1994 Ram 250, adjust air/fuel on carb
frolicgfx
06-05-2007, 07:42 AM
My van failed emissions due to high CO, assuming that it's burning rich, I went to adjust the air to fuel mixture on the carburetor and I can't even find the adjustment screws to do so. Normally they are on the front of the carb right? Seems a dumb place to put them on a ram van, as it would make them impossible to reach, but even still, I have looked through with a flash light and don't see them, and I have removed the engine cover and air filter and don't see them on any other side either.
Anyone know how to adjust the fuel-to-air on this thing?
Anyone know how to adjust the fuel-to-air on this thing?
alloro
06-05-2007, 08:22 AM
They're sealed and not adjustable.
frolicgfx
06-05-2007, 08:48 AM
They're sealed and not adjustable.
Ok, so is there any way to reduce the CO output other than this?
Ok, so is there any way to reduce the CO output other than this?
alloro
06-05-2007, 09:56 AM
High CO= Rich condition, CO is from partially burned fuel.
Common Causes:
-High fuel pressure
-Leaky injectors
-Faulty temp. sensor
-Thermostat stuck open
-Clogged air filter
-Sticking choke
-High float level
-Leaking accelerator pump or power valve
-Charcoal canister full, fuel to topped off, faulty purge solenoid
-Fuel in the crankcase
Common Causes:
-High fuel pressure
-Leaky injectors
-Faulty temp. sensor
-Thermostat stuck open
-Clogged air filter
-Sticking choke
-High float level
-Leaking accelerator pump or power valve
-Charcoal canister full, fuel to topped off, faulty purge solenoid
-Fuel in the crankcase
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