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Vespa et4 125 fuel starvation? Cuts out on me... Help?

Check the main jet is set up correctly. Make sure there is plenty of fuel in the float chamber, if not check the fuel line again. There should be a good amount of petrol flowing from the carb feed pipe with the fuel tap on. It should fill a pint container fairly quickly.

Apr 24, 2017 | Vespa Motorcycles

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Fuel starvation. If i am idling the car will just die. If I am driving it jolts like running out of gas. mechanics said fuel starvation If i take my foot off gas and put it back on, car is fine.

Well, fine for how long? Until you come back to an idle and it starts all over? Is it constant with the jolting- that probably is fuel starvation- but interesting that it sounds like something resets when you take your foot off and back on.
I can tell you right now that to start, you need to have the fuel pressure tested. The fuel pump has to maintain high pressure in the system at the engine for the fuel injection system to work correctly. Too low of a pressure, because of a weak or worn out pump, will cause fuel starvation, just as you described. This is a simple test and only takes a few minutes, so it should not be expensive to have it done, if you don't have access to a fuel pressure gauge tester.
If the fuel pressure is correct, it could be an injector problem, either mechanically or electrically related, but more likely and less expensive to test, is a problem occurring at the throttle body assembly. There are a couple of computer sensors there that should be checked- the Throttle Position Sensor has a lot to do with smooth acceleration and steady off-idle like high speed driving. This sensor especially needs to be checked. And there is an idle control motor or valve that the computer controls for smooth idle- the IAC (idle air control) system, just a small electrical piece mounted on the throttle body.
I would bet you have a fuel pressure problem, but sometimes your symptoms can be caused by a problem at the throttle body assembly-they all contribute to fuel starvation, or more precise they affect the fuel/air ratio. When that ratio is too far out of whack, it just kills engine performance .

Jun 01, 2016 | Cars & Trucks

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Engine codes

Check for starvation of fuel by installing the good ol' fuel pressure gauge near the carburetor inlet fuel line. I believe the fuel pressure should be around 6 to 8 p.s.i.

Check the Haynes repair for the carburetor rebuild kit installation if necessary for the Toyota 4runner.


Feb 20, 2014 | Vehicle Parts & Accessories

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Wont go over 3000 rpm

Any codes? Blocked fuel filter and/or damaged fuel lines?

Sep 13, 2013 | Toyota Land Cruiser Cars & Trucks

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Hayter 41 fuel starvation

Take your fuel cap apart. Or try start with cap off, if it starts it the cap.

May 04, 2012 | Briggs & Stratton Briggs Stratton...

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1992, ZZR 600 stops after 10 km running. Possible solutions??

I would check the fuel tank air inlet pipe. If blocked it will create a vacuum and stop the flow of fuel.
Did the bike cough and run rough, like fuel starvation before it conked out? If so that is a clue to fuel starvation.

Mar 31, 2011 | 1992 kawasaki ZZR 600

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Car loses power above 60mph. it's a 1997 British Ford Fiesta LX, but it's not on the model list provided

Replace the fuel filter - but check the air filter isnt dirty and clogged up first... can only be fuel starvation or air starvation -

Jan 24, 2010 | 1997 Ford Escort

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