Can’t figure this out.
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Junior Member
Joined: Mar 2023
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Can’t figure this out.
I have an issue. Sorry this is so long just want to make sure I cover everything.Just got bike back after being in shop from giving f1 light blinking twice. Sensor wasn’t connected apparently. Bike has been bogging down slightly so changed spark plugs yesterday the f1 light started up again. So when it blinks it doesn’t run right obviously so went for a ride today and was idling bad so I tried adjusting idle cable/screw and it snapped. Bike still ran but wanted to fix the problem so I went back under air box too adjust cable until new one comes in. Noticed map sensor wasn’t good so went and bought map sensor cleaner cleaned it hooked tank back up and now won’t even fire up. Please help
Senior Member
Joined: May 2011
Posts: 1,988
Likes: 439
From: Mesa, AZ
No such thing as MAP sensor cleaner. There's MAF sensor cleaner to remove oil build-up from hot-wire of MAF sensors. You destroyed MAP sensor by spraying MAF sensor cleaner in it.
1. Buy new OEM factory MAP sensor from authorised Honda dealer. NO aftermarket or 3rd-party parts from shady operators.
2. Measure 5v reference voltage line at MAP sensor connector. volts = ??
3. Measure resistance of MAP sensor ground-wire to chassis-ground, ohms = ???
4. Measure MAP sensor output at idle at sensor itself, volts = ??
5. Measure MAP sensor output at 3000rpm at sensor itself, volts = ???
6. Measure MAP sensor output at idle at ECU connector, volts = ??
7. Measure MAP sensor output at 3000rpm at ECU connector, volts = ???
One of these numbers is most likely incorrect. Which is why ECU is throwing code and why bike runs poorly. Most of time, it's just broken wire or corroded connector terminals. The numbers you measured will tell where problem is and what to repair.
1. Buy new OEM factory MAP sensor from authorised Honda dealer. NO aftermarket or 3rd-party parts from shady operators.
2. Measure 5v reference voltage line at MAP sensor connector. volts = ??
3. Measure resistance of MAP sensor ground-wire to chassis-ground, ohms = ???
4. Measure MAP sensor output at idle at sensor itself, volts = ??
5. Measure MAP sensor output at 3000rpm at sensor itself, volts = ???
6. Measure MAP sensor output at idle at ECU connector, volts = ??
7. Measure MAP sensor output at 3000rpm at ECU connector, volts = ???
One of these numbers is most likely incorrect. Which is why ECU is throwing code and why bike runs poorly. Most of time, it's just broken wire or corroded connector terminals. The numbers you measured will tell where problem is and what to repair.
Senior Member
Joined: May 2011
Posts: 1,988
Likes: 439
From: Mesa, AZ
Again, no such thing as MAP sensor cleaner because it never needs cleaning. There is zero flow through sensor, it's a dead-end path.
Do above tests with your existing sensor. Numbers will say if sensor is good or bad. Or
if there's problem with wiring & connectors.
Do above tests with your existing sensor. Numbers will say if sensor is good or bad. Or
if there's problem with wiring & connectors.
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