Sensors ? / 11.5 Mpg avg City.
#1
03-14-2017, 06:49 AM
Sensors ? / 11.5 Mpg avg City.
First off pardon me if I have posted this in wrong section
but seemed like the right place.
My avg mpg is 11.5 in city..per overhead console readout.
Prior to engine replace I was averaging 14-16.
All new tune up parts installed on replacement engine..Plugs, Plug wires.
Cap, Rotor. Ignition coil etc...
The only code on a scan is P0420, a O2 sensor or exhaust leak.
Which was there before engine swap.
What on the replacement engine could be causing the decrease
in mpg and not throwing a error code ??
but seemed like the right place.
My avg mpg is 11.5 in city..per overhead console readout.
Prior to engine replace I was averaging 14-16.
All new tune up parts installed on replacement engine..Plugs, Plug wires.
Cap, Rotor. Ignition coil etc...
The only code on a scan is P0420, a O2 sensor or exhaust leak.
Which was there before engine swap.
What on the replacement engine could be causing the decrease
in mpg and not throwing a error code ??
#2
03-14-2017, 09:24 AM
p0420 is for convertor efficiency. Aka rear o2 is telling the ecm the convertor isnt burning as it should. Sometimes it can be clogged or,or just dirty enough to throw a code. Does it seem like your holding back at all?
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