Engine miss and VERY poor gas milage


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Redscot
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Joined: Sun Mar 25, 2018 4:18 pm
Location: Rocky River, Ohio
Motorcycle: 1985 GL 1200 Interstate

Engine miss and VERY poor gas milage

Post by Redscot » Sun Jun 03, 2018 9:11 am



Ok...another boneheaded moment. Turning right on an inclined, banked and about a 170 degree turn, the car in the opposite direction decides that he wants some of my lane as well. Hit the clutch and brakes and stopped, but by the time the landing gear was deployed (feet) I couldn't keep the bike on 2. Managed to hit the kill switch, and she landed on the crash bars but almost flat from the bank of the road.
I put the old girl on the side stand and got her restarted. The idle was low, about 500 RPM or so and now it has a very noticable miss.
I ran it down the highway and cruises fine and the idle RPM seems to be ok now but the miss is still there.
All plugs look good but I changed them anyway. Definately smells rich when it runs. Starts fine,
Any Ideas???



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DenverWinger
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Re: Engine miss and VERY poor gas milage

Post by DenverWinger » Mon Jun 04, 2018 7:25 am

Good place to start would be to check for spark at all 4 plug wires....
They say 98% of all Hardleys ever made are still on the road..... The other 2% made it home. :lol:
(I stole this from somebody on another GW site...) :roll:

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Redscot
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Re: Engine miss and VERY poor gas milage

Post by Redscot » Mon Jun 04, 2018 10:31 am

All cyl have spark. New plugs and properly gapped. fuel filter changed. Milage is about 35mpg. Runs strong at highway speeds (above approx. 3000 rpm and up.) Starts good.
Sounds like a miss and smells rich. Something in the Carburation?
Will it damage anything to "run it out" like this?
All suggestions are welcome.
Thanks to all!

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WingAdmin
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Re: Engine miss and VERY poor gas milage

Post by WingAdmin » Mon Jun 04, 2018 3:31 pm

Redscot wrote:
Mon Jun 04, 2018 10:31 am
All cyl have spark. New plugs and properly gapped. fuel filter changed. Milage is about 35mpg. Runs strong at highway speeds (above approx. 3000 rpm and up.) Starts good.
Sounds like a miss and smells rich. Something in the Carburation?
Will it damage anything to "run it out" like this?
All suggestions are welcome.
Thanks to all!
First things first, find out which cylinder it is. Start it from cold, and measure (i.e. feel) the exhaust headers, you're likely going to find one of them is heating up much slower (or not at all) than the others.

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Redscot
Posts: 7
Joined: Sun Mar 25, 2018 4:18 pm
Location: Rocky River, Ohio
Motorcycle: 1985 GL 1200 Interstate

Re: Engine miss and VERY poor gas milage

Post by Redscot » Mon Jun 04, 2018 5:43 pm

Ah, I never thought of that.
See what I come up with tonight and I'll post the results.
Thanks!

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Redscot
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Location: Rocky River, Ohio
Motorcycle: 1985 GL 1200 Interstate

Re: Engine miss and VERY poor gas milage

Post by Redscot » Tue Jun 05, 2018 9:23 pm

I checked all of the exhaust pipes and thay all seem to heat up about the same. I am wondering if carb cleaning and balancing would be in order.
All that's left I think!

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WingAdmin
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Re: Engine miss and VERY poor gas milage

Post by WingAdmin » Wed Jun 06, 2018 8:29 am

If it is missing and stumbling, I would first focus on electrical - spark.

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Redscot
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Location: Rocky River, Ohio
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Re: Engine miss and VERY poor gas milage

Post by Redscot » Wed Jun 06, 2018 10:08 am

Pulled the spark plugs and turned over the engine. All plugs are sparking. Replaced the plugs and no change was noticed. What would affect the 2~3k rpm range?
Started the bike last night and it sounded healthy. At a bit of a loss.

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Redscot
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Re: Engine miss and VERY poor gas milage

Post by Redscot » Wed Jun 13, 2018 8:39 pm

I was poking around and found the stator connector in bad shape. One connection is very corroded. The battery is charging at just over 14 volts so I may have caught it before the stator destructed.
This could be the source of my woes!
They'll get soldered together and then check the charging system output.
I'll let y'all know!

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Redscot
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Location: Rocky River, Ohio
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Re: Engine miss and VERY poor gas milage

Post by Redscot » Sat Jun 16, 2018 11:12 am

Found and repaired (bypassed) the corroded Stator connector. Runs MUCH better now!
Thanks to all!
Russ



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