I have a 2004 F-150 5.4 engine, every time I come to a stop are turn hard it cuts off an its hard to start in the morning, I bought a throttle position sensor, throttle acuator, master air flow sensor

Asked by Nov 30, 2015 at 07:36 PM about the 2004 Ford F-150

Question type: Maintenance & Repair

,cam position sensor, IAC valve an a fuel
filter an its during the same thing, please
help me......

5 Answers

So can u help me

50,755

How many miles on it?

19,810

Has the vehicle been tuned up since 2004? Take it to a place like autozone and see if any codes have been set. Hard cold starting is usually a sign the vehicle may need a tune-up. When the wheel is turned the power steering pump exerts a load on the engine which could cause misfiring engine to stall. Get an HEI spark tester and test each spark plug wire for "fire". They're only about 15 bucks. You certainly have eliminated a lot of causes by throwing parts at it.

6,625

Oj is right, need to know if there are any codes. The evaporative emissions system can also cause a similar set of concerns. If the engine is ingesting fuel vapors at stop or on initial startup it will cause it to stall. I've put a lot of vapor management valves on Fords due to them sticking open intermittently.

50,755

Could be the gummed up cam phaser issue also.

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