Vapour lock?? in 77 C30 motorhome

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  #1  
Old 08-05-04, 07:18 PM
mrjym
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Vapour lock?? in 77 C30 motorhome

I need help with a problem of which i beleive is vapour lock in my motorhome. In hot weather it has no power on the hills, ie: missing, bucking, stuttering and eventually stalling. on the flat it is A-ok and if it is reletivley cold it will climb the hill just fine as long as it isn't a long climb. Before i completely tear everything apart it would be nice if soeone had some hints as to where to start first. thanx Jim
 
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  #2  
Old 08-09-04, 09:49 AM
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Join Date: Dec 2001
Posts: 2,538
start by changing fuel filters will likely have one inline and may have one at the carb depending on which type of carb it has.
after doing the above and if the problem still is occuring you will need to find a way to check fuel pressure by teeing into the fuel line and installing a fuel pressure guage so you can whatch it when the problem occurs if it is losing pressure you are likely looking at bad fuel pump or restricted strainer in tank.
if you are not losing fuel pressure and you believe it is fuel related then I would recomend rebuilding the carb.
 
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