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Old 08-21-2015, 04:41 AM   #1 (permalink)
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Default No Fast Idle Issue - F6A

This dropside pickup with canopy from Sendai has been with me for about 4 months now. This is not my first time to own a car and I am most of the time a hands own grease monkey.

The vacuum operated actuator for the fast idle is shut, and there are lots of vacuums lines that are disconnected. The AC idle up is working alright so I think the actuator diaphragm for the fast idle is either torn or leaking vacuum.

Will take some pics when got the time, but the question is; is the actuator easier to source out or do I have to replace the whole carb assy?
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Old 08-21-2015, 08:00 PM   #2 (permalink)
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Greetings! It depends what country you are in. This is a world wide forum, and supply changes by country.
Do you see the 2 bellows in the picture? Is one of these what U R talking about?
The are normally purchased with the secondhand carbs we get in Philippines.
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Old 08-22-2015, 03:08 AM   #3 (permalink)
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Thanks, from the picture, it is the one on the top that is not working. So I think its kaput.

I am from the Philippines, so basically, I have to purchase a 2nd hand carb rather than replace this one part?
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Old 08-22-2015, 06:01 PM   #4 (permalink)
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It depends if you can find a part or some junk shop type that will dismantle a used carb, Cebu area will not normally do that.
Theres a Manila parts dealer on here that claims he can get new, try him.
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Old 09-05-2015, 09:41 AM   #5 (permalink)
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The other week I have changed the oil on my carry truck and replaced the oil filter, and today I have replaced the spark plugs, air cleaner element and valve cover gasket.

The old plugs are wet, the gaps are small. I was into thinking that the A/F is a little rich. Is there anybody here willing to share the info and the steps to get the correct A/F mixture? I suppose I also have to check on the ignition timing as well. I am very much willing to purchase a timing light and learn to do it myself.

TIA.
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Old 09-05-2015, 04:17 PM   #6 (permalink)
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Quote:
Originally Posted by icegee View Post
I was into thinking that the A/F is a little rich. Is there anybody here willing to share the info and the steps to get the correct A/F mixture? .

A/F mixture for the f6a is the same "standard" procedure for all carburetor vehicles...

Its the big flat screw on top of the carb...

usually something like this (not exact steps)

Fully close A/F mix screw
turn 2-3 out
start vehicle and continue to adjust by ear/idle/rev until it sounds right and the exhaust is not billowing clouds of smog
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Old 09-05-2015, 04:21 PM   #7 (permalink)
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Found this..
https://www.suzuki-forums.com/suzuki-...iming-f6a.html
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Old 09-06-2015, 12:22 AM   #8 (permalink)
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Quote:
Originally Posted by savadious View Post
A/F mixture for the f6a is the same "standard" procedure for all carburetor vehicles...

Its the big flat screw on top of the carb...

usually something like this (not exact steps)

Fully close A/F mix screw
turn 2-3 out
start vehicle and continue to adjust by ear/idle/rev until it sounds right and the exhaust is not billowing clouds of smog
Thanks for all the responses.

The A/F mix screw I found out was 5 1/2 turns out. First I seat it back and set it to 2 1/2 turns, idle speed went down so I raised the idle speed a bit by turning the idle speed screw. The I did a plug reading. Ground electrode was white so I set to 3 full, idle speed was unstable. I turned back A/F mix screw to 2 3/4, idle went ok and constant. Used it to ran errands and will read plugs later.

Now the vehicle is smoky when starting especially when revving up. After a while smoke disappears when the engine is hot. Is it just a cold engine? or a leaking valve seal? This is rema Sendai unit and the rad fans are hot wired and I believe the thermostat was removed from the circuit.

Next thing to do is to replace back the thermostat if it is missing and let the tech's at Sendai return back the rad fans connected to the thermo switch.
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Old 09-10-2015, 12:38 PM   #9 (permalink)
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Just out of curiousity, have you done a compression test on it yet? If the compression is fine then it could just be leaky valve seals that is causing the smoke.

If it is whitish smoke at startup then perhaps you need to check your PCV valve.

Of course, if the smoke is sweet smelling, then that could mean you have coolant leaking past the headgasket.
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Old 09-11-2015, 11:26 AM   #10 (permalink)
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Quote:
Originally Posted by GamblerZ View Post
Just out of curiousity, have you done a compression test on it yet? If the compression is fine then it could just be leaky valve seals that is causing the smoke.

If it is whitish smoke at startup then perhaps you need to check your PCV valve.

Of course, if the smoke is sweet smelling, then that could mean you have coolant leaking past the headgasket.
There is no other way I can do a compression test for the cylinders. I will give the PCV valve a try to check, the smoke smells like burnt oil.
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