Odd lose of power, 98 1500


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liljack
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Location: Vicksburg, MS
Motorcycle: 1998 GL1500 SE

Odd lose of power, 98 1500

Postby liljack » Mon Apr 23, 2012 8:27 am



Had a great ride to Tenn last Thursday and great riding in Tenn over the weekend. However, yesterday we head home. Hit the Interstate and run up to 75mph. Did fine for about 10 miles, then she "boggs down". I find a sweet spot in the throttle to keep power to the wheels and start wondering just what happened. then she's fine again. Stop later for gas, fill up. She starts as usual, idles great and revs as usual. But once again, over 65mph/3000rpm range she starts acting up again. Hit Hwy 22 in Canton, MS where limits are 45 and 55 and she runs great with plenty of power and throttle response, but back on I-20 same thing happens.
If I keep the speed below 65 and rpm's below 3000 she runs fine, plenty of power and response. Over 65mph and 3000 rpm's she boggs down, roll on the throttle and it sounds like she starves. Any idea?



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Ericson38
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Re: Odd lose of power, 98 1500

Postby Ericson38 » Mon Apr 23, 2012 9:33 am

Sounds fuel flow related-

Fuel filter, fuel cap (venting), or fuel pump ?

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liljack
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Re: Odd lose of power, 98 1500

Postby liljack » Mon Apr 23, 2012 9:37 am

I was thinking along the same lines, but what has me confused is that it runs perfect up to 65mph/3000rpm range and only acts up after that range.

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WingAdmin
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Re: Odd lose of power, 98 1500

Postby WingAdmin » Mon Apr 23, 2012 11:32 am

liljack wrote:I was thinking along the same lines, but what has me confused is that it runs perfect up to 65mph/3000rpm range and only acts up after that range.


Perhaps the vent cap isn't completely plugged - it can allow air in at lower speeds, but when the higher fuel demands (i.e. higher fuel flow) of higher speeds occurs, it can't keep up, a vacuum builds up in the tank, and you start experiencing fuel starvation.

Easy way to tell - go out, wait until it bogs down, open the fuel cap. If it suddenly comes back to life, you've found your culprit.

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liljack
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Re: Odd lose of power, 98 1500

Postby liljack » Mon Apr 23, 2012 12:50 pm

Thanks, I'll give that a shot. Would be nice if that is all it is.

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liljack
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Re: Odd lose of power, 98 1500

Postby liljack » Mon Apr 23, 2012 3:57 pm

Well, tried the vet cap test out. Still bogged down above 65mph/3000rpm range. Acts as though something kicks in around that rpm range?

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robb
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Re: Odd lose of power, 98 1500

Postby robb » Mon Apr 23, 2012 10:35 pm

Could be the fuel filter, depending on how much it is stopped up it will limit fuel supply. Takes about 20% more fuel to run to run 65 + than it takes to run 45-55.

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virgilmobile
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Re: Odd lose of power, 98 1500

Postby virgilmobile » Tue Apr 24, 2012 8:09 am

It can also be a stuck slide.You would have to pull the air cleaner off to check it.

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liljack
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Re: Odd lose of power, 98 1500

Postby liljack » Tue Apr 24, 2012 12:46 pm

Thanks, gives me more to look at and check. On the filter, no Honda shop here. Is the filter specific to the Wing or can I get a filter from Wally World that will mate up?
Thanks

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virgilmobile
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Re: Odd lose of power, 98 1500

Postby virgilmobile » Tue Apr 24, 2012 2:07 pm

Not sure what WM has.I'd be taking the old filter with you.
There is one other thing that comes to mind.this is remote but as a last resourt,check the vacuum fuel shutoff system.it has a diaphragm and a vacuum line to the right intake that could be leaking vacuum and shutting the fuel off.My 88 had 5 vacuum lines that caused a wide array of problems.They usually fail at the sharp 90* bends.

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MikeB
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Re: Odd lose of power, 98 1500

Postby MikeB » Wed Apr 25, 2012 12:18 am

I had that problem with my '99. The Auto Fuel Valve failed. There is a test for it in the Service Manual. Its on page 4-17 0f the Factory manual.
Here it is:

The valve is located just forward of the gas cap.
It is item # 4 in this diagram. Item #2 is the fuel filter. By the way, there is no automotive filter that looks and fits like the Honda OEM filter. Get one from your Honda dealer, even if it does cost $15.00. Stay away from the EMGO filters.
MikeB
Tacoma, WA, USA

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liljack
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Re: Odd lose of power, 98 1500

Postby liljack » Thu Apr 26, 2012 4:47 pm

Thanks for all the suggestions guys, happy to say I changed the fuel filter after work today and just got from a very good test ride. :D




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