Question about 1996 Ford F150 Regular Cab

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Lack of power on 94 rv with 460 engine

I just replace the fuel pump and fuel filter 650 miles ago and is doing the same lack of power ..it works ok in idle but trying to go up hill or a little faster it won't work I check the fuel pressure and is 32 psi

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Check the timing chain for slop

Posted on Apr 19, 2009

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How do i find out what is causing such a lack of power when going up hill,its so bad that down shifting is the only way to maintain road speed...?


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Ford based RV - 460 cc - possible fuel issues?


I'm not familiar with the vehicle (I write from the UK..) but yes sir, I would agree with you that it does sound like hot engine/fuel issues. Or maybe a 'cold start' injector, assuming it is a petrol engine.

I also agree that you don't throw money at it.

Personally, I would change the fuel filter (and air filter) anyway, it's the easiest and cheapest option.

You don't mention any problems when the vehicle is running, so I presume that when it is actually travelling, all is fine? If you had intermittent problems with the fuel pump I would have imagined that your vehicle would stall and splutter from time to time. Plus, at the low mileage you have done - a fuel pump shouldn't be failing or have problems.

I would change the fuel filter (and air filter if necessary) and also pour a can of 'injector cleaner' into the fuel tank as a 'lazy' or gummed-up injector(s) can cause starting problems - and take the vehicle for a nice fast run to 'try and clear things'.

Do the simple things first. The things YOU can do. With low mileage vehicles a 'glaze' can build up in the fuel system simply because the vehicle is low mileage /short runs. This causes injectors to become 'clogged and sticky'. Run it with additives in the fuel system ...

If all else fails, ask a workshop. But .. it sounds as though your vehicle is reliable apart from the starting-niggle. I don't think you have a big problem.

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Check your running fuel pump pressure. If (as I suspect) it's too low, first try changing your fuel filter. After changing the filter, recheck the running fuel pump pressure. If still low, check you fuel pump pressure regulator. If OK, you may need a new fuel pump.

Also probably would be a good idea to replace you air filter.

Good luck!

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