While out driving the utv(work machine) which has always had 22-25 mph speed capability something happened....Going along and cart instantly lost power and will not go any faster than 12-14mph now. UTV always run on flat ground, gravel and asphalt paved roads. Kubota D902 engine
Removed fuel tank and cleaned(there was actually rocks in it)
Removed fuel hose and fitting out of tank and removed rocks out fitting.
Replaced fuel filter
Replaced one fuel injector
Replaced air filters
Removed muffler to check for plugged spark arrester(none found) but ran/drove with muffler removed with no change in engine performance
After replacing the injector I am still not getting fuel to all the injectors as I believe it should be...One definitely is working correctly and will change how the engine runs when you crack the injector...The other two not so much. Bypassed the LP mechanical pump before the injector pump with an electric pump to test(tank to electric pump to injector pump). Same running condition. I'm beginning to think I didn't have a injector problem to start with and may actually a injection pump issue. Engine doesn't appear to be running up to max rpm's. Temp gun on exhaust of each cylinder only has good heat on the one working cylinder. Cart does run and has zero blowby that I can see when oil filler cap is removed. Leading me to believe the cylinders are ok and I have a fuel delivery issue.
Any suggestions...I don't want to throw alot of $$$$ at this machine changing parts that may not be needed. We need this machine at work but company not willing to buy us a new one at this time...
Todd
Removed fuel tank and cleaned(there was actually rocks in it)
Removed fuel hose and fitting out of tank and removed rocks out fitting.
Replaced fuel filter
Replaced one fuel injector
Replaced air filters
Removed muffler to check for plugged spark arrester(none found) but ran/drove with muffler removed with no change in engine performance
After replacing the injector I am still not getting fuel to all the injectors as I believe it should be...One definitely is working correctly and will change how the engine runs when you crack the injector...The other two not so much. Bypassed the LP mechanical pump before the injector pump with an electric pump to test(tank to electric pump to injector pump). Same running condition. I'm beginning to think I didn't have a injector problem to start with and may actually a injection pump issue. Engine doesn't appear to be running up to max rpm's. Temp gun on exhaust of each cylinder only has good heat on the one working cylinder. Cart does run and has zero blowby that I can see when oil filler cap is removed. Leading me to believe the cylinders are ok and I have a fuel delivery issue.
Any suggestions...I don't want to throw alot of $$$$ at this machine changing parts that may not be needed. We need this machine at work but company not willing to buy us a new one at this time...
Todd