Question Asked: what will make my 99 e350/v8 run poorly after it warms up?
Marc on 1999 Ford E-350

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Runs good for about 10 minutes, then starts misfire
(1) Answer
sounds like you may have a intake problem, i have seen this happen several times, when the engine gets hot or warm the intake maybe warping and sucking too much air,try spraying carb cleaner,break cleaner, or some sort of flammable spay and spray around the intake area when vehicle is acting up and if the rpm's increase then you can locate the problem.Hope this helps if you have anymore questions please email me, Rick at
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