Hi Kevin;
Your OBD codes are P0301, P0302, P0303
When you put in new plugs and wires did you also put in (2) new coil packs?
Common Problems that Trigger P0301-P0302-P0303
Incorrect Ignition Timing
Vacuum Leak(s)
Low or Weak Fuel Pressure
Improperly functioning EGR System
Defective Mass Air Flow Sensor
Defective Crankshaft and/or Camshaft Sensor
Defective Throttle Position Sensor
Mechanical Engine Problems i.E Low Compression, Leaking Head Gasket or Valve Problems
Polluting Gases Expelled:
HC’S †Hydrocarbons -> unburned droplets of raw fuel that smell, effect breathing and color the sky
CO †Carbon Monoxide -> partially burned fuel that is an odorless but deadly poisonous gas
NOX †Oxides of Nitrogen -> gases that contribute to the creation of smog.
127,000 miles is pretty low so I would tend to eliminate the following from the common problems in this order:
(1) Leaking Head Gasket, Low Compression, or Valve Problems.
(2) DefectiveThrottle Position Sensor
(3) Defective Crankshaft and/or Camshaft Sensor
(4) Low or Weak Fuel Pressure
I would check the following in this order:
(1) Incorrect Ignition Timing
(2) Improperly functioning EGR System
**(Hint) a bad DPFE Sensor (Delta Pressure Feedback EGR) are known to toast up and effect the EGR System.
(3) Defective Mass Air Flow Sensor.
I have a feeling that it is the "D.P.F.E." Sensor causing a Improperly functioning EGR System.
The little S.O.B's are very well known to toast up.
If it were me I would fiddle with the D.P.F.E. First.
D.P.F.E.'S explained:
If you have a "Junk Yard" or Auto Salvage near you I would poke around one and see if you can find another D.P.F.E. Sensor for short or zero money, they are a small and made of plastic. Grab a "Mass Air Flow" Sensor for giggles too.
The M.A.F. Sensor is in your air flow system leading to your air filter box. It will say "Max Air Flow" right on it.
You are looking for a "D.P.F.E -4 Sensor"
Exact part numbers are any of the following:
YF1E-9J460AC
YF1E-9J460AD
2F1E-9J460AB
4U7E-9J460AA
They are around $40.00 from the dealer.
Get a good quality D.P.F.E. Sensor - The cheapo's will give you headaches.
I hope the information helped.
Good Luck;
Wednesday, November 1st, 2017 AT 8:41 PM
(Merged)