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need some help with evo

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  #11  
Old 02-22-2011, 06:38 PM
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Originally Posted by houseoutnumbered
I went ahead and rebuilt the carb and glued in the intake with hylomar.
fired the bike up ready to go and the same crap, warms up and stumbles.

started to go through the manifold, the carb gasket looked real good.

I decided to put on a vac pump and check the VOES.
the voes wont hold a vaccum, i can get it to reach 5inches of mercury but it wont stay.
also found the vaccum line to the petcock had a hole.
so my question is this shouldnt the voes hold vaccum, not leak it off.
It will build up to 5-6 inches but then dropes off??????

thanks everyone for the help!
I do appreciate it...
VOES advances the timing. It should hold vacuum. Vacuum leak is probably causing your problem. Someone please correct me if I'm wrong.
 
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  #12  
Old 02-22-2011, 07:53 PM
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if you got a vacuum leak at the petcock it will not flow fuel!
 
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  #13  
Old 02-23-2011, 06:02 AM
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Blob, it wasnt a very big hole at the 90 off the petcock, (but it still was a hole).
the vaccum pump could get the vacuum to 5 and 6 inch mark but would not hold.easy fix under a 100.00 bucks to fix, just have to wait for the parts to ship.
 
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  #14  
Old 02-23-2011, 06:12 AM
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Originally Posted by houseoutnumbered
Blob, it wasnt a very big hole at the 90 off the petcock, (but it still was a hole).
the vaccum pump could get the vacuum to 5 and 6 inch mark but would not hold.easy fix under a 100.00 bucks to fix, just have to wait for the parts to ship.
Any hole in the petcock hose is too much. Change that line.
 
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Old 02-24-2011, 06:38 PM
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If yours is like my 99 EVO, the vacuum line goes to the VOES, and tee's off from there to the fuel valve. So a leak anywhere will cause a loss of vacuum at both of them.
 
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  #16  
Old 03-06-2011, 04:36 AM
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any sort of hole in the vacuum line means that it's not making your voes work properly would be my guess, meaning that it's likely not holding enough vacuum to keep your petcock open.
 
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Old 03-12-2011, 07:24 AM
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I went through the carb cleaned and replaced seals.
the voes was replaced after waiting a week for it to come in at local HD store. (love these guys they always suggest I sell my bike and buy a new tc.)
Still had the idle problem, so after a few barley pops and thinking of that smart a@@ counter guy "you should get a newer bike".
Went through wiring and found the front cylinder plug wire to be bad and coroded socket on the coil.
After a couple more barley pops got it cleaned up and fixed the wire the bike runs pretty dam good.
Thanks everyone for your suggestions.
 
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  #18  
Old 03-12-2011, 07:58 PM
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GLAD you found it!!
 
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Old 03-13-2011, 01:31 AM
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Originally Posted by houseoutnumbered
(love these guys they always suggest I sell my bike and buy a new tc.) so after a few barley pops and thinking of that smart a@@ counter guy "you should get a newer bike".
.
Found some good HD parts guys but many of them are just stroking keyboards to get enough experiance to get a job at Autozone alone trying to give advice

On the non-sarcastic note, glad you found the problem and didn't buy a bike off the showroom floor as suggested
 
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  #20  
Old 03-13-2011, 11:46 AM
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Cool. And thanks for reporting back with the solution. Too many guys come on here, ask a question and then disappear without letting us know what that solution was, even if it did entail buying a new Twinkie... ;-)
 
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