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you should test the tps. it's position has everything to do with how it operates. It's circuits include the closed throttle fuel cut. also read this http://board.marlincrawler.com/index.php?topic=35469.0This solved the problem with my truck. when I pressed the brake, the idle cut would engage and the rpms would drop. once it got to about 1000 rpm it would get power again and speed back up. sounded kinda like someone impatient at a light trying to let someone know he's getting.... vroooom......vroooom......vroooom......vroooom.p.s. also, this never stored any codes on mine.
Hey, this is exactly what mine is doing. vroooom......vroooom......vroooom......vroooom But only when the brakes are on. Other than that the idle is just too high...
The ECU will cut fuel if the TPS indicates that the throttle is at idle, the brakes are on, and the rpms are above a certain speed. Fuel is cut until a lower rpm is reached. So if your idle speed is to high, you get stuck in a loop of fuel off, fuel on, fuel off......
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