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Arturo08

Blaine, WA

2003 f-150 xl ext. cab. my work truck for my company. L. A. Pride Finishing(construction)current mileage:300,000 kil. location; kincolith, british columbia, canada


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Question Asked: 

I bought some fuel that had water in it a few weeks back... after cycling out the bad stuff, changing the fuel filter, the spark plugs and the ignition coils.. the truck is still missing in the #2 cylinder. I had 2 second opinions as well as mine... there is n knocking, she still missing. we figured maybe the fuel injector, so I changed it. still missing. I am going in for a diagnostic run on Wednesday as the only local diagnostic machine is down till then, how ever both my mechanic buddies and I are all kinda stumped. I am thnkin it might be the contact to the ignition coil. I should find out for after the diagnostic, but just curious what your thought's on it might be.


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Question Asked: 

i have pin hole in exhaust manifold, need to replace('03 f-150). should i replace with stock manifold or upgrade to header type? what's ur opinion.


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Question Answered: 

if you trust your mechanic, follow his/her advice. preventative maintainance for future reference is key to happy vehicle.


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Question Answered: 

tune up. fresh spark plugs(premium). check air intake, and exhaust system(cat/converters could be clogged). clean fuel system. amount of ethanol used in modern gas will clog fuel injectors if not cleaned(fuel additive: ethanol treatment) regularly(any vehicle). do system diagnostics.


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Question Answered: 

try e-3 spark plugs. could be fuel/air mix issue. check cat/converters, and air intake. clean the fuel injectors. these could clog with the amount of ethanol used in the modern fuels.


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Question Answered: 

check all pully's run off the serp. belt. had simular prob.(2003 f-150, 300,000 kil.) turned out to be tensionner arm and the steering pump. replaced both, prob. solved.


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Question Answered: 

if 4 by 4, could by c/v joint. could also be warped disks or a binding caliper. if so suggest upgrade of disks to drilled and slotted. you get better heat dissipation. this will allow you to pack heavier loads with out over stressing the breaks. they last longer. if you do one side you have to do the other.


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Question Answered: 

upgrade air intake and exhaust. could be the engine is not breathing properly. may want to reprogram the engine after also.


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Question Answered: 

why would you want to change it? what are your problems?


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Question Answered: 

check rear diff?


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Question Answered: 

upgrade air intake to a high flow air intake(k&n) or a cold air intake system. this will give a slight boost as the engine will breath easier. added value of never having to replace the air filter(just clean it). check exhaust for clogged cat/converter. upgrade exhaust.


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Question Answered: 

f-150 models prior to 2003 had a shorter thread count for spark plugs required. this design flaw made them brittle causing breakage. in 2003 ford addressed the problem by redesigning for a longer thread count spark plug. the never seize recommendation is a good rule of thumb. just be gentle on removal of old plugs. you may also notice excessive wear on spark plugs and coil boots on the left bank. this is due to exhaust configuration. recommend upgrade to dual exhaust system to balance exhaust flow. you get better sound and increased torque from third to fifth gear.


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