from the S57 Doc

Thanks Doug for the tip

What you're seeing, probably, is the 'cold running' modification, designed to prevent over-fueling when cold....although many have reported a general improvement in behavior hot or cold

XJ 6 Series III 4.2 - Cold Start EFI Overfuelling

I suggest using the wiring diagrams from the S57 Wiring Guide. It's in one of the sticky threads at the top of this section

Cheers
DD

Can't find S57 wiring guide that opens up to get to the MAF diagram

I did see the TSB on Cold Start EFI Over fueling on pin 6 and 8 with a 100uF capacitor

Hi, here are the links to Jose's main site ( the guide is under the "contact/manuals/links tab at bottom ).
Jag Upgrades Home

Here's the direct link to the manual download.

https://static.secure.website/wscfus...ries-3-xj6.pdf

All thanks to Jose, nice to have a digital version to backup my paper copy purchased years ago.

Cheers !
Brian

Thanks Kudzu ,

Found the area of interest on page 53

which will make a much better picture