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1Back to top Go down    Old gas/new gas on Sat Aug 09, 2014 8:45 pm

BooG

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Mixed some old gas in a plastic jerry can with half a tank of new gas in an attempt to get rid of it, and...
1) Smoking
2) Backfires
3) Evolving engine rattle..getting worse
4) Loss of power...
I think the valves might have suffered......
any pearls of wisdom?

    

2Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:09 pm

BooG

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Maybe the injectors have deposits....
big old backfires, like gunshots!

    

3Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:14 pm

Mort

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How old was the "old gas"?


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92 K100LT
    

4Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:22 pm

BooG

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eerrrmmmm......2 years....ish.....

    

5Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:24 pm

Mort

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@BooG wrote:eerrrmmmm......2 years....ish.....


Ok, it is 4 year old pish...Laughing


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92 K100LT
    

6Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:27 pm

BooG

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Not more than four, but no younger than 2! Not exactly sure.
I read somewhere that the only way to dispose of old gas is to add it to existing gas, and burn it off. I would advise anyone reading this NOT to try it!!...certainly not in the case of a 1988 K75S!

    

7Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:30 pm

Mort

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@BooG wrote:Not more than four, but no younger than 2! Not exactly sure.
I read somewhere that the only way to dispose of old gas is to add it to existing gas, and burn it off. I would advise anyone reading this NOT to try it!!...certainly not in the case of a 1988 K75S!

I use stuff like this in my chain saw, modern additives do not work well as a fuel, OK as a solvent but not worth the agro in an engine.


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8Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:34 pm

BooG

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I guess I'll have to remove the valve/rocker cover and inspect. May need to remove the head to clean it and reset the valves. Blimey....!!! I'm kicking myself!!!

    

9Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:45 pm

Mort

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@BooG wrote:I guess I'll have to remove the valve/rocker cover and inspect. May need to remove the head to clean it and reset the valves. Blimey....!!! I'm kicking myself!!!

Seriously mate, I doubt it's that bad, drain the old stuff out of the tankand start again.


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92 K100LT
    

10Back to top Go down    Re: Old gas/new gas on Sat Aug 09, 2014 11:55 pm

BooG

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But....what do I do with the old gas? Back to square 1! Will have to get shot of it somehow, but council say they don't take petrol.
Is there some kind of additive that can help clean the valves?

    

11Back to top Go down    Re: Old gas/new gas on Sun Aug 10, 2014 12:02 am

floyd

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I know nothing

BUT I did watch this the other day.... (NB its not just about oil)


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1984 K100 Adventure Bike
    

12Back to top Go down    Re: Old gas/new gas on Sun Aug 10, 2014 3:04 am

Ghost who rides

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Unlikely you would damage valves that quickly, pull the spark plugs and clean them.
Give the gas to a car driver or put it in yours if you have one.


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1986 K 75 C 2nd owner 187,000kms showing .
1987 K100RT Police repainted, rough and unloved.
    

13Back to top Go down    Re: Old gas/new gas on Sun Aug 10, 2014 4:09 am

RicK G

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You wont have damaged anything except maybe the spark plugs. Old fuel doesn't burn and will usually not even start even with fresh fuel added. Add it to fresh tanks of fuel about 1 litre at a time to get rid of it or leave it outside on the footpath and some mug will steal it and have their car conk out on them just down the road and you can go take the piss out of them for stealing it and make them buy you a fresh can.Very Happy


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

14Back to top Go down    Re: Old gas/new gas on Sun Aug 10, 2014 1:25 pm

BooG

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That Archoil stuff looks interesting. Have read up on it, and they have a product that may work if added to the gas. Good idea..or just drain off/clean plugs/new gas??

    

15Back to top Go down    Re: Old gas/new gas on Sun Aug 10, 2014 4:35 pm

the.postman


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@BooG wrote:..or just drain off/clean plugs/new gas??
That's the way to go.

Put the old stuff in a can at the back of the shed and use for cleaning


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1985 K100 RS 104EA49840092 #0081788 SILVERish (Madison) Prod. date 05/12/84
1984 srx 600
1986 cbr1000f/h
    

16Back to top Go down    Re: Old gas/new gas on Mon Aug 11, 2014 11:58 am

TacKler

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@BooG wrote:But....what do I do with the old gas?

Find a neighbour that you don't like and then late one night use your creative spelling talents to write something witty on their front lawn. That is if you have more than a couple ofblades of grass at the front of your house in yourpiece of London.

Works a treat, especially for words that children should not see.

Speaking with a mate of mine recently in the automotive industry and his comment is that all 91 Octane in Oz has a shelf life of about two weeks and is crap. Hence I use 98 in my bikes.


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17Back to top Go down    Re: Old gas/new gas on Mon Aug 11, 2014 12:18 pm

k-rider

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I have had the old fuel trouble a couple of times after winter storage (some day i will learn ) .
the bike simply would not start unless i used the diesel start , i then aplied the lead substitude i use during the summer , and after draining the fuel rail ,and a few more tries ,bingocheersit started .

worked on the lawn mower too.

k-rider


18Back to top Go down    Re: Old gas/new gas on Mon Aug 11, 2014 11:05 pm

floyd

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Get some of this K-Rider Wink



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1984 K100 Adventure Bike
    

19Back to top Go down    Re: Old gas/new gas on Mon Aug 25, 2014 4:01 pm

BooG

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I sometimes wish I was Australian, just so I can buy products like that!!! Nice!
Anyway.....old gas drained....new gas in just now....starts up but running ruff!! Smoke out back...uneven idle...and knocking still. Should I keep running it (as the remainder old gas passes through the pipes and is burnt off) , or what else is a good idea?

    

20Back to top Go down    Re: Old gas/new gas on Mon Aug 25, 2014 4:50 pm

BooG

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Looks like I am only firing on one or two cylinders at mo. That would explain the smoke and occasional backfire. Would that old gas block up the injectors? Is that the most likely culprit?

    

21Back to top Go down    Re: Old gas/new gas on Tue Aug 26, 2014 1:40 am

RicK G

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I would be cleaning the injectors and new plugs if you haven't already done it. Even cleaning the outside of the coils can be a help, I have seen coils with tracks burned across them come back to life after a good clean.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

22Back to top Go down    Re: Old gas/new gas on Tue Aug 26, 2014 1:57 am

92KK 84WW Olaf


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@BooG wrote:Looks like I am only firing on one or two cylinders at mo. That would explain the smoke and occasional backfire. Would that old gas block up the injectors? Is that the most likely culprit?

Any consistency in which two cylinders are not firing? Just after you try starting up feel the headers and see which ones are cold. If 1 and 4 or 2 and 3 as pairs are cold then you have a coil issue, but maybe a connection and not the coil itself.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 83,150miles
    

23Back to top Go down    Re: Old gas/new gas on Tue Aug 26, 2014 7:35 pm

BooG

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Very Happy Cleaned and gapped the plugs. Cleaned injectors...new gas...sorted!
Thanks for all the helps and advice!

    

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