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hey, i have an 89 f-150 with a 300 inline...when i first start it up and let it idle for a little bit..it starts to idle rough it jumps from like 1100 to 400 and i really annoys me cause i cant figure out the problem...ive heard rumors that it could be a bad O2 sensor but im not sure
Have you changed you fuel filter recently? Sounds kinda like the fuel pump is having trouble building enough pressure to start and run during its 2 second prime.
How about your brake booster? Mine idles rough too, and I know I need to replace it. If you pull off the vacuum line to it and plug it, see if it smooths out.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
