Rhode Warrior
Supercharged
My 2005 Rocket was running perfectly all last year. Last month all of a sudden the bike starts to break up at low RPM's under load, like when taking off from a stop or giving it gas from low RPM's. It only does it after I ride the bike for about 20 minutes to a 1/2 hour and it does it consistently.
After it started doing it, I replaced both throttle position sensors. The bike had a bad secondary TPS complete with error message. I replaced that and while I was at it replaced the new style primary TPS. I did the voltage and stepper adjustments on the sensors and it was dead on. I did the adjust ISCV and reset adaption multiple times.
I have TuneECU and I went through all the tests, everything is fine.
Since then I have cleaned the crankcase sensor, (which was very clean anyways), synched the throttle bodies and they're all the same, and removed the secondary plates. I checked all the low voltage connections on the coils and crimped them a little tighter. I took a shot and replaced the stepper motor and it didn't help. I did the headlight relay upgrade as soon as I bought the bike. Could the ignition switch still be the cause?
It starts and runs perfectly, idles at 800 and feels really strong..............except for when I ride it for more than 20 minutes then it has the stumble off idle up to about 2,000 RPM's and a little bit of a rough idle. It's OK above 2,000.
I'm thinking it might be the MAP sensor? Maybe vacuum hoses. I'm racking my brain trying to figure what might change after it warms up. The spark plugs look good too.
My plan is to look at all the readings on TuneECU, especially MAP when it's cold and running right, then look at the readings after it starts to do it and see if I can find the culprit.
The bike has a cat delete, otherwise it's stock. It has fresh gas in it. Bike has only 3,300 miles on it.
Make sense?
After it started doing it, I replaced both throttle position sensors. The bike had a bad secondary TPS complete with error message. I replaced that and while I was at it replaced the new style primary TPS. I did the voltage and stepper adjustments on the sensors and it was dead on. I did the adjust ISCV and reset adaption multiple times.
I have TuneECU and I went through all the tests, everything is fine.
Since then I have cleaned the crankcase sensor, (which was very clean anyways), synched the throttle bodies and they're all the same, and removed the secondary plates. I checked all the low voltage connections on the coils and crimped them a little tighter. I took a shot and replaced the stepper motor and it didn't help. I did the headlight relay upgrade as soon as I bought the bike. Could the ignition switch still be the cause?
It starts and runs perfectly, idles at 800 and feels really strong..............except for when I ride it for more than 20 minutes then it has the stumble off idle up to about 2,000 RPM's and a little bit of a rough idle. It's OK above 2,000.
I'm thinking it might be the MAP sensor? Maybe vacuum hoses. I'm racking my brain trying to figure what might change after it warms up. The spark plugs look good too.
My plan is to look at all the readings on TuneECU, especially MAP when it's cold and running right, then look at the readings after it starts to do it and see if I can find the culprit.
The bike has a cat delete, otherwise it's stock. It has fresh gas in it. Bike has only 3,300 miles on it.
Make sense?