steeve Posted February 25, 2017 Share Posted February 25, 2017 I have Winnebago 1991 with V6. The engine block and egr valve have only 20,000. Sometimes when I drive or at idle the engine have some ''hiccup'' for a fraction of second the fire or gas missing. Many causes can make this. Anybody have an idea? Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted February 28, 2017 Share Posted February 28, 2017 first thought is a small vacuum leak. I assume it runs better underway. Quote Link to comment Share on other sites More sharing options...
steeve Posted March 1, 2017 Author Share Posted March 1, 2017 It's happen randomly, when i drive on Highway or idle. Somes times it was ok for 1hour or 1/2 hour. It run very well for the rest of the time. Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted March 2, 2017 Share Posted March 2, 2017 curious, that many years. that few miles: is the gasoline old? Maybe running some gas thru it (3 tanks?) might help. Quote Link to comment Share on other sites More sharing options...
steeve Posted March 3, 2017 Author Share Posted March 3, 2017 Gas filter has been changed 4 year ago and i change it again, same result. Quote Link to comment Share on other sites More sharing options...
DanAatTheCape Posted March 8, 2017 Share Posted March 8, 2017 I was talking about changing the gas, not the gas filter Quote Link to comment Share on other sites More sharing options...
steeve Posted March 11, 2017 Author Share Posted March 11, 2017 My motorhome is in the storage right now and i have to wait on april for the road test. Thanks for your feedbacks. Quote Link to comment Share on other sites More sharing options...
steeve Posted July 8, 2017 Author Share Posted July 8, 2017 Since 2 month ,i drove my motorhome, i have the same problem. I replace my sparks plug, rotor, cap, wires with my olds ones. I check my vacuum hoses, air intake hose, no cracks. Quote Link to comment Share on other sites More sharing options...
Derek up North Posted July 8, 2017 Share Posted July 8, 2017 And no 'Check Engine' light? Quote Link to comment Share on other sites More sharing options...
Nam Posted July 8, 2017 Share Posted July 8, 2017 Check all the F.I. plugs too. Also MAF sensor plug. Make sure there is no crack or leaky vacuum hoses. This could be hard to pin point. Mine does hick up occasionally when the gas tank is low and I am driving over a slope or up hill. Quote Link to comment Share on other sites More sharing options...
steeve Posted July 8, 2017 Author Share Posted July 8, 2017 no code Quote Link to comment Share on other sites More sharing options...
steeve Posted July 10, 2017 Author Share Posted July 10, 2017 Finally, i thing than i find my problem, I swap my air flow meter with one at the scrap yard. After an 1-1/2 hour road test, no hiccup. I am very happy. Quote Link to comment Share on other sites More sharing options...
Derek up North Posted July 11, 2017 Share Posted July 11, 2017 Good news. I'm surprised you found one in the scrapyard. They've all been crushed long ago near me. Quote Link to comment Share on other sites More sharing options...
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