XF Crossflow Idle issue

[X-F250 182]

Hey guys,

Been trying to get my ute to idle, but so far I've had no luck. I've put a carb kit through it, and it seems to run a lot stronger. But when the engine is at low speed it stumbles and dies. Any ideas?

 

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[SPArKy_Dave 8,869]

The Idle control solenoid is probably dead... I'd start there.

 

Take it out, pull the brass jet/insert off the end, then apply vacuum (sucking on it should work)

and the plunger should respond.

If you can't pull a vacuum and make it move, there's at least one of your problems.

 

http://www.ebay.com.au/itm/CARBURETTOR-2-STAGE-VACUUM-IDLE-SOLENOID-SUIT-WEBER-34-ADM-FORD-FALCON-XF-4-1L-6-/201439959805?hash=item2ee6c1dafd:g:qSUAAOSwU~FWC8Wr

[Valvebouncer 2,389]

Either as above or the idle circuit is blocked. When you had the carby apart did you blow out all the passages with compressed air?

Part of the old gasket could have easily lodged it self in the circuit as its so small.

 

 

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[bear351c 10,270]

Inlet manifold gasket is leaking. ?

[X-F250 182]

Thanks guys, I blew out all the passages before I put it on as the carb had been sitting under the house for a few years. Played around with the idle control solenoid and all seems good. The inlet manifold gasket is new, and seems to not be leaking... Could it have something to do with the Electric choke?

 

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[Valvebouncer 2,389]

If it's wound on hard enough it could "choke" the engine too hard. It should open up when you rev the engine.

I'm trying to remember ( it's been a few years since I rebuilt one of these) do you have access to the idle mixture screw or are they sealed from factory? I swear I had to drill out the plug to gain access or am I thinking of Japanese carbs??

 

 

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[X-F250 182]

If it's wound on hard enough it could "choke" the engine too hard. It should open up when you rev the engine.

I'm trying to remember ( it's been a few years since I rebuilt one of these) do you have access to the idle mixture screw or are they sealed from factory? I swear I had to drill out the plug to gain access or am I thinking of Japanese carbs??

 

 

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I've had the choke disconnected and held open and it'll stay running, but idles way too high.

 

It's tight, but you can get at the idle mixture screw. The newer Weber has a plug. I've turned the idle mixture screw all the way to the right then backed it off two turns like it said in the workshop manual.

 

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[Valvebouncer 2,389]

Ok, cool.

So if it's still idling high, it maybe still running on the high speed idle circuit which will use the progressive idle circuit (the next step up after idling).

 

The setting for the idle screw of wind all the way in and out 2 revolutions is like an industry standard for starting off, it'll get the car running but needs to be adjusted once the engine is up to normal operating temperature.

I'd get the engine warmed up, loosen the three screws on the choke housing and back it right off. Then once it's up to temp the idle should drop down to normal ( should do it really soon but anyway) then start with your idle speed screw, does it make a difference if you turn it 1/4 turn? If not, why? Are the linkages around the right way etc. once that's sorted go to the mixture, wind it out until the idle starts to dip then back in 1/2 a turn. If you can wind it out and it makes no difference it still isn't running on the idle circuit, somethings not right, re check assembly.

 

 

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[X-F250 182]

Fiddled around with the choke and idle speed screw and that seems to have done the trick.

 

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