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1Back to top Go down    missfire help needed 1990 k100lt on Sat Jul 16, 2016 9:21 am

dakelvinator

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Hi I have just done 800 mile trip around Ireland without a problem until the last day of driving i was very low on fuel (on fumes!) then i lost power so i pulled over and tried starting it = nothing turning over but not even trying, after about 5 mins it started and i got about a mile (trying to find fuel) then same thing so left it for 5 mins and started again found fuel filled up but same thing about a mile later so decided to get a tow truck to the ferry (i was 3 miles from Dublin port - so close and yet so far!). Got to Hollyhead convinced it was the fuel pump then i set off thinking i would get out of traffic at hollyhead and get AA help when it played up again, but it kept going! I did over 150 miles! the only difference was i left the coke on half (although i don't think that is relevant). Anyway It now is misfiring (i have`int used it since) I have put a new fuel pump (aftermarket no mods) so i am now thinking its an electrical problem any suggestions? could this be coils causing this? thanks k.

    

2Back to top Go down    Re: missfire help needed 1990 k100lt on Sat Jul 16, 2016 10:20 am

Holister

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check for spark on each lead to determine which cylinders are misfiring. Are the plugs wet or dry?
Try new spark plugs.
Or you might have corrosion on the HT lead connection at the coil.


__________________________________________________
1988 K100RT     VIN No.  0094680
1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
     Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

3Back to top Go down    Re: missfire help needed 1990 k100lt on Sat Jul 16, 2016 1:46 pm

dakelvinator

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@Holister wrote:check for spark on each lead to determine which cylinders are misfiring. Are the plugs wet or dry?
Try new spark plugs.
Or you might have corrosion on the HT lead connection at the coil.
Hi thanks for that i took a look at the HT leeds just wiggled them and it seem to have sorted it (i don`t want to speck too soon!) I left it running till it got nice and hot went for a quick blast down the road and it was running fine! They are the original HT leeds and look a bit tatty so i will get some new ones after all it has 95k on it, I will test it further with a long drive just to be sure. thanks k.

    

4Back to top Go down    Re: missfire help needed 1990 k100lt on Sat Jul 16, 2016 4:51 pm

Dai

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It sounds like the caps have corroded inside - not an uncommon problem. Try these guys for new leads:

http://www.ebay.co.uk/itm/BMW-K75-K100-K1100-ht-ignition-leads-/191917759802?hash=item2caf309d3a:g:ydMAAOSw6wRXAOxw

Alternatively, go straight to their website:

http://realmengineering.com/ram%20power%20leads.html

Price is the same and the aftermarket support is brilliant. I had one lead fail after almost two years and they replaced by the next post.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

5Back to top Go down    Re: missfire help needed 1990 k100lt on Sat Jul 16, 2016 7:40 pm

Holister

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Before you go shelling out £60 for new HT leads just check what condition your existing leads and plugs are in as you may not need new leads or you could be simply installing new leads into a poor situation.
1. Do you have 'terminal nuts' screwed onto the top of your plugs? Without these you won't get a good connection and arcing will wear away the connector inside. If the connection inside the plug socket is not corroded too bad, sometimes just a cleanup is all that's needed.
2. Check for corrosion where the HT leads plug into the bottom if the coils.
3. Make sure you're using non-resistor NKG D7EA plugs with your resistor leads.

Use a little dielectric grease when reinstalling the leads.


__________________________________________________
1988 K100RT     VIN No.  0094680
1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
     Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

6Back to top Go down    Re: missfire help needed 1990 k100lt on Sun Jul 17, 2016 12:31 pm

dakelvinator

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@Dai wrote:It sounds like the caps have corroded inside - not an uncommon problem. Try these guys for new leads:

http://www.ebay.co.uk/itm/BMW-K75-K100-K1100-ht-ignition-leads-/191917759802?hash=item2caf309d3a:g:ydMAAOSw6wRXAOxw

Alternatively, go straight to their website:

http://realmengineering.com/ram%20power%20leads.html

Price is the same and the aftermarket support is brilliant. I had one lead fail after almost two years and they replaced by the next post.
Thanks for the link I will be needing it!

    

7Back to top Go down    Re: missfire help needed 1990 k100lt on Sun Jul 17, 2016 12:45 pm

dakelvinator

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@Holister wrote:Before you go shelling out £60 for new HT leads just check what condition your existing leads and plugs are in as you may not need new leads or you could be simply installing new leads into a poor situation.
1. Do you have 'terminal nuts' screwed onto the top of your plugs? Without these you won't get a good connection and arcing will wear away the connector inside. If the connection inside the plug socket is not corroded too bad, sometimes just a cleanup is all that's needed.
2. Check for corrosion where the HT leads plug into the bottom if the coils.
3. Make sure you're using non-resistor NKG D7EA plugs with your resistor leads.

Use a little dielectric grease when reinstalling the leads.
Hi everyone thanks for your help Very Happy  well a little update I took the leads off at the coils and they looked very tatty but ok as in no corrosion looks like someone put some silicone in the leads probably to keep any damp out however on the coil for cylinder no 1 their is a chunk missing out of where the lead clips on! anyway put them back on and it ran fine so weather it was a dicky lead or where the chunk is missing that caused the misfire I don`t know? I also checked the spark plug end as well but all ok their, I put new plugs in it about 1k ago. I will get some new leads anyway. I have just taken it out for a drive about 20 miles and it ran perfect, so I will continue to drive it and see what happens if anything. Thanks again for the support k.

    

8Back to top Go down    Re: missfire help needed 1990 k100lt on Sun Jul 17, 2016 1:23 pm

kennybob

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Start it up at night in the dark and see if you have a little lightning storm arcing off around those leads, especially where the chunk is missing.

    

9Back to top Go down    Re: missfire help needed 1990 k100lt on Sun Jul 17, 2016 3:22 pm

dakelvinator

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@kennybob wrote:Start it up at night in the dark and see if you have a little lightning storm arcing off around those leads, especially where the chunk is missing.
Hi thanks that`s a good idea I will try that  k.

    

10Back to top Go down    Re: missfire help needed 1990 k100lt on Mon Jul 18, 2016 5:13 am

92KK 84WW Olaf

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You came all the way over to Ireland and didn't tell us.....a nice opportunity to meet up with some fellow forum members missed out on.

For anyone coming over here we Eccentrics are scattered around the country and we always welcome an opportunity to share a coffee or a beer or a few miles. I don't think at any point you can be more than 100 miles from a forum member even out in the Wild Atlantic Way. Rest of the country I reckon 50 miles is tops.

Equally if anyone has a bother I am sure we will try to get someone sorted out. Only a week earlier I sorted someone out with a fuel pump for a K75. He sure didn't expect to be able to lay his hands on one in a few hours but he got my spare which is now being replaced.


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500 miles
    

11Back to top Go down    Re: missfire help needed 1990 k100lt on Mon Jul 18, 2016 1:17 pm

dakelvinator

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@92KK 84WW Olaf wrote:You came all the way over to Ireland and didn't tell us.....a nice opportunity to meet up with some fellow forum members missed out on.

For anyone coming over here we Eccentrics are scattered around the country and we always welcome an opportunity to share a coffee or a beer or a few miles. I don't think at any point you can be more than 100 miles from a forum member even out in the Wild Atlantic Way. Rest of the country I reckon 50 miles is tops.

Equally if anyone has a bother I am sure we will try to get someone sorted out. Only a week earlier I sorted someone out with a fuel pump for a K75. He sure didn't expect to be able to lay his hands on one in a few hours but he got my spare which is now being replaced.
Hi I did mention it on a past post and gave dates, but I will be over again as I am a regular visitor back home. I just had not been up north ever but I can tell you I had such a good time I will be back and hope their will be another opportunity in the future as I would love to meet some Eccentrics!  Equally if anyone is in the Lancashire/Manchester area and wishes to share a coffee/beer or a drive give me a shout Smile

    

12Back to top Go down    Re: missfire help needed 1990 k100lt on Mon Jul 18, 2016 1:33 pm

92KK 84WW Olaf

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If coming PM me and we will see what we can do!!! It goes to my email address.

So how far did you get? Gaz80 and BornAgain Eccentric and 88 will testify to some good food down in Cork.....And we have a brewery AND a distillery here too!!!!

Now you have to come back!!!


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500 miles
    

13Back to top Go down    Re: missfire help needed 1990 k100lt on Mon Jul 18, 2016 3:13 pm

dakelvinator

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@92KK 84WW Olaf wrote:If coming PM me and we will see what we can do!!! It goes to my email address.

So how far did you get? Gaz80 and BornAgain Eccentric and 88 will testify to some good food down in Cork.....And we have a brewery AND a distillery here too!!!!

Now you have to come back!!!
cool I hope to be Wexford before the end of the year so I will let you know my plans  Very Happy. I got up to the causeway and Bushmills all round that area I had very good weather so I was lucky,  cheers

    

14Back to top Go down    Re: missfire help needed 1990 k100lt on Wed Jul 20, 2016 6:15 am

92KK 84WW Olaf

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You got to a great corner of the country. The Eccentrics Norn Iron weekend in September has been up there a few times in glorious sunshine. Home for Comberjohn, Dai, Markzz and GMcQ.  To be fair if you had good weather there you had no reason to travel anywhere else.

Let us know when you are coming back to Wexford, maybe pop a thread up for it when you know more.


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500 miles
    

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