misfire 1983 aspencade


Information and questions on GL1100 Goldwings (1980-1983)
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billviera
Posts: 11
Joined: Thu Jul 26, 2012 11:20 pm
Location: Portland, Oregon
Motorcycle: 1983 gl1000 aspencade

misfire 1983 aspencade

Postby billviera » Thu Jul 26, 2012 11:32 pm



i recently bought a 1983 aspencade gl1100 59,000 miles --- it was running well but i pushed it to see how much power it had and at 5500 rpm it started missing--- now it is missing and firing at the wrong time but will idle---lack of power. I have 95 90 90 and 120 compression / it has spark on all cylnders what what should i do or inspect next and where do I go from here?

help please

bill



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seabee_
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Re: misfire 1983 aspencade

Postby seabee_ » Fri Jul 27, 2012 6:36 am

What is the color and condition of the spark plugs?
Paul
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billviera
Posts: 11
Joined: Thu Jul 26, 2012 11:20 pm
Location: Portland, Oregon
Motorcycle: 1983 gl1000 aspencade

Re: misfire 1983 aspencade

Postby billviera » Fri Jul 27, 2012 8:30 am

plugs are tan tan tan and tan to black---- no excessive oil

bill

bustedwing
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Re: misfire 1983 aspencade

Postby bustedwing » Fri Jul 27, 2012 5:40 pm

A few things come to mind;maybe timing belt skip one tooth,head gasket starting to let go, and this is a weak one , but I have seen push rods bent from over reving but it doesn't hurt to check.Good luck, keep us updated.
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zamboni920
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Re: misfire 1983 aspencade

Postby zamboni920 » Fri Jul 27, 2012 8:00 pm

From 90 to 120 on compression test seems like a problem to me. Also, the 120 cyl plug was darker?! I do not know what the compression range is on the 1100 , but I had a similar problem recently on my 1200, except backwards. I had about 120 on 3 cylinders, and about 90 on one. Also, the symptoms was intermittent cutting out, Mostly at higher RPM's, and intake "popping" (backfire) under load.
Here is what I did(excerpt from other topic):

Compression test is sooooo much easier than another carb teardown .
Result..... Cyl # 2,3 and 4 read about 115 ....carb #1 (the one in question) read around 80 . Drytest. A squirt of oil in #1 and retest.....got it up around 95. I've got a problem. I was thinking ...remove crash bar, valve cover and head. Clean valves, lap or re grind . Hmmmmm, maybe there is an easier way to try first. Seafoam.....that is known for dissolving crud build up. Plug hole has direct access to the problem area.....and intake horn has direct access to valvestems and backside of valves.
Poured about half ounce into cylinder, tapped starter to distribute the Seafoam....another half ounce into intake, by way of vacuum sync screw opening, and tapped the starter again. I know seafoam is used in both oil and fuel, so I was not worried about it as a chemical. And with plugs out, I was not worried about hydrolock. Let it sit for about half hour or so. Cranked the engine about 30 seconds before plugs went back in, to expell leftovers. Plugs in....start up....lots of smoke (wich I expected).....but it runs sooooooo smoooooth .
Cleared up everything. No more miss, intermittent cut-out....and absolutely no popping or backfire. Pulls strong from low range to wide open. Beautiful :lol: :D .

Took it out today, drove it hard, backroads and highway.....it is smooth through entire range. For some reason, it even shifts nicer.

Read more: viewtopic.php?f=5&t=12667#ixzz21sH8cpC2

bustedwing
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Re: misfire 1983 aspencade

Postby bustedwing » Sat Jul 28, 2012 9:57 pm

Sounds like you may have loosened up some carbon when you did the first over-rev and the Sea Foam worked it out for you. Sometimes you have to try things nobody thought of and it's worth a try, what the hell, saved you a lot of possible work. Good going.


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