Question about Ford F-150

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The truck is hard to start and the idle is rough. It hesitates during acceleration but runs ok at cruising speeds. it is running very rich.

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It is probably time to replace one or both and in the case of some Ford's four Oxygen sensors.

Posted on Apr 10, 2011

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1995 GMC Safari Loses Power when accelerating hard, rough idle


Do you have a check engine light on? Is this a 4.3 with central port injection? If it's running real rich it might have a fuel leak inside the intake, either a fuel pressure regulator leaking or a feed line to the injector.

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Jun 11, 2009 | 2000 Ford F150 Flareside SuperCab

1 Answer

Hesitates on acceleration


Does the car always hesitate during acceleration? If it ALWAYS struggles when it starts or ALWAYS hesitates on acceleration then I would say the issue is fuel delivery. If the problems are more intermittent and come-and-go then it could be an electrical issue.

I would start by changing the fuel filter. Changing plugs, wires, cap, and rotor are all good things to do as your budget will allow. I doubt you will have to change your injectors.

If you end up replacing any rubber fuel line, be sure to use the high-pressure stuff made for use on fuel injected cars.

I hope this helps! -Nick

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2005 Jeep wrangler w/rough idle and hesitates when you accelerate


try fuel injectors....run a bottle or two with full tank through it and see if that dont solve the problemo.....

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4.9 liter will idle but wont accelerate have to start with ether


yes checked fuel pressure and replaced the fuel filter, checked the mapp sensor,tested throttle position sensor, has strong spark, 50psi fuel pressure, fresh tune up, runs real rich and rough idle but wont rev up like fuel injectors arent speeding up, also checked exhaust. thanks julius

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