Afm Retracking

[ATK 137 1 Cars]

Whats the easiest way and will this help cold start issues?

[nveeate 78]

Carefully remove lid (selaed on with silicone), loosen the three screws holding the circuitboard (make sure you get the right sized screwdriver, as the screws can be tight and they easily round), move circuit board slightly until the copper bit is on a new bit of track, then tighten up and re-seal lid.

 

I'm not sure how much, if any, difference it'll make to cold start issues though. I cleaned the SAD, fitted a new vac advance unit and then reset ignition timing (which had presumably been set to accomodate faulty vac advance), and adjusted fuel mixture and idle. It now starts really well, and idles nicely from cold....did them all at the same time, so not 100% sure which made the difference!

[ATK 137 1 Cars]

That easy huh? Do the circuit board holes have enough room to be able to move it or did you need to drill arger holes?

[nveeate 78]

That easy huh? Do the circuit board holes have enough room to be able to move it or did you need to drill arger holes?

 

There should be enough movement...it only needs to move by 1mm or two.

[nveeate 78]

Pic attached.

[ATK 137 1 Cars]

Great thanks, that makes it very clear. Do the two tracks on yours indicate its been retracked before?

[nveeate 78]

No, the copper piece is split into two connection points (presumably to increase the certainty of contact).

[nveeate 78]

I'd check with others more knowledgeable about whether a worn AFM could affect cold start issues first though if I were you....I'm not sure that it would be a likely cause.