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Ok i have 1998 ford f150 and i have a new exhaust job on it

Customer Question
plugs, plug wires coil packs...
Ok i have 1998 ford f150 and i have a new exhaust job on it plugs, plug wires coil packs, egr vavle, pcv vavle throttle postion sensor, fuel filter and air filter still running rough what else is wrong with it
Submitted: 1 year ago.Category: Ford
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Answered in 1 minute by:
3/20/2016
Ford Mechanic: Scott W., Ford Technician replied 1 year ago
Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3,353
Experience: 28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.
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Hello my name is ***** ***** engine do you have?

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Customer reply replied 1 year ago
4. 6
Ford Mechanic: Scott W., Ford Technician replied 1 year ago

Is there any codes stored, misfire codes? Does it feel like a dead miss or really rough idle?

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Customer reply replied 1 year ago
The last time i codes tested it it pulled a few of them bank 1 bank 2 lean combustion egr vale and im pretty sure i fixed those with the new exhaust system and parts and it just runs rough many when its in gear loses power
Ford Mechanic: Scott W., Ford Technician replied 1 year ago

Have you checked the fuel pressure when it loses power?

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Customer reply replied 1 year ago
Havent tested it other than when its running i hit the fuel thang on the motor and it shots fuel out of it
Ford Mechanic: Scott W., Ford Technician replied 1 year ago

Ok I would get a fuel pressure gauge and put on it to make sure it isn't running out of fuel volume.

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Ford Mechanic: Scott W., Ford Technician replied 1 year ago

Does it idle ok?

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Customer reply replied 1 year ago
Maybe a a fuel pump
Ford Mechanic: Scott W., Ford Technician replied 1 year ago

If the pressure goes low under accel with a load on the engine, yes the fuel pump could be failing.

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Customer reply replied 1 year ago
What if it passes got got the test kit heading to test it now but if it passes what else could it be
Ford Mechanic: Scott W., Ford Technician replied 1 year ago

I will give some possible causes for lack of power, give me a few minutes.

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Ford Mechanic: Scott W., Ford Technician replied 1 year ago

Here is our test for lacking power and items to check.

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Ford Mechanic: Scott W., Ford Technician replied 1 year ago

You might do a compression test also to make sure the base engine is ok, valves, springs, piston rings. You should have around 150 psi.

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Scott W.
Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3,353
3,353 Satisfied Customers
Experience: 28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.

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