Idle problems again

[lunap]

Having trouble with my idle. Until the engine fully heats up, my idle is low, even with the choke out. This causes stalling when I pull to a stop and shift into neutral - the slight friction of the clutch stalls the engine.
I have changed the airfilter, checked the plugs which look fine.
Any quick adjustments I could make to the carb without throwing it out of whack.
I repeat, once the engine is fully warmed up, which takes about 10 mins of driving, it runs and idles great.
1980 2F FJ-40

 

[Landpimp]

prolly the fast idle(or choke opener or one of those deals) on the carb is not working, its run off a BVSV/ thermo sensor(turns on/off at 80deg or 100) on the t-stat housing I think. So prolly not a carb problem in itself. Time to brake out the emmsion manual and start doing some testing.

these are the sensors I am thinking about

to test, on a cold motor try to blow thru the outer port, no air should pass out of the inner port. when warm air should pass. To test, just take off the hoses and hook up a long piece of hose so you can blow thru it.

as you can see both of those are new........because niether was working.

 

[65swb45]

In the area at the bottom of your accelerator pump pushrod [aka bellcrank] there should be an adjuster screw for the choke. By turning this screw in, you can lower the point at which the choke starts to bring up the idle with it.

If your carb is otherwise running fine, this is prolly all you need.

 

[johnnyb_s]

prolly the fast idle(or choke opener or one of those deals) on the carb is not working, its run off a BVSV/ thermo sensor(turns on/off at 80deg or 100) on the t-stat housing I think. So prolly not a carb problem in itself. Time to brake out the emmsion manual and start doing some testing.

these are the sensors I am thinking about

QUOTE]

Not to hijack this thread, but those sensors on my 78 2F are by-passed altogether. I have one hell of a time keeping it idling until is warms up. Can you send a pic of where those hoses should go to on the carb?

 

[Landpimp]

well thats not a good thing unless its all de-smoged. and no I can't send a pic because there is no way to take a pic of that side of the carb without taking way to much off, also a 78 will not be the same as a 82........so it wouldn't help.

but on a 82 one if for the dizzy advance(won't advance untill 80/100deg) the other runs the high altitude and some other crap on the carb I think.

prolly the fast idle(or choke opener or one of those deals) on the carb is not working, its run off a BVSV/ thermo sensor(turns on/off at 80deg or 100) on the t-stat housing I think. So prolly not a carb problem in itself. Time to brake out the emmsion manual and start doing some testing.

these are the sensors I am thinking about
]

QUOTE]

Not to hijack this thread, but those sensors on my 78 2F are by-passed altogether. I have one hell of a time keeping it idling until is warms up. Can you send a pic of where those hoses should go to on the carb?

 

[johnnyb_s]

It's desmogged. Thanks for the input.

 

[toddslater]

lunap,

I live out in Avondale, if you want drive it out and I'll see if I can bump that cold idle screw up for you.

 

[Pin_Head]

It's desmogged. Thanks for the input.

That may be the problem.

On early carbs there is a screw to adjust the cold idle speed when the choke is on. On later carbs, more and more of this stuff is electronically controlled. I'm not sure that it is electronic on an '80 up, but I cannot see a mechanical adjustment on the SOR pictures.

A lot of the stuff people mistakenly refer to as "smog control" is actually early electronic engine control and the engine runs better with it on and functioning.

 

[toddslater]

Pin and Pimp,

I was/am assuming since he is pulling a choke cable (mechanical set up) that there would be a screw to adjust the amount your opening your throttle plate. Is this not so on the newer ones ?

 

[Pin_Head]

I'm not sure about the later carbs. I can see the cold idle adjuster screw on the carbs through '78. On later ones it appears to be gone and instead has some kind of vacuum actuator.

 

[Landpimp]

on a 81+ there is just the idle speed and mix screw.......or is there a fast idle........hmm I think there is..........................its been a heck of a day..........so lets just assume I don't have a clue what I am talkin about

I'm not sure about the later carbs. I can see the cold idle adjuster screw on the carbs through '78. On later ones it appears to be gone and instead has some kind of vacuum actuator.

 

[toddslater]

I don't have the FSM for that year...but my haynes shows on pg 59, fig 3.40 a mechnical linkage choke with a fast idle adjusting screw. I'd look at mine but I jump from 73 to EFI 89.