AMBAC Auto Part Advice From Eau Claire Diesel

Discover comprehensive solutions for various AMBAC injection pump issues with help from the experts at Eau Claire Diesel. Our professionals offer a wide range of high-quality assistance to help ensure your vehicle runs smoothly and efficiently. Check out some of the specific issues and troubleshooting solutions below that you may need to reference to help with your AMBAC injection pump, and feel free to give us a call to learn more about diesel injector repair in Eau Claire, WI.

Starts Hard

Verify the air cleaner is clean; just because it looks clean doesn't mean it flows the correct amount of air. If in doubt, replace it. Blowing out air filters does not work because the element usually gets more packed with debris than what you get out.

Verify the cranking speed is sufficient. If proper cranking speed is not achieved, then the injection pump will not supply adequate fuel to start.

Start by cleaning and charging the battery/s; if the battery is good, check the starter voltage drop. If this is good, replace the starter. We can supply most machines with an OSGR (offset gear reduction starter) to increase cranking speed and less battery draw.

Verify the fuel is fresh and the supply is good, check the lift pump if it has one, and check for fuel suction leaks. Install a clear fuel line from the fuel filter to the inlet on the injection pump. Monitor it for air bubbles, and if bubbles are present, you have a suction or vacuum leak in the supply hose. Keep moving the clear hose closer to the tank until the problem area is found and no air bubbles are present.

Verify and/or change the fuel filters. Do not assume because you just put a new filter on recently that it is good. If you have fuel contamination issues, the filter will be plugged up and need to be replaced. The tank should be cleaned or replaced, as well as all the supply lines. Supply issues can be found with the above testing procedure.

If all of the above checks out, verify that your compression is good. Good compression range will vary between engines, but you typically want to see 400 pounds of compression and above for a well-running diesel engine. See the manual for your engine for its suggested rebuild tolerances.

Starts Hard Hot

See the above "starts hard" information, and if everything checks out, then the injection pump's pumping head may be weak. When fuel is hot, it gets thin. When this happens, worn pumping heads leak off pressure more easily and do not supply the injector the full amount of pressure until engine RPM is sufficient for the pumping head to have enough RPM to make the pressure the injectors require, and then it will run.

Injectors Rebuilt and Now Starts Hard

This may be the same issue as above's "starts hard hot" troubleshooting. The pumping head in the tractor may be getting weak and not able to supply enough injection pressure to fire reset or rebuilt injectors. Come to us for diesel injector repair in Eau Claire, WI.

Low Power

Verify the fuel is fresh and the supply is good, check the lift pump if it has one, and check for fuel suction leaks. Install a clear fuel line from the fuel filter to the inlet on the injection pump and monitor it for air bubbles. If bubbles are present, you have a suction or vacuum leak in the supply hose. Keep moving the clear hose closer to the tank until the problem area is found and no air bubbles are present.

Verify and/or change the fuel filters. Do not assume because you just put a new filter on recently that it is good. If you have fuel contamination issues, the filter will be plugged up and need to be replaced. The tank should be cleaned or replaced, as well as all the supply lines. Supply issues can be found with the above testing procedure.

If all of the above checks out, verify that your compression is good. Good compression range will vary between engines, but you typically want to see 400 pounds of compression and above for a well-running diesel engine. See the manual for your engine for its suggested rebuild tolerances.

White Smoke

Smoke that is white and burns your eyes is usually a sign of fuel supply and/or early injection timing or restricted air flow and/or low compression. Verify the air filter is new. Try advancing the pump on high-hour machines. If the problem doesn't change, then verify supply and fuel quality. If that is good, test compression, then if that is good, check if the injection pump head is weak.

Black Smoke

Black smoke may occur if the air filter is pluggled, the exhaust is plugged, the turbo is not sufficient for the amount of fuel, and/or the fuel pump fuel setting is set too high for the engine. Properly set the pump and turbo size, and there will be little to no black smoke under the full load.

Contact Us

Get in touch with Eau Claire Diesel today to find the perfect solution for your vehicle's AMBAC injection pump. Our knowledgeable team is ready to assist you with any questions or concerns you may have. Let us help you keep your vehicle running at its best.

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