Tries to die when giving it gas


Information and questions on GL1500 Goldwings (1988-2000)
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fwsundance
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Motorcycle: 1997 Honda GL1500 Goldwing

Tries to die when giving it gas

Postby fwsundance » Mon Apr 01, 2013 6:06 pm



I have a 95 GL1500 Wing. Bike will start and idle fine as long as the choke is engaged. In order to take go I need to rev up the rpm's really high and pop the clutch. same when shifting. If I try to slowly accelerate, it wants to choke and die. Just had the carbs rebuilt and synced. It sat all winter with ethanol laced gas. Have also replaced the fuel filter. Any suggestions?



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virgilmobile
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Re: Tries to die when giving it gas

Postby virgilmobile » Mon Apr 01, 2013 10:45 pm

Were they just rebuilt,or last year.???
If you have to use the "choke"to keep it idling,the slow speed jets are plugged. The "choke"is a fuel enrichment valve that adds more fuel during warm up.
Here's just one thing to try before you pull the carbs.....
My left Carb had a bit of condensed water in it and plugged up the low speed side for half the engine.
I got lucky by using compressed air and a rubber tip nozzle...
Just in front of the gas cap on my 88 is a vent tube that goes into each Carb with a "T" connector.
With about 50 psi of air I literally blew out the plugged ports.It took about 10 seconds.
It may be worth a quick try.Nothing but air injected into the passages,no harm.

fwsundance
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Re: Tries to die when giving it gas

Postby fwsundance » Tue Apr 02, 2013 5:04 am

they were just rebuilt about a month ago. I'm going to give the air thing a try. I really appreciate the reply. Thanks
Jay

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dingdong
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Re: Tries to die when giving it gas

Postby dingdong » Tue Apr 02, 2013 7:20 am

Was this same symptom happening before the carb rebuild or is this something new since the rebuild?
Tom

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ct1500
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Re: Tries to die when giving it gas

Postby ct1500 » Tue Apr 02, 2013 9:32 am

The cold enrichment system (choke) adds both air and fuel.

Driveability concerns aside with popping the clutch and choke on core problem is bike will not idle. You need to figure out if running rich with black smoke,smelly exhaust and fouled plugs or lean with white plugs. Spraying a little carb clean down carbs while it wants to die is a good indicator if it will stay running longer for lean condition. Careful with sprays around composite slides use the straw and shoot below.

If rich carbs out, if lean check for vacuum leaks and carbs out if none. Check for proper vacuum and operation of auto fuel valve.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

fwsundance
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Re: Tries to die when giving it gas

Postby fwsundance » Wed Apr 03, 2013 5:59 pm

thank you for the replies. Can't say if it was doing it prior to carbs rebuild. Bike had been set up since last summer

john pasterjak
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Re: Tries to die when giving it gas

Postby john pasterjak » Thu Apr 04, 2013 11:54 am

I noticed someone suggested checking for proper vacuum when trouble shooting a carb problem. What is a normal vacuum reading at idle? Secondly I have been doing all my testing with the air cleaner and top cover removed. I do have the 2 vac hoses plugged off. Could I be getting false responses with this procedure?

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ct1500
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Re: Tries to die when giving it gas

Postby ct1500 » Thu Apr 04, 2013 1:26 pm

john pasterjak wrote:I noticed someone suggested checking for proper vacuum when trouble shooting a carb problem. What is a normal vacuum reading at idle? Secondly I have been doing all my testing with the air cleaner and top cover removed. I do have the 2 vac hoses plugged off. Could I be getting false responses with this procedure?


When diagnosing carb problems and working on them you will always have the box removed, how else could you get to them. :D Running without the box will lean it a smidge and has very little effect in the big picture of things with a clean air filter.

When vacuum was mentioned it was in regard to the auto fuel valve being supplied.

Vacuum readings will vary among bikes state of tune and my mercury sticks will probably not give the same reading of a HF mechanical or ATF filled home made gauge. They are tools used to judge differences between sides and at different RPM's of what the carbs and engine are doing. As long as your gauges are accurate (statically) to one another that is what counts.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

john pasterjak
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Re: Tries to die when giving it gas

Postby john pasterjak » Thu Apr 04, 2013 7:13 pm

Thanks for the response. I was wondering about running without the top cover in place. I shall continue my quest to resolve the acceleration problem. My next step is to re-check the float levels (again).

Larrs2
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Re: Tries to die when giving it gas

Postby Larrs2 » Fri Apr 05, 2013 6:34 am

If it runs ok after you are on the road the float level is likely ok. You need to ck for vacuum line leaks or a base leak (the clamps around the carb to intake or the short hose) . If you spray something flammable around the base of the carb. and the rpm increases that is where the leak is. If it stays at the same rpm you have plugged low speed passages.

fwsundance
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Re: Tries to die when giving it gas

Postby fwsundance » Mon Apr 08, 2013 6:39 pm

thanks again for the great relies and suggestions. will keep trying them all until something works. You guys are awesome

Jay




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