Go Bottom50 Hp 3 cyl diesel with 500 hrs popping
 | krb1945
Join Date: Oct 2013 Posts: 40 North FL & South GA 
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2023-09-04 201729
I've got a long 2360 3 cyl that has starting popping when unloaded and at higher rpm, 1500 and above. I changed all filters, and installed new long calibrated injectors, at least they said they were calibrated. No trash in the fuel filters etc, plenty fuel from pump etc. Seems to be only one cyl. Although this machine only has 500 hrs in 24 years it starts like new, except for that high rpm popping. I'm thinking one of the injectors wasn't calibrated correctly at the factory. Any ideas on this problem?
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| Caplight
Join Date: Oct 2003 Posts: 9 New Hampshire
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2024-03-04 201796
It sounds like you've already taken some important steps to address the issue with your Long 2360 tractor's popping sound at higher RPMs. Since you've changed the filters and installed new calibrated injectors, there are a few more things you can consider to troubleshoot and potentially resolve the problem:
Injector Timing: Even though the injectors are calibrated, it's possible that the injector timing is off for one or more cylinders. Incorrect injector timing can cause combustion issues, leading to popping sounds at higher RPMs. Ensure that the injectors are properly timed according to the manufacturer's specifications.
Compression Test: Perform a compression test on all cylinders to check for any variations in compression levels. Low compression in one cylinder could indicate issues such as worn piston rings, valves, or cylinder head gasket leaks, which can affect combustion and cause popping sounds.
Check for Air Leaks: Inspect the intake manifold and associated gaskets for any signs of air leaks. Air leaks can disrupt the air-fuel mixture and cause erratic combustion, resulting in popping sounds. Use a can of carburetor cleaner or a smoke machine to detect any leaks in the intake system.
Fuel System Pressure: Verify that the fuel system is maintaining adequate pressure at higher RPMs. Low fuel pressure can affect injector performance and combustion quality, leading to popping sounds. Check the fuel pressure regulator, fuel lines, and fuel pump for any issues.
Ignition System: Although your tractor likely has a diesel engine, ensuring that the ignition system components such as the spark plugs (if applicable), ignition coils, and distributor (if applicable) are in good condition can help rule out any potential issues with the ignition system.
Exhaust System: Inspect the exhaust system for any leaks or damage that could be contributing to the popping sounds. Exhaust leaks can create backpressure issues and affect engine performance.
Engine Timing: Verify that the engine timing is set correctly according to the manufacturer's specifications. Incorrect timing can cause combustion issues and result in popping sounds.
If you've checked all of the above and the problem persists, it may be beneficial to consult with a qualified mechanic or technician who has experience with Long tractors. They can perform a more in-depth diagnosis using specialized tools and equipment to pinpoint the exact cause of the popping sound at higher RPMs and recommend the necessary repairs. ....
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