croatianjoe Posted October 28, 2009 Report Share Posted October 28, 2009 RPM needle is acting funny and my car sounds like it wants to stall? When I start my van the RPM needle is moving up and down by itself. It is also doing this when I drive. when I give it gas or when driving it sounds like it wants to stall. Also when I am driving the van feels like it is jerking, when it jerks, that is when it feels like it wants to stall. The van is a 2000 pontiac montana. Any help would be greatly appriciated. Quote Link to comment Share on other sites More sharing options...
dustin_shull Posted October 28, 2009 Report Share Posted October 28, 2009 (edited) 3400 3.4 v6? or is it 3.8 v6? Edited October 28, 2009 by dustin_shull Quote Link to comment Share on other sites More sharing options...
croatianjoe Posted October 29, 2009 Author Report Share Posted October 29, 2009 its a 3.4 Quote Link to comment Share on other sites More sharing options...
OrionStang Posted October 29, 2009 Report Share Posted October 29, 2009 Don't know much about GM, but its gotta be one of the sensors or the computer itself. Fuel mixture is off somehow. Quote SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
dustin_shull Posted October 29, 2009 Report Share Posted October 29, 2009 sounds alot like a vacuum leak, and a fairly large one at that..... Quote Link to comment Share on other sites More sharing options...
OrionStang Posted October 30, 2009 Report Share Posted October 30, 2009 sounds alot like a vacuum leak, and a fairly large one at that..... Could be, if a line comes completly off the fitting or breaks, you'll get the problems you're having. Cheaper to fix than a sensor, too. Quote SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
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