86 SEI Running rough suddenly - Page 2 - Steve Saunders Goldwing Forums
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post #11 of 48 (permalink) Old 04-28-2019, 10:55 AM Thread Starter
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Quote:
Originally Posted by Rednaxs60 View Post
I think Dennis made a comment a while back regarding these FI bikes in that he wouldn't put fuel in one without having the manuals - good advice. PM sent.
Fair enough. Thank you sir!!

I got rid of my alluminum wings and picked up a Goldwing. Here to be a Light.

Budd
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post #12 of 48 (permalink) Old 04-28-2019, 04:59 PM Thread Starter
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Check these helpful pages.
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I got rid of my alluminum wings and picked up a Goldwing. Here to be a Light.

Budd
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post #13 of 48 (permalink) Old 04-28-2019, 06:48 PM Thread Starter
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Update,

After running around this morning, letting it cool down to atmospheric temperature then running it again, it is running way better but extremely rich. I think a sensor or a vacuum tube isn’t right.

Reading the book I have reads to clean the throttle valve and sync every 8k miles just like carb syncing...
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I got rid of my alluminum wings and picked up a Goldwing. Here to be a Light.

Budd
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post #14 of 48 (permalink) Old 04-28-2019, 06:50 PM
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Black smoke, white smoke, blue smoke. Once you get the manual, locate the pressure regulator. Check the vacuum line to it. Inspect the line for fuel. The pressure regulator may be ruptured allowing fuel into the intake un-metered. Check the fuel pressure if you have the tools available. Generally speaking, removing the vacuum hose from the regulator will increase fuel pressure @10psi. Pull the hose and plug it with your finger. Note the change in rpm. Increase means your running lean. Decrease would indicate mixture was already close to correct. Leaving the vacuum line disconnected during this test will speed up the engine. More fuel. More air.

Libraries are full of stuff I don\'t know.
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post #15 of 48 (permalink) Old 04-28-2019, 07:17 PM
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Quote:
Originally Posted by EAGLECRY24 View Post
After a mile or so the “Fuel System” light came on and the idle came up to 1800 or so and it ran wayyy better. Of course after turning the bike off and back on again clears the message and the idle drops back down to around 800 rpm and running rough sometimes dieing and starting back up.
Hello! The light comes on and it runs better. This indicates the ECM saw the malfunction and went into fail-safe mode. (Fixed values) Turning it off erased the learning and it ran like crap again.
Check the code sheet for inputs that cause locked values. You can ignore the ones that "stop" ignition or fuel signals.
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post #16 of 48 (permalink) Old 04-28-2019, 09:48 PM Thread Starter
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So... I’m not really sure what’s going on anymore... I checked everything I know to check and put it back together. Ran it for a bit and the idle slowly came up to 2400rpm and I adjusted it down to spec (1000 +- 50). The thing is purring like a kitten for now...

I got rid of my alluminum wings and picked up a Goldwing. Here to be a Light.

Budd
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post #17 of 48 (permalink) Old 04-29-2019, 12:18 AM Thread Starter
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Update,

Turns out that seafoam in the gas saved me a heartache of extraneous and unnecessary maintenance. This thing is purring like a kitten now. The link below is a video of the idle (a little low) smooth. After pouring half a can of Seafoam, 3/4 of a big bottle of Marvel and a full bottle of Mechanic in a Bottle on around 1/2-3/4 tank of gas and running it hard and shutting it down till it cooled completely then running it again hard. The brief ride this evening was smooth and powerful. The acceleration was smooth and absolutely no hiccups at idle or high RPM (5-5500). Not sure what exactly cured it but it’s good now.

https://youtu.be/UfP3bv6Hkzs
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I got rid of my alluminum wings and picked up a Goldwing. Here to be a Light.

Budd
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post #18 of 48 (permalink) Old 04-29-2019, 12:22 AM Thread Starter
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Quote:
Originally Posted by glhonda View Post
Black smoke, white smoke, blue smoke. Once you get the manual, locate the pressure regulator. Check the vacuum line to it. Inspect the line for fuel. The pressure regulator may be ruptured allowing fuel into the intake un-metered. Check the fuel pressure if you have the tools available. Generally speaking, removing the vacuum hose from the regulator will increase fuel pressure @10psi. Pull the hose and plug it with your finger. Note the change in rpm. Increase means your running lean. Decrease would indicate mixture was already close to correct. Leaving the vacuum line disconnected during this test will speed up the engine. More fuel. More air.
I’m still interested to see the results of this test and maybe check the manifold vacuum balance.

I got rid of my alluminum wings and picked up a Goldwing. Here to be a Light.

Budd
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post #19 of 48 (permalink) Old 04-29-2019, 01:04 AM
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I have had good results with SeaFoam in the past on my 1500s, a 94 and a 98

~ John


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post #20 of 48 (permalink) Old 04-29-2019, 09:16 AM
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Have to ask. How did you adjust the idle. Did you use the idle screw that is on the throttle linkage midway between the right left cylinder bank, or the screw under the CFI cover on the right cylinder bank?

Looked at the YouTube and the engine does sound good. Noticed you have the dash on the oil temp/pressure settings as well. I'd bring the idle closer to 1000.

Cheers

"When writing the story of your life, Don't let anyone else hold the pen"

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