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Changed fuel pump also new intake manifold now it hesistats when driven but when idle its runs fine

Vehicle: 03 ford E250

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Idles fine? Thats good. when the engine hesitates under load you have a misfire condition. such as a ignition coil sparkplug boot seeking ground.

 Here is a ignition coil boot, when the ignition coil boot wears out , it causes misfire under load.

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asked Sep 17, 2018 by

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