Took off air cleaner and found that the hose coming out of the engine in squirting oil into the carb when it idles down, found too much oil, put in new oil and plugs. started misfire again after 10min.
if you have to pull the chock it means its not getting enough fuel, check fuel filterif you have to pull the chock it means its not getting enough fuel, check fuel filter
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There are various way to clean your carburettor:
First, buy a can of carb cleaner spray.
Start your engine.
[1]: Remove air filter and squirt cleaner into venturi, revving engine via throttle linkage (at carb) to avoid stalling.
[2]: Remove fuel inlet hose from carb and squirt cleaner directly into inlet.
Otherwise:
[3]: If very dirty, the carb may need to be removed by a mechanic and sent in to a professional company for service.
Check compression test minimum 125 psi and above with gas pedal down check fuel pressure and ignition timing, check idle speed valve PCV valve is on top of your rocket cover with a hose going to inlet manifold by hose vacuum hose leaking or loose .air filter ,or exhaust blockage .
Check for a vacuum leak around the intake manifold.You can use carb cleaner to find the leak the engine rpm will change when it sucks in the carb cleaner.Most likely its the intake manifold gasket but make sure to check all vacuum hoses.
The IAC; idle air control valve, controls idle speed. This may be gummed up or faulty. But first check for vaccum leaks. These can occur at hoses, fittings, oil cap, dip stick, gaskets. buy a can of spray carb cleaner and clean the butterfly valve and bore, IAC, and use the rest of the can to search for vacuum leaks; run the engine and give short squirts of carb cleaner to the items listed above. The engine idle speed will change when you spray on a leak.
First thing to check would be the base governor setting.This should be done by someone with small engine expertise.Can be fatal to engine and do bodily harm if not done right.Other things to check would be air leaks where carb manifold attaches to heads.Remove air cleaner assembly to gain access to carb linkage and manifold.You will need a can of carb cleaner to perform this check.Start engine and hold throttle at just above idle speed and carefully spray area where manifold attaches to head,do this on both ends of manfold and at carb base,area where carb mounts to manifold,if leak is present the engine will either die or their will be a change in rpm,s.If no leaks are found in these areas have carb cleaned,it is very likely there is dirt in the carb.You can do the same as above,start engine and hold throttle just above idle and spray carb cleaner into carb,engine will try to stall when doing this,only spray carb cleaner in carb while engine is running.If this doesn't help have carb cleaned and adjusted.Info from small engine tech with forty plus years experience.
your IAC idle air control sensor is probably gunked up and if it is so is your throttle body...also check all vacuum line for integrity..i found a bad hose going to my MAP sensor..both of this caused problems. Clean the IAC with throttle body cleaner not carb cleaner, and dont clean the map sensor its contolled by air vacuum, just replace the hose if found cracked, if its bad you have to replace it it cant be adjusted.
most likely an ignition issue like wires plugs or cap and rotor or even a coil. What we would first do is check compression to make sure the engine has the capability to not misfire. But generally when the car idles smooth but misfires under load it points to one of the above mentioned. . Being a 25 year old truck its anybodys guess sight unseen. You might just need a good tuneup
If u don't have a check engine light try this procedure to fix it. Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Are you sure your idle ports ( size of pinhole) in carb aren't plugged with something? What happens if it starts to die, and you give it a quick squirt of WD-40 , down throat of carb?
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