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Have a 1986 Itasca Sunflyer with a 454 CID and THM 400. When pulling a hill and warm ambient temps, engine surges, loses power. Have added auxillary fuel pump on frame to feed mechanical pump. Also have checked vacuum lines, fuel filter. Tried spraying carb spray into carb when surging occured - no change. Is vapor lock causing my problem? Noticed that after RV has sat overnight, fill gas tank and take off down the road, no surging happens for 2-3 hours even pullng hills. When it starts acting up. Also blew out left side exhaust seal at manifold. When this happened, no surging but started again the next day with no repairs to exhaust. Has anyone seen this??
Thanks, Gene |
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