Im working on this 2009 Honda BF115A for a friend of a friend. Motor came to me with head removed, talked to the owner and he was having surging/idle issues...sounded like a fuel issue. Head had some corrosion in the exhaust side so I replaced the head and all head parts. Everything is right in that department and to specs. Compression is about 205 even, but the fuel issue symptoms are still there. Imagine that.
So, at idle it's a little rough once its warm and IAC shuts down. You eeeeaaassseee on the gas, it'll go. Anything faster than that it dies. Only does this between dead idle and about 1,100 RPM's. Runs great above 1,100.
Starting at the tank, found a leak at the pick up...replaced it. Replaced fuel lines from tank, replaced water fuel seperator. Installed new primer bulb. Replaced VST outlet filter, cleaned screen on fuel pump. Replaced 10 micron entry filter. VST is clean. Lines are not showing signs of leaking on engine, no links. Connections are tight. Fuel pump test showed 2.7# out the low pressure pump. Replaced it, now showing about 3.4 at idle. Some improvement there.
Pulled fuel injectors, sprayed cleaner through them, and it seemed to improve some, but gradually went back to the way it was. Today I pulled #1 injector wire; shut off. Pull 2 and 3, barely any change. Pull 4, it changes a lot or shuts off.
Where do I go from here? Should I replace injectors? Cleaning them held open w 12V only does so much. Or has someone dealt with this before and can point me in the right direction? 1 and 4 ignition coil are the same right, as well as 2 and 3? Should I be looking there? Any help would be GREATLY appreciated!!!!!
So, at idle it's a little rough once its warm and IAC shuts down. You eeeeaaassseee on the gas, it'll go. Anything faster than that it dies. Only does this between dead idle and about 1,100 RPM's. Runs great above 1,100.
Starting at the tank, found a leak at the pick up...replaced it. Replaced fuel lines from tank, replaced water fuel seperator. Installed new primer bulb. Replaced VST outlet filter, cleaned screen on fuel pump. Replaced 10 micron entry filter. VST is clean. Lines are not showing signs of leaking on engine, no links. Connections are tight. Fuel pump test showed 2.7# out the low pressure pump. Replaced it, now showing about 3.4 at idle. Some improvement there.
Pulled fuel injectors, sprayed cleaner through them, and it seemed to improve some, but gradually went back to the way it was. Today I pulled #1 injector wire; shut off. Pull 2 and 3, barely any change. Pull 4, it changes a lot or shuts off.
Where do I go from here? Should I replace injectors? Cleaning them held open w 12V only does so much. Or has someone dealt with this before and can point me in the right direction? 1 and 4 ignition coil are the same right, as well as 2 and 3? Should I be looking there? Any help would be GREATLY appreciated!!!!!