Hi,

I am helping my buddy with his '01 CBR600F4i. It suddenly started sputtering and stalled while riding. We got it to start but it barely idled and the exhaust smoke was black as it was running insanely rich. Bike kept dying after about 300m of riding. We checked the fault codes and the relevant ones that came up were code 1 (MAP sensor Issue), code 8 (Throttle Position Sensor Issue), Code 18 (Cam pulse Gen), Code 19 (Ignition pulse gen).

My thinking is that as there was no backfiring the ignition pulse gen is likely not the key issue here. Typically in my experience with cars the MAP sensor shouldn't get it to that point, it will just be a tad rich and worse on gas but run fine, but maybe for this bike it's more problematic, what do you think?

Due to that I think the cam pulse gen which tells the ECM to fire injectors would be the problem, that or the TPS as the bike would die past a certain rpm and it had to be kept low in the range. Has anyone experienced this, any opinions from bike mechanics?

Just in case I have read the codes wrong, here is the flashes I am given in diagnostic mode (I will use commas to denote long pauses):
Turn on ignition: 1 short blink, 1 short blink, 7 short blinks, 8 short blinks, 9 short blinks, 1 long 8 short, 1 long 9 short

Edit: We cleared the codes and now its just one short blink (MAP sensor error), I think bad MAP could've caused the plugs to be fouled, any thoughts here?

 

Kinda sounds like the fuel pressure regulator may be bad. What have you checked so far? Is the MAP sensor and vacuum lines all connected?

 

So, we cleared all the codes and now code 1 (MAP) is the only one. MAP is connected and I think the vacuum lines are too, but I wasn't the one who checked. My buddy is in the process of checking his plugs as my running theory at the moment is faulty MAP fouled the plugs. How would I check the fuel pressure Regulator on this bike?

 

See if there is fuel in the fpr vacuum line when the pump primes.

 

Where is that located? Most of my experience is cars and boats and most of what I work on is carbed. Do I want fuel in that or no?

 

It's the round thing on the end of the fuel rail that has the vacuum line on it. There should be no fuel in the vacuum side of the diaphragm and it should hold a vacuum.