Idle Struggle To Adjust

[Juttie205 123 2 Cars]

I have throttle stop screw not even touching and the idle screw is screwed all way in and throttle cable is not tight so not pulling butterfly open and i cannot seem to get it to tick over under 1000rpm air leak or sad not working right?.

[ATK 142 1 Cars]

Yep air leak probably. Even with sad not working you should still be able to adjust to 1000 rpm

[ATK 142 1 Cars]

Heres a setup guide:

 

Strip all the pipework out from the manifold back, take off all pipes etc. Take off the cold start valve, AFM, throttle body, air filter housing etc. Clean them all out with carb cleaner etc and refit making sure everything is tight and no holes or leaks etc.

 

Then try setting it up as follows (this is assuming your other components spark plugs fuel pump etc are all good):

 

1. warm engine up (until rad fan kicks in) and stop

 

2. turn AFM air bypass screw fully out (weaken mixture)

 

3. turn throttle air screw fully in (Larger screw on the throttle body)

 

4. Unscrew throttle stop screw so the throttle plate only just about 'clinks' against it when returning to rest position. start engine and set throttle stop screw (smaller screw on throttle body) to 600rpm (650rpm on 1.6)

 

5. turn throttle air screw out until RPM achieves required idle speed (900rpm +/-50rpm)

 

6. richen the mixture on the AFM by turning the screw in until the desired CO reading is achieved (1% - 2%) which will raise the RPM

 

7. turn the throttle air screw in until RPM is lowered back down to required idle speed in step 5

 

8. stop engine and adjust Throttle position sensor (on side of throttle body - rotates) to idle switch stop position (pin 2 and 18 continuity on a multimeter). Best way to get this done roughly is that to turn the TPS on the side of the throttle body so it just clicks as the throttle returns to rest.

 

Then set your ignition timing. For ignition timing don't bother with a light, wind the dizzy until it pinks in a low gear up a hill, then back it off slightly. You might need to wind the air screw in or out after doing the ignition timing.

 

If idle is still high either your ignition timing is too far advanced, you have an air leak or your cold start valve (SAD) is not closing up. You should be aiming for around 1400rpm idle when cold and 950rpm when warm. I set mine to 1000rpm when warm as it drops to 950 due to electrical load when lights fan etc is on.

Check your ignition timing isnt too far advanced as well

[Juttie205 123 2 Cars]

Strange as thats guide im following and i cannot get to

650rpm think i will have to start from scratch.

[welshpug 1,661]

if the screw isnt touching the throttle stop and the idle is up then its the tps holding it open

[Juttie205 123 2 Cars]

Ah didnt think of that.