76 gl1000 2nd cyl not firing


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jellyfishmoonpie
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Motorcycle: 1976 GL1000
1997 Heritage Softail Custom

76 gl1000 2nd cyl not firing

Postby jellyfishmoonpie » Tue Sep 10, 2013 7:52 pm



Can anyone help me? Only the 2nd cylinder is not firing. The front left one. All others are fine.



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dingdong
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Re: 76 gl1000 2nd cyl not firing

Postby dingdong » Wed Sep 11, 2013 7:15 am

Spark, fuel or compression. Have you checked anything yet?
Tom

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jellyfishmoonpie
Posts: 18
Joined: Fri Jul 26, 2013 10:06 pm
Location: Cleveland Heights, Ohio
Motorcycle: 1976 GL1000
1997 Heritage Softail Custom

Re: 76 gl1000 2nd cyl not firing

Postby jellyfishmoonpie » Wed Sep 11, 2013 7:26 am

It's got spark and fuel. I think the problem is a sparkplug not tightened down but I haven been able to check. I'll definitely check tonight.

jellyfishmoonpie
Posts: 18
Joined: Fri Jul 26, 2013 10:06 pm
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Motorcycle: 1976 GL1000
1997 Heritage Softail Custom

Re: 76 gl1000 2nd cyl not firing

Postby jellyfishmoonpie » Wed Sep 11, 2013 10:56 am

also, im having a problem with getting the bike into 1st, it will go into 2,3,4,5 but not first, if i shift all the way down it just pops into neutral. bent shift fork maybe?

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portugeezer
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Re: 76 gl1000 2nd cyl not firing

Postby portugeezer » Thu Sep 12, 2013 6:31 am

I would pull that plug out and see if it's wet from gas. My bike had some weird shifting things when I got it. I had two problems one was that it had sat for so long the oil was like tar and had some things inside gummed up. Ran some MMO in the crankcase and that cleared part of it up. The other half was someone used an extra long choke cable and either routed it wrong intentionally to use the extra length or just forgot how it was supposed to go. Check the routing and how it's adjusted. I also cannot get my bike to go into neutral to this day if I have a passenger on. How low the bike sits seems to have an effect on how it shifts.

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artgrantz
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Re: 76 gl1000 2nd cyl not firing

Postby artgrantz » Fri Sep 13, 2013 7:31 am

The spark plug wire can pull off of the contact inside the boot and cause a very weak or no spark. If it is loose you can remove the boot from the plug and screw it back onto the wire. It may help to trim the wire back a bit.

jellyfishmoonpie
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1997 Heritage Softail Custom

Re: 76 gl1000 2nd cyl not firing

Postby jellyfishmoonpie » Fri Sep 13, 2013 7:39 am

I just realized something. Could it be because there is a hole in the carb vacuum cover? I did the notice till now

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wjnfirearms
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Re: 76 gl1000 2nd cyl not firing

Postby wjnfirearms » Fri Sep 13, 2013 12:03 pm

Not sure about the vacuum cover or not. Either way, it needs fixed because it will effect something.

First things first. ALWAYS remember the K.I.S.S. Principle. KEEP IT SIMPLE, STUPID. Words to live by. There's little worse than over-complicating a diagnosis. Costs one much time and often too much money.

Check for spark at both the wire and plug. You need to rule out the coil, wire and plug itself. If good, move on.

Valve issues at that cylinder can keep it from firing. Either the exhaust or intake valve being stuck or broken will prevent firing. I'd check this carefully if you get to this stage of the diagnosis.

The shift issue could be related to a shift fork. A common reason for shifting difficulty.
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jellyfishmoonpie
Posts: 18
Joined: Fri Jul 26, 2013 10:06 pm
Location: Cleveland Heights, Ohio
Motorcycle: 1976 GL1000
1997 Heritage Softail Custom

76 gl1000 new problems

Postby jellyfishmoonpie » Sat Sep 14, 2013 4:24 pm

success! it was infact the hole in the vacuum cover! now that i got the chance to ride it around the block for the first time ever (so fun, and i was terribly excited!) i found two more problem but they seem like easy problems to fix. the speedometer isnt working at all.and the bike wont run past 3000 rpm under load, but when sitting on the center stand in neutral it will. all suggestions are welcome, this forum has been a huge help in getting my first bike running! thanks everyone!

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wjnfirearms
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Re: 76 gl1000 2nd cyl not firing

Postby wjnfirearms » Sun Sep 15, 2013 7:35 am

One problem down. Good deal.

The load issue is definitely carb related. The thing with change on the center stand or tilted is a classic symptom with the older GW carbs. The carbs need rebuilt. If you attempt a rebuild yourself, or have someone else do it, get your parts from Randakk.

Speedometer is likely a cable. easy fix and the cables are easily obtainable.
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jellyfishmoonpie
Posts: 18
Joined: Fri Jul 26, 2013 10:06 pm
Location: Cleveland Heights, Ohio
Motorcycle: 1976 GL1000
1997 Heritage Softail Custom

Re: 76 gl1000 2nd cyl not firing

Postby jellyfishmoonpie » Sun Sep 15, 2013 9:02 am

The carbs were just rebuilt with randakk kit :/

jellyfishmoonpie
Posts: 18
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Location: Cleveland Heights, Ohio
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Re: 76 gl1000 2nd cyl not firing

Postby jellyfishmoonpie » Tue Sep 17, 2013 8:10 pm

bump for helpppp. i was thinking of running the tank with half a can of seafoam?

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wjnfirearms
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Re: 76 gl1000 2nd cyl not firing

Postby wjnfirearms » Wed Sep 18, 2013 7:16 am

Won't hurt, might help. But the symptoms of of running under load and the change in idle upon tilting the bike or standing up straight are carb related. Floats likely sticking in at least a couple of the carbs.
Member, Patriot Guard Riders, Blue Knights LEMC, PA VII

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pricey1123
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Re: 76 gl1000 2nd cyl not firing

Postby pricey1123 » Fri Sep 27, 2013 8:40 am

Carbs need syncing? Just a thought




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