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If tune up needed would cause idle shake poor fuel even clogging injectors can cause it as well as wires coils air filter etc if vehicle hasnt had a tune up give one
If you do not have a check engine light on or one flashing you do not have any cylinder misfiring going on. I do not know which engine you have but the common causes of shake ore engine and transmission mounts are defective, exhaust system is stressed due to an impact. Look for damage. Also the miles on the ticker help me to give cause, if it is very high miles then the motor counts would be my focus.
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More info is needed. Has it been upgraded to fuel injection? What is idle set to in park? Is there an aftermarket cam installed?
If it was originally in a manual transmission car and your car is automatic the idle will need to be adjusted higher. If it has been upgraded to fuel injection (throttle body injection) I would start by checking the idle air control.
If we have more info about the engine we can help out more.
<p><b><u><span>Excessive fuel consumption and 'lumpy'
idling engine</span></u></b><br />
<p><b><span>Possible faults:-</span></b><br />
<p><b><u><br /></u></b><br />
<p><b><u><span>Coolant sensor </span></u></b><span><span> </span>- engine is signaled as being 'cold' all the
time, not just at start up, causing ECU to set longer injection cycle </span><br />
<p><span><span>ø<span> </span></span></span><span>Low coolant level can prevent sensor being able to detect coolant
temperature</span><br />
<p><span><span>ø<span> </span></span></span><span>Faulty 'open' thermostat allows coolant to circulate without regulation
and perhaps prevents the engine from achieving normal running temperatures.</span><br />
<p><span> </span><br />
<p><b><u><span>FPR</span></u></b><span> - broken diaphragm allows fuel to enter
the vacuum line and then into the inlet manifold. Additional source of fuel
makes the fuel air mix richer causing a faster and lumpy idle.</span><br />
<p><span> </span><br />
<p><b><u><span>Vacuum leak </span></u></b><span>- 'high oxygen' signal
from O2 sensor causes ECU to set longer injection cycle.</span><br />
<p><span> </span><br />
<p><b><u><span>O2 sensor</span></u></b><span> - 'high oxygen' sensor error
causes ECU to set longer fuel injection cycle</span><br />
<p><span> </span><br />
<p><b><u><span>MAF</span></u></b><span> - 'over reads' in error the amount of air
entering causing ECU to set longer fuel injection cycle </span><br />
<p><span> </span><br />
<p><b><u><span>IAT</span></u></b><span> - 'under reads' in error the temperature
of incoming air causing ECU to set longer fuel injection cycle</span><br />
<p><span> </span><br />
The power stroke engine has several things that will cause this problem #1 crank shaft sensor AKA cam shaft sensor on crank shaft located on passenger side of engine near crank shaft pulley # 2 IPC sensor Injection pressure control if has oil in sensor replace it & wiring pigtail .#3 high pressure oil pump not up to par. #4 injection pressure regulator solenoid they get sticky. with a good scanner that has FORD enhanced software you can check all of these without leaving the drivers seat and perform running tests on injectors and test the ficm module interface with the pcm. Fuel Injection Control Module & Power Control Module.
There’s probably a misfire in the cylinders. Have the computer scanned for error codes. You may need a new mass air flow sensor, oxygen sensors, spark plugs and ignition coils. The smell is most likely burning fuel as the car tries to inject more fuel to compensate for the misfire.
Hello, first is it carburetor or fuel injected engine? When was the last time it
was tuned up?
If carbureted engine then the carburetor will need to be rebuilt or replaced
with a rebuilt carb.
If fuel injected engine. low fuel pressure, faulty fuel injectors, new air
cleaner, throttle position sensor might need to be replaced, air flow sensor
could be faulty, broken vacuum hoses, plug fuel filter, faulty fuel pump, new
spark plugs, etc. All of these things need to be checked out.
You are probably not getting very good fuel mileage. Couple of things will be
needed. rebuild carburetor, new filters, and a tune up. GB...stewbison
Check ALL vacuum hoses as your truck is getting older and rubber components may be breaking down.ALL sensors need good connections,electrical and where needed,vacuum to send correct data to the computer.
Has the throttle body been cleaned lately?
Don't overlook regular maintenance,plugs,wires etc.
You don't need to change the spark plugs since it has only 31.5 K. The plugs should last 60K.
There is a an adjustment at the gas cable end at engine to increase the idle a little bit. You can increase rpm at idle to 600 RPM. Since your RPM at idle is low that why it is shaking at idle, red lights.
Let me know it it is shaking at high speed ( 2500 RPM)
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