Question about 2003 Ford F150 Regular Cab

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5.4 triton. starts up rough 3 out of 5 times. did

5.4 triton. starts up rough 3 out of 5 times. did the coils and plugs aready. Rough idle. Engine has 135000 on it. What else can it be

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I would check the fuel filter. They should be replaced every 20,000 miles. Also check the air filter. You could also do a fuel pressure check.

Posted on May 12, 2010

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Posted on Jan 02, 2017

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