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How do I clear a clogged fuel line? - Cars & Trucks

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Air pressure

Posted on Apr 11, 2015


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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I changed the fuel pump to my car but still it can't start and the engine is 1zz

Assuming fuel pump was in gas tank unless older vehicle, in front of gas tank under the car will be a fuel filter...canister a miniature coke can...has one line coming from gas tank, one coming from front of filter to engine, will either have lines that thread into filter or plastic clips you remove and take lines off..take filter off and dump into a clear bottle, if gas is dirty or has trash you prob need to replace fuel fiter..also you should be able to blow through the filter without virtually any resistance..if its not similar to blowing through a straw..filter is clogged..also you can just take fuel line off in front of filter...have someone turn the key to on position...when you turn key to on not crank just on..fuel pump powers on for a couple seconds and if filter isn't clogged you should have fuel come out the front side of fuel filter

Sep 18, 2015 | Cars & Trucks

2 Answers

Fuel Spurting out fuel line, above my engine

What is the year make and model of your car?

Oct 10, 2017 | 1993 Nissan 300ZX

1 Answer

Ran out of gas now wont start

Bad, Bad! Now you have probably clogged the fuel tank fuel filter and the in line fuel filter under the car. You surely have to change the can-like filter under the car. Checking to see that gas is flowing to it and through it. If it is, the fuel line both to and from the tank is, fuel injectors...

Jan 14, 2013 | 2000 Dodge Caravan

1 Answer

My h23 dohc v-tec is surging could it be a clogged cadilletic converter

Very low possibility. More likely the fuel injector(s) are worn. They are good for only about 75,000 miles- their expected service life.

if they were recently replaced, check fuel pressure regulator- unplug the vacuum line, or put a gauge on the line and see if it has steady fuel pressure.

If it surges while driving- at highway speed, while throttle position sensor is a possibility- rule out the fuel system. If you have the MAPP sensor, make sure the atmospheric vent is clear, mason bees like these for nesting. If you ahve the Mass airflow sensor- back flush it with contact cleaner to clear the heater wire and the sensor.

A clogged catalytic converter would make acceleration slow, the engine would sound like it was straining, and top speed would be limited.

Feb 04, 2012 | 1998 Honda Civic

1 Answer


When older vehicles are driven to the point of running out of fuel, the deposits in the tank are sucked into the line and clog the filter and the line. On a 13 year old vehicle, I'd say you probably had this happen. You may be able to clear the debris by removing the gas cap and putting a small amount of compressed air backwards through the system by removing the line that feeds your fuel rail. put the air into the line slowly and have someone listen near the tank. After a while the debris will be cleared of your lines and backflushed through the filter. Gas should flow freely after that. Change your fuel filter asap though after it's running again. Or yes, it could be the pump.

Nov 14, 2010 | 1997 Jeep Grand Cherokee

1 Answer

My carburetor isn't getting any gas to it and i just replaced the mechanical fuel pump what other problems could there be and how do solve them

Fuel line between tank and pump could be blocked. Remove fuel cap and Disconnect fuel line from inlet side of pump and blow back. If line is clear you should hear bubbling from tank filler. It could be that you have picked up a batch of dirty fuel that has clogged the gauze input filter that is inside the fuel tank.

Aug 18, 2010 | Chevrolet Silverado Cars & Trucks

1 Answer

MY 1992 toyota celica acted like it was running out of gas and just quite and will not run agian. I have checked the fuel pump and the plugs are fireing. What else could be wrong?

could be alot of different things. try disconnecting the fuel line at the motor to see if you have fuel when the key is turned on. (put open end of line in a bottle preferrably clear to inspect for debris or water) If not replace fuel filter. could be a clogged catalytic converter, could be clogged injectors (if when you remove the fuel line at the motor there is fuel coming out when ignition is turned on) could be air filter is clogged. You can get rid of most of these without disconnecting anything by getting a can of choke and carb cleaner. Use it like you would starter fluid. (dont use starter fluid as it may lock up your motor) disconnect air filter and spray about a 2 second full spray into the air filter hose. have someone try to start the car. If it starts then you know its a fuel delivery problem and narrows it down for you.

Aug 03, 2010 | 1992 Toyota Celica

1 Answer

1996 Acura Integra-Sputtering engine at acceleration in low gears

Could be a few things. Start simply with the fuel system. Always think simple first. Water in the fuel line/gas tank. Add some fuel line drier/de-icer.
Did it work? Yes= done.
No= Check the spark plugs for oil, deposits, proper gap and general cleanliness.
Did it work? Yes= done.
No= check the injectors. Tthey may be clogged beyond what a fuel additive can disolve. If clogged, REPLACE. Do Not poke object into injector to clear and re-install ! You ruin the jetting doing this giving yourself another headache.

This really sounds like a water issue unless it's happening only under load, Then it's timing.

Mar 25, 2009 | 1996 Acura Integra GS-R

1 Answer

1996 Dodge Caravan with a 3.0L . Long cranking time before starti

You need to do a fuel pressure check.. You will need a special fuel gauge and the appropriate fittings and adapters are needed to properly test the fuel pressure.

1. Relieve the fuel pressure.
Remove the fuel pump relay form the Power Distribution Center (PDC) Start the engine and run until it stalls. attempt restating the engine until it will no longer run. Turn the ignition key off. Disconnect the cable from the negative battery terminal. Replace the fuel pump relay in the PDC. Any if you get any trouble codes at this time you will need to see a shop to have them cleared.

2. Disconnect the quick-connect fuel line fitting fuel gauge into the fuel line using the appropriate T-fitting and adapters.

3. Start the engine and check the pressure on the gauge, your reading should be 49 PSI with the pressure with the engine idling.

4. if the fuel pressure is not 49 PSI:
1) if fuel pressure is higher you could have a pinched of clogged fuel return hose of pipe. if the line is not obstructed check the fuel pressure regulator.
2) if fuel pressure is lower check the fuel filter, look for a pinched of clogged fuel hose between the tank and the fuel rail. check the pressure regulator for malfunctions. Look for leaks in the fuel line.

Hope this helps.

Jan 16, 2009 | 1995 Dodge Caravan

1 Answer

1983 toyota pickup 4x4 22re engine

Clogged fuel line... maybe fuel filter clogged. Air compressor can clear line. Blow out the line coming in to the carb from the tank.

Aug 03, 2008 | 1983 Toyota Pickup

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