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I have been having an intermittent problem with my bike dying while sitting at a stop light or sign. This usually occurs after my 40 mile drive home from work. It is idling at around 1,000 RPM at the stop in first gear. Suddenly it sputters and dies. Luckily I have been able to restart it immediately so the 8 vehicles behind me don't start honking.



The temp guage is at the 5 mark and generally jumps to 6 while sitting. All my driving is freeway until I jump off the exit and get to the light, so this is the only time it happens. When I start it up in the morning, I can stop and it doesn't miss a beat. Any ideas of what may be happening????
 

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Monkey with a Football
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If that is the 1200 LTD, how hot is the fuel pump at that time?
 

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Rudy, it is an LTD. I will check the temp when I get home tonight. I did touch it, but of course it has the bling over it. What would be the temperature it would cut out at??
 

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Is the gas tank cap venting OK?

LOL!!
 

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Monkey with a Football
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Winger in San Diego wrote:
Rudy, it is an LTD. I will check the temp when I get home tonight. I did touch it, but of course it has the bling over it. What would be the temperature it would cut out at??
Scalding hot usually but if it is near that, especially if well covered, then the engine heat can make it act up. I think the pump starts to stall and pressure drops. The injected pumps have to run some pretty good pressure to make things go right.
Also you could be starving from a nearly clogged fuel filter as well.
But my guess is you give it a good workout fast and then the slowdown creates a heat whiplash effect on it. Still hot in there from the run but not enough cooling air to overcome the large thermal mass of the engine and pump.

When I have seen these stall, it was summertime and going up mountains at around 45 mph where the engine heat made the pump shutdown altogether. You had to cool it down before it would restart.
 

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Discussion Starter · #6 ·
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I will check the vent on the gas cap. I do go from sea level to around 1800 feet. I will check the temp on the pump tonight and also the fuel filter. Thanks for the help.
 

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1987 GL1200 Interstate
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There are 6 or 7 million sensors on that bike. Any one of them could be going south.

Have you got the additional service manual for the machine?

I have a friend who used to have one of those bikes and I'm going to e this to him for an opinion.
 

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I don't own it any more,:crying: but out here in the desert that was a pretty common symptom and indicated that your pulse generator located under the belt cover in front was failing.
Usually from high heat. If it is the pulse generator (and I'm about 95% sure of it) then you need to replace it. As of a year or so ago, you were able to get a new one from one of the online parts vendors. (like Bike Bandit or Honda's Online parts store)
At that time it was in the neighborhood of $40.00.

Pegasus aka: Frank
 

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I purchased a pulse sensor a few months back for another problem I had that has sense been corrected. I may have to re-visit replacing it. Dennis: I just ordered a Clymer manual, hopefully this will be helpful in tracking this down. Thanks
 

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I'd certainly go with Frank's recommendation. He knows the LTDs pretty well.

I think Honda had a separate addendum type service manual for the LTD. That's the manual I was referring to.
 

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Discussion Starter · #11 ·
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I have it and will go through it again. It is the LTD supplement manual. Thanks
 
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