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Old November 6th, 2019, 03:14 PM
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Jrp79 Jrp79 is offline

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Default 99 f250 5.4 p1131

99 f250 5.4 with a 03 pi 5.4 engine swap.idles good drives good if driving normal.if i accelerate more then 1/2 throttle driving or idle it skips. Only code is p1131.
Someone put warn hubs so i removed the vac lines from the canister to the wheels.replaced all connections that were bad.all lines are hooked up.ac and heat blows out of any vent i select.gas cap looks good, oil dipstick and cap are tight. No holes in the air intake tube. Im stumped on what to check next.
Oem ford cops,new oem platinum plugs.
Old November 6th, 2019, 04:27 PM
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My ff data
Fuel system 1......cl-fault
Fuel system 2......cl-fault
Cal load.........81.96
Stft b1.....5.47
Ltft b1.....5.47
Stft b2......5.47
Ltft b2......5.47
Eng rpm...2202
Veh speed....22

Not sure if any one can tell me by reading that data whats going on
Old November 6th, 2019, 07:56 PM
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You have more stuff to check. There's a lot more things other than a vacuum leak that can trip that code.



2003 F-150 XL RCSB 2wd 4.2 5 speed 3.55 LS
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harrison28 (November 7th, 2019)
Old November 6th, 2019, 08:48 PM
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Does any one have the specs on how to test the maf with a volt meter(how to and what readings should be)

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