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Motor idles but cuts out when throttle is increased or when load is placed on motor. Motor has new spark plug, coil and condenser.

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Hi and welcome to Fixya, I am Kelly.
Remove the float bowl... clean out the debris and make sure to use carb cleaner on the main fuel jet orifice. Also pull off the fuel supply hose from the fuel tank where it connects to the carb fuel manifold fitting. Fuel should flow rapidly though this hose. If not start searching for a fuel filter and inspect the fuel tank outlet port for debris.

This is a very generic response, If you want specific how to information I need your engine BRAND and model number in your next repsonse.

Thanks for choosing FixYa,

Posted on May 21, 2011


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I have a 2005 ford e-coline van when running and going over 25 mph it shuts off i have to turn key off and restart

this might be a worn throttle position sensor because if it runs at idle and then when you increase with gas peddle there could be a worn spot in the sensors contact also if this is a drive by wire throttle body(throttle motor with a plug on it and no lever for manual throttle increase this also could be bad you must have a check engine light on if not when you first turn the key for power///NOT CRANKING ///check to see if all dash warning lights come on in the self test of the system the bulb could be burned out for the check engine light if so go to auto zone or advance auto and they will scan your system for trouble codes to give you a better idea post back with results and progress and we will go further if needed you did not specify what E van 150-450 and motor size 4.6--5.4gas------6.0 diesel so I'm assuming that it's gas please be specific if you post back all of us here need this info for trying to help you remember your there in front of the vehicle we are not here is a couple of pics for you this is the throttle body motor and you would get a check engine light and a wrench sign on the dash warning lights
this is the throttle position sensor below check engine light will be on
26381095-lw30xb3gqn3gwqtvkpmbzy1k-1-2.jpg there is also the possibility of really warn spark plugs that are way out of gap and the engine can only run under light rpm load and when rpms increase the spark plug electrode gap is to far out and the heat from the plug firing inside the head is making expand even more and thus no spark plugs firing and no rpm increase and engine dies look at the plugs first and check the gap then go further as described above good luck Stephen


Dec 01, 2016 | Ford Econoline Cars & Trucks

1 Answer

Replaced f/p could it be mechanical fuel return valve in tank; motor revs up to4000 rpm then cuts

inspect TPS and idle control motor--good idea to clean the throttl body unit ------a scan w factory gear will show whats goin on in the system--a code reader at a partsplace wont--seek a private mechanic who has xperienc in data streams

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Why is my volvo losing power when accelerating

There are hundreds of reasons a car can lose power but the first step should always be to remove the throttle body and give it a thorough cleaning with a quality throttle body cleaner (i.e. CRC).

Throttle bodies should be regularly cleaned, but seldom are and the deposits can prevent the cars' MAF sensors from getting an accurate read of how much air the motor is getting. It can make an 8 cylinder motor feel like a V6 or worse in more severe cases.

You can probably perform this service without a mechanic. I'd recommend searching on Volvo forums for specific how to's.

Aug 25, 2014 | Cars & Trucks

1 Answer

My John Deer Sabre 1646 motor cuts off when throttle is applied or under load.

The symptoms you describe usually means a dirty carburetor. Change the gas filter. Spray some carburetor down the throat of the carburetor after you remove the air cleaner. Place about 1/3 can of fuel system cleaner in the gas tank and let the mower idle. You may also want change the spark plugs.

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1 Answer

Poor idling

Coils,fuel filter,dirty throttle body.

May 11, 2013 | Cars & Trucks

1 Answer

Chainsaw starts normally idles well increase speed and cut a log then decrease speed and the motor stops

Have you tried changing the gas you are using? Sometimes with the addition of ethanol, water condensation is attracted and builds up in the system, creating a fuel mix that affects performance. Also, make sure your settings for High speed throttle are correct. You may need to make a small adjustment on the screw marked H for running high throttle.

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Hello, i have a bmw 318ci convertible, ive spent about 1500 on gettin stuff done an its still not fixed no 1 can find the problem can any1 help, ive had loads of computers on it an it keeps comin up about...

When you say coming up air flow meter what is the code (P0100?). Check that the MAF is clean. Do not touch it but merely spray it with (residue free) electrical cleaner and allow to air dry. Check the MAF socket and pins at the connection are clean. Make sure the MAF connector wiring back to the ECU is in no way broken or abraded Make sure that there is no air leak after the MAF sensor. check every joint entering the air ducting prior to the throttle. I recently had a case where the jubilee clip holding the air duct to the throttle had been fitted too tightly and had split the duct rim along the bottom. It was only possible to see it when the duct union was disconnected. Now check the interior of the throttle body. Clean it thoroughly and rotate the throttle plate with your fingers and make sure it is clean behind. Check every vacuum line connecting with the inlet manifold plenum for leaks. One quick way is to remove each in turn and stopper off the now open inlet connection with you finger. Have the car at idle and disconnect the fuel pressure regulator vacuum line. If the FPR is OK the engine should for a second or two increase in speed and then return to a lumpy idle - this shows that the release of vacuum on the FPR diaphragm allowed a short burst of increased fuel pressure that then resulted in a shortened injection cycle when the Oxygen sensors detected the rich mixture in the exhaust. Now check the injector sockets and the union of the inlet manifold with the engine. A quick way is to spray electrical cleaner in suspect areas and monitor engine response in the next couple of seconds. If the engine momentarily speeds up then the cleaner was sucked into the mix via the point of the leak. Assuming everything has checked out so far let us look at electrics, coils first . If memeory serves the 318 has 2 twin coils so that plugs 1 and 4 share a coil and plugs 2 and 3 share the other. Remove spark plugs and check and compare spark quality on each. Replace plugs and remove leads 1 and 4 from the shared coil. Turn engine over and monitor the spark from the coil terminals. If spark emanates from both terminals then the crank sensor is likely to be OK. Remove the cam sensor socket connector it should be clean and free of oil on the inside. Remove the sensor and check it carefully for signs of cracking or swelling. Cam sensors can fail eventually due to the thermal cycling of the engine. Just rereading your explanation I also wonder about the idle air control motor/valve, that and the throttle position sensor. Worth looking at if the above fails to resolve things.

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1 Answer

41 9n ford motor not powering up enough

This one sounds like it may still be out of time.

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1 Answer

Our 40 Merc Won't open all the way up under load.

A couple of possibilities are the spark advance and the fuel line. Carburetors can do it as well as a clogged screen on the fuel pump. So can a bad coil.

Look for electrical parts under the flywheel area of the motor. When you move the throttle there should be movement of the stator to advance the spark. Check for binding wires or disconnected linkage.
See if the spark is jumping strong to the plugs for coil strength or have it tested.
Check fuel pump screen and diaphram.
Before messing with carbs-disconnect cables for throttle on boat. Work by hand directly at motor. You may have cables restricting movement.
Thats about all I can think of. Let us know of outcome.

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Honda Misses.

Pin point the dead hole and check that injector.

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