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It could be many things...
If the check engine light is on/comes on, having it scanned is the easiest way to find out, and if no codes you can view fuel/trim, etc. but....
It is usually a problem with the Air/fuel ratio
If no codes are present,
and you have done one recently, I would start with a tune-up
- bad ignition plugs/wires etc can cause this
- Check the fuel pressure, Fuel pump wiring/relay can get corrode(specially here in the northeast).
- When was the fuel filter last changed, a clogged fuel filter can starve the engine of fuel under WOT.
-A faulty EGR valve (stuck open)can cause hesitation/stumbling
- It could be a MAF( mass air sensor) or TPS(throttle position sensor)
- I've had a clogged catalytic converter cause this issue
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoDirty fuel filter. Damaged catalytic converter.
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Will the transmission cause your 99 ford expedition bog down and sputter when accelerating 4.6liter?
will the transmission causes my 1999 ford expedition to bog down & sputter when accelerating the 4.6liter engine.
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