1500 fuel problems - Steve Saunders Goldwing Forums

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post #1 of 16 (permalink) Old 04-07-2019, 09:19 AM Thread Starter
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1500 fuel problems

Ok sharpen your pencils .
What is the vacuum hose on the ECM do???
Think my fuel pump is shutting down haven't come across any info on it.


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post #2 of 16 (permalink) Old 04-07-2019, 09:53 AM
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The vacuum to the ECU tells it what load the engine is under to adjust timing accordingly. Has nothing to do with the fuel pump.

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post #3 of 16 (permalink) Old 04-07-2019, 10:00 AM Thread Starter
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could be shutting down the timing also. Bike just looses power and stops no missing sputtering backfires nothing just stops. shutdown 4 times when it was 50 ran great when it was 40.


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post #4 of 16 (permalink) Old 04-07-2019, 11:27 AM
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Might be coincidence it shut off at 50 and not 40. It could also be the vacuum petcock. When you increase speed manifold vacuum drops. If there is a hole in the diaphragm it's possible at higher speeds there is not enough vacuum at the petcock to hold it open. Does the bike coast to a stop then? Start right back up or do you have to wait forr a while? Need more info.
The bike will start and idle crappy but run forever with the hose to the ECU disconnected. It would run fine at 40 or 50.
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post #5 of 16 (permalink) Old 04-07-2019, 11:38 AM Thread Starter
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Thank You. Almost sounds like the old vacuum advance of years past with transistors.


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post #6 of 16 (permalink) Old 04-07-2019, 11:48 AM
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Bypass the vacuum petcock then test drive again.

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post #7 of 16 (permalink) Old 04-07-2019, 11:51 AM Thread Starter
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New valve plus vac checked . New mother Honda fuel pump/filter capacity test one with hose one with filter checked after it died. Acted like out of gas uncovered the carbs and no gas from the accelerator pump.
Next day it was working.


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post #8 of 16 (permalink) Old 04-07-2019, 12:06 PM
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Quote:
Originally Posted by redwingrider3 View Post
New valve plus vac checked . New mother Honda fuel pump/filter capacity test one with hose one with filter checked after it died. Acted like out of gas uncovered the carbs and no gas from the accelerator pump.
Next day it was working.
What year is the bike. Some used a relay to run the pump while others had a transistor in the ECU that operated the pump. The transistor had a history of failing but either might fail. Maybe try hot wiring the pump and take it for a ride being careful not to crash, No safety shutdown on the pump if you crash.

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post #9 of 16 (permalink) Old 04-07-2019, 12:29 PM Thread Starter
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Gas cap is good. Plugs/timing belts are fine when it runs it runs beautiful just can't trust it.


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post #10 of 16 (permalink) Old 04-07-2019, 12:33 PM Thread Starter
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97 that I keep like new/95000 miles. It's birthday week 22yo


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