7mpg after motor swap???
03-25-2014, 04:22 PM
#11
Senior Member
It's an STX, which means it's got the 4.6L.
03-25-2014, 04:54 PM
#12
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I have the 4.6 v8 they guy before me cut off one cat so when we did motor we just by passed both.. so I have front o2 sensors, no rear and no cats. All tires are at 40 psi, brake isn't locked up or dragging..
03-25-2014, 05:10 PM
#15
Senior Member
It should coast pretty well, shouldn't slow quickly.
If you have a CEL on, it's running in closed loop on preset parameters, barring the computer from making adjustments. That alone will give you bad MPG.
If you have a CEL on, it's running in closed loop on preset parameters, barring the computer from making adjustments. That alone will give you bad MPG.
03-25-2014, 06:52 PM
#17
Senior Member
CEL=Engine light.
It's on, and it's a warning to the operator that all is not right with the engine. When it's on, MPG are going to go into the tank.
It's on, and it's a warning to the operator that all is not right with the engine. When it's on, MPG are going to go into the tank.
03-25-2014, 07:38 PM
#19
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Without a scanner you can't tell. It can be for literally hundreds of faults. If you don't have a code scanner, take it to Autozone and have the codes scanned.
03-25-2014, 07:42 PM
#20
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My buddy who helped with the motor swap does. I just scanned it.. it threw 12 codes. So glad you said something or I wouldn't have thought of it.. here's the codes: I know 2 were about o2 sensor , and camshaft position sensor.. don't know the rest...
P0054
P0060
P0141
P0158
P0161
P0340
P0401
P2270
P2272
P2273
P0141
P0161
P0054
P0060
P0141
P0158
P0161
P0340
P0401
P2270
P2272
P2273
P0141
P0161
Last edited by snubs.ford; 03-25-2014 at 07:44 PM.