Also may try to shoot a temp gun on the exhaust manifold tubes while it's misfiring if possible and compare readings of all 4 cylinders to find the culprit.
Need a little help with my bike.
- Thread starter HelluvaEngineer
- Start date
It makes perfect sense that the primary injectors are the biggest pain to get too...such is life.
Sounds like bad coil , or ecu
I'm going to check the coils when I get home by moving them around. I also found all the parts I need to rebuild the fuel injectors and since it is 10 years old and already mostly disassembled I'll go ahead and do that.
I can't see it being a air leak since that would cause it to lean out more @ high rpm then low rpms and the problem is only at the low.
New injectors would be $115 a peice and a new ECU is $800. Hopefully its just a coil which is a $50 piece. It'll only cost $80 to replace the seals on all 8 injectors. I'll let y'all know how it goes.
I can't see it being a air leak since that would cause it to lean out more @ high rpm then low rpms and the problem is only at the low.
New injectors would be $115 a peice and a new ECU is $800. Hopefully its just a coil which is a $50 piece. It'll only cost $80 to replace the seals on all 8 injectors. I'll let y'all know how it goes.
Work ran late today/tonight I'll do some more troubleshooting tomorrow.
Has the bike sat for extended periods of time? Have you taken the fuel pump out and checked the fuel filter? It very well could be a semi-clogged injector.
You can check to see if there is an air leak around the throttle bodies by spraying some starting fluid. If the idle goes back to normal, there is a leak there.
It really does sound like some sort of a fuel issue. The charging system souldn't cause the bike to have a rough idle at low RPMs and smooth out in the higher RPM's.
You can check to see if there is an air leak around the throttle bodies by spraying some starting fluid. If the idle goes back to normal, there is a leak there.
It really does sound like some sort of a fuel issue. The charging system souldn't cause the bike to have a rough idle at low RPMs and smooth out in the higher RPM's.
Last edited:
Check the simple stuff first. Safety switches have a funny way of masquerading as running issues. Seen a side stand safety switch give a hesitation and stutter because it was failing and the vibes at a particular and lower rpm made the switch engage ever so slightly and it came out as a running issue of course. Check connectors and wiring.
After that I'd go to all secondary fuel injection. Honda did have a slight issue with their AIP sensors in the past so go through all of them and check with the dealer about service bulletins
After that I'd go to all secondary fuel injection. Honda did have a slight issue with their AIP sensors in the past so go through all of them and check with the dealer about service bulletins
just something to look at, but the petcock fuel filters and the inline fuel filter if you have one installed. Make sure they are clean.
AIT sensor, map or maf sensor. Check all vacume hoses, loose grounds. Does the air box have a flapper?
Most of the suggestions listed in here would be WOT (wide open throttle) problems.
