Question about 1994 Ducati 916

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Fuel delivery troubleshooting

I found spark at both plugs..... the lines in the tank and elsewhere do not appear to be pinched.... putting the tank back on...I don't know which lines go to which connectors on the tank.....one hose has an M on it

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The other does not.... any suggestions?On the hoses black is M and white is R right? The black goes on the tank to the forward one and the white to the rear one. On the tank, black is 'out' white is 'in'.,,,

Posted on Nov 10, 2008

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Can't seem to get fuel delivery from fuel tank to inlet valve


Hi, Richard always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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1 Answer

Engine valve timing


This is a simple engine to work on. Check for compression in the dead cylinder. If low or none, you found your problem....likely burnt exhaust valve.
If compression good, check injector for fuel spay or fuel delivery head for fuel delivery. With engine idling, crack each line nut at the fuel distributor and see if any fuel squirts out.

If so, check spark delivery by pulling lead to dead cylinder and install used/spare spark plug into plug lead. lay this against engine and run engine watching for spark at plug tip. Do not touch the plug or wire while engine running.

If no spark, check distributor cap for cracks inside. The electronics are primative on these so the above should get you close to the reason cylinder is not firing.

Apr 06, 2014 | 1985 Volkswagen Golf

1 Answer

I have spark just no fuel on my 93' rt 180


Hi, Anonymous always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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2 Answers

Will not start.


Check the chainsaws compression by putting your hand over the exhaust while slowly pulling on the string you should feel small bursts of air and feel resistance on the chain if not the cylinder most likely has lost compression and needs new piston rings.
Also, check that the spark plug is firing either with a spark plug tool (sold at many hardware stores or places like harbor freight). Or check it by removing it, connect it to the plug wire and touching the tip of the plug to a ground (the Finns on the cylinder or anything metal on the saw). Make sure you see a spark in between the two electrodes on the plug (do so in a dimly lit area as it can be hard to see). If there is no spark check the flywheel and magneto for any dirt or other material and clean it with a wire brush if there is no spark after cleaning the magneto, plug, and setting the plug you will need a new magneto.. Also make sure to check for dirt and carbon build up on the plug and use a gap tool and make sure the plug is set to the specs. on the manual (gap tool can be found at any hardware store) If you have cleaned the plug, properly set the gap, tested the spark, and have compression the problem is most likely a fuel delivery or fuel air mixture problem.
Make sure that the air filter is clean and free of any fuel/oil, moister, and dirt a dirty filter will foul operation.
Check the fuel tank for build up along with the fuel line and filter/strainer in the the tank if there is one. If you find alt of gum or particulates in the tank or line/filter clean them out with carburetter cleaner. You can also use starter fluid (sold at any hardware store) to clean the tank and lines and use it along with a clean tank/lines/carburetor. check the carburetor for build up by removing the bottom screw on it to inspect the bowl and carb float for residue. If you find thatr the carb bowl and float has particulates and other build up clean it with carb cleaner.
Also check the idle and running screws on the carb for proper adjustment the user manual will have the information to do so.

Jan 24, 2011 | McCulloch Garden

1 Answer

How to repair leaking fuel lines under the tank


Okay, prepare to get some gas on you. You need to drain the gas
You'll need:

1 pair hemostats or hose pincher
1 pair of wire cutters
1 screwdriver phillips or flat head
1 nut driver 1/4 inch or 5/16 inch
New fuel line. (cut 1 two inch piece and put the bolt in one end making a plug) = 2 inch plug
Hose clamps.
1 Bolt that will fit inside fuel line.(make line plug)

Pinch either side of the fuel line with hemostats. Cut the factory clamp off and pull the hose off. Put the 2 inch plug on the tank,and that will stop the gas from coming out. put a hose clamp on it if you want so it don't leak.
Now put a gas can under the pinched line and unpinch it and let the gas drain out of that tank.
When done draining , cut that hose off the tank and put it on the other side where that plug is. Remove the plug and put that line on and let that tank drain.
Once the tanks are drained., Just cut the hose to length and replace, using new hose clamps and new fuel line.
If your quick enough you can swap the hoses out without draining the tank.
You will get gas on you no matter what.

Dec 02, 2010 | 2000 Harley Davidson FLHTCUI Electra Glide...

1 Answer

1989 toyota land cruiser.driving on highway engine died.turns over good but wont start.has a full tank of gas.put in new battery and altenator a few weeks ago,been running fine.checked the fuses and found...


Hi.

Re:new battery and altenator
If engine turns over battery and altenator are OK.

Re:checked the fuses and found a few were blown.
Effectively those may be symptoms of a wiring problem. If a job had been carried recently, undoing and re-connecting the wires to access the part(eg. alternator) may have contributed to the problem.

Check all fuses, with attention to fuel pump fuse. Check the connectors to fuel pump, eventually read volts at pump and nsure that fuel is circulating
Check air intake and connectors to air intake sensors (MAF sensor), check connection to crank sensor and O2 sensors.

The blown fuses may also have been incidental. If you did not find anything, troubleshooting must proceed as usual, checking distribution, fuel pressure, and then factors that can affect the ignition.

Remember that after a prolonged and failed attempt to crank the vehicle, the cylinders will be flooded and the car will no start (wet plugs- no spark).

Check if there is spark on all cylinders. This can be done removing one by one the spark plugs wires and putting them near to the engine block while someone else try cranking. You will see the spark.
If there is no spark, then you have a coil/distribution problem. test coil by reading volts in and impedance (coil must not be open). I think this engine is not distributorless. Check distributor cap and wires. If you have disconnected spark plug wires after the problem, also ensure that wires are connected in right order.

Once you are sure that there is spark, check fuel delivery and engine control. This part will take longer.

I uploaded here engine control diagrams and other documents that may help.

Regards.

Sep 08, 2010 | 1989 Toyota Land Cruiser

1 Answer

Rebilted carb.replaced fuel line start if u put gas in carb will not run old saw but comp. is good. rebilt befor. with no problem 330 homelight.one line go to the fuel tank where do the other line go to...


Your fuel line may be pinched off where is routes to the carb.
Check and make sure that the vent in the fuel cap is clear so you are getting air in the tank

Spark to the plug?
Second line to body of saw is the vacuum from the lower 1/2 of cylinder

Mar 08, 2010 | Homelite ZR10926 16" Chain Saw

2 Answers

Wont idle


If you did nothing to the carburetor adjustments, are using a fresh (1.5 months or less) fuel mix with the same oil/fuel ratio, are operating at the same elevation, and the air filter is clean, there is a reason your saw is acting up.
Most often it is a fuel delivery problem. Check the fuel filter on the free end of a hose in fuel tank (manufacturer recommends an annual replacement). Check all fuel delivery lines especially at fittings and bends for cracks and holes. If those are good then the likely cause is internal parts of the carburetor are dirty or have failed. HTH

Lou

Oct 31, 2009 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

Chain saw (skill 1631) no start ,Have spark,Starts for few seconds when put one spoon of gas in spark plug


There may be a fuel delivery problem. Check the fuel filter on the free end of a hose in fuel tank (manufacturer recommends an annual replacement). Check all fuel delivery lines especially at fittings and bends for cracks and holes. If those are good then the likely cause is internal parts of the carburetor are dirty or have failed. HTH
Lou

Oct 16, 2009 | Garden

2 Answers

I have hyundai accent 2003. While driving the engine died. Checked fuses,ignition,fuel pump(don't know if the pressure is right),starter is starting ok.


#1. Scan for trouble codes. If any, record them and let us know which ones they are.
#2. Connect a fuel gauge to the fuel delivery line at the engine... try to start the engine while monitoring fuel pressure... if there is fuel pressure (approx 35 to 50 lbs), the problem is elsewhere.
If no fuel pressure, check fuel pump relay, fuse, wiring to fuel pump connector (power & ground - use 12volt test light). If power & ground are present, problem is the pump (fuel filter is attached to the fuel pump inside the tank).
#3. Check injectors for injector pulse, check ignition coils for spark to spark plugs.

Sep 06, 2009 | 2003 Hyundai Accent

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