919 stalls with 2 gallons left while braking to a stop - Wrist Twisters
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post #1 of 7 Old 08-13-2018, 04:37 PM Thread Starter
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919 stalls with 2 gallons left while braking to a stop

I'm a new owner of a 2002 cb900f/919. I was wondering what other symptoms a bad fuel pressure regulator might have besides leaking into the vacuum hose. (Mine doesn't) when I get just below 3 gallons (2 left) the bike will stall when braking to a stop. I have read the posts about this,but no one had a answer. The bike runs perfectly until it has 2 gallons left, then stalls under braking, but starts right up and drives fine until the next stop...I have pulled the sending unit, and there was no fuel restrictions. Would the fpr cause this even though it's not leaking? The bike sat in storage for along while. I got it with 2300 miles on it. Tank is not rusted and the fuel filters are clean.
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post #2 of 7 Old 08-13-2018, 04:48 PM Thread Starter
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I'm wondering if the fuel pressure is low then the brake light might be lowering the voltage a little bit and then he fuel pump pressure gets lower and then it kills...then when I restart it and take off it's fine. Would a malfunctioning fpr cause low fuel pressure even if it's not leaking?

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post #3 of 7 Old 08-14-2018, 09:22 AM
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Would an electrical load from any other source imitate the same behavior? High beam, etc? If not, it seems you might have other issues. With that age of bike though, it's always a good idea to just replace the FPR anwyay, as they tend to go bad over time.

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post #4 of 7 Old 08-15-2018, 05:46 AM Thread Starter
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I have a FPR ordered......should be here by Friday.

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post #5 of 7 Old 08-18-2018, 09:31 PM Thread Starter
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Fixed the problem....the aftermarket fuel pump needed to be lower in the tank....I am going to replace the fpr anyway...does the black disc over the o ring stay on when replacing the fpr? The one on there now doesn't have a black disk holding the o ring....thanks

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post #6 of 7 Old 08-18-2018, 10:43 PM
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The black disc/plug is removed before mounting FPR. It's just a travel/storage grommet. If it's not removed your FPR will not work since there will be no fuel flow through unit.
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post #7 of 7 Old 08-20-2018, 08:29 AM Thread Starter
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That's what I thought. Thanks!

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