ignition timing/fuel/idle set up

[iamsilverfox 10]

right after flicking around for a bit and lots of searching im struggling to find some definitive figures on setting up a 1.8 kr. sorry if its been asked a bunch before but im struggling a little here. a few questions.

 

1. correct ignition timing? according to the vw technical handbook it's 6 ± 1 degree btdc.but i've read other places from 6 to 8?

so i disconnect the red plug, set the timing gun to 6 degrees and then do i point it at the flywheel or do i point at the mark on the crank pulley?

 

2. correct CO content. VW say it's 1 ± 0.5%. however i've read on other sites it's better to set it at 2%.

 

3. finally what order should i set these up? is it

-set timing.

-set co

-set idle

-turn off, reconnect everything a recheck?

 

 

thanks for your patience! :)

[cptkirk 10]

http://the-corrado.net/showthread.php?60692-whats-this-on-the-throttle-body

[davidwort 0]

Standard 1.8 16v corrado, no need to disconnect anything, simply get up to temp, make sure the rad fan isn't running and set the advance at idle to 6-7 deg. flywheel marks are more accurate, but putting a dab of white paint on the crank pulley and arrow on cam belt cover works pretty much as well.

Depending on the state of the engine, age, how coked up it is, whether it's had headwork etc. you may find you can advance as far as 8 degrees before you over advance and lose power and get pinking under heavy load, also worse in hot weather. Super unleaded will help here although some engines may pink on 95 at 6deg.

Once the timing is right, set the CO (friendly MOT tester?) and finally adjust the air bleed on the throttle body to set idle if needed.

It will idle sweetly when the CO is set best, anywhere from 0.5 to 2 is fine, again some engines prefer it on the richer side rather than set at 0.5

Best thing for sweet idle is new injectors though, worth pulling yours and checking the spray pattern at low air flap opening, otherwise you are trying to make up for poor spray pattern by tweaking the metering head, which will then never work at all ambient starting temps very well.

[iamsilverfox 10]

boom thank you very helpful.