I really need some help. I have a Mazda 6i Touring 2009 (2.5L, 4Cyl.) with an engine failure. I don\u2019t have any power. When I press on the gas, the revs go up but the car is slow to accelerate, hesitates and I get a CEL. So, I connected the car to an OBDII reader and got these two codes; P0403 and P2188.<\/p>\n
I then went to my mechanic (I live in the Dominican Republic) and had the vehicle tuned-up. I did an oil change, spark plugs change (The 2 in the middle were black, burned. The other 2 were OK) and a radiator flush. The car was still having the same problem so we decided to clean the MAF sensor, the throttle body and the EGR valve. Also, the air filter is OK.<\/p>\n
After putting everything back in place, he also checked for a vacuum leak but didn\u2019t find any.<\/p>\n
we went for a ride and at first, it seemed a little bit better but after the car got warmer, same problem\u2026 I connected the car again and we got 3 more codes; P061B, P0300 and P2187. He deleted the EGR valve and we went for a ride to see if it was the problem but it felt the same.<\/p>\n
He then decided to go for the injectors.<\/p>\n
After listening to the injectors, he found that the two in the middle are pulsating a lot faster than the other two on each side. So, this is probably why the system is too rich…<\/p>\n
My mechanic connected a system to clean the injectors, took the rail out and tested them and said they were working fine, they are not clogged and have no leaks. He then switched the injectors to make sure. He put the 2 in the middle at the extremities and vice-versa. Same thing, the two in the middle were pulsating a lot faster than the other two even after being changed. So, this proved that the problem is not the injectors.<\/p>\n
He took the new spark plugs out to check and the two in the middle were black burned while the other two were perfect. He also switched the coils just to see and the problem remains.<\/p>\n
He doesn\u2019t know what else to try\u2026<\/p>\n
I\u2019m lost, I really need help. I love this car and I just want it to run perfectly.<\/p>\n
Even bought another PCM and programmed it to see if that was the problem but no, it does the same with the other PCM connected.<\/p>\n
And same codes come out. Here with a freeze frame:<\/p>\n
Confirmed Trouble Codes
\nP0300: Random\/Multiple Cylinder Misfire Detected (Powertrain, Generic)
\nP0403: Exhaust Gas Recirculation “A” Control Circuit (Powertrain, Generic)
\nP2188: System Too Rich at Idle (Bank 1) (Powertrain, Generic)<\/p>\n
Pending Trouble Codes
\nP0300: Random\/Multiple Cylinder Misfire Detected (Powertrain, Generic)
\nP0403: Exhaust Gas Recirculation “A” Control Circuit (Powertrain, Generic)
\nP2178: System Too Rich Off Idle (Bank 1) (Powertrain, Generic)
\nP2188: System Too Rich at Idle (Bank 1) (Powertrain, Generic)<\/p>\n
Permanent Trouble Codes
\n-none<\/p>\n
Freeze Frame
\nP0300: Random\/Multiple Cylinder Misfire Detected (Powertrain, Generic)
\nFuel system status: Fuel system 1: Open loop (2)
\nFuel system status: Fuel system 2: NA
\nCalculated engine load: 72.9 %
\nEngine Coolant Temperature: 82 \u00b0C
\nShort Term Fuel Trim – Bank 1: 0.0 %
\nLong Term Fuel Trim – Bank 1: 0.0 %
\nIntake Manifold Absolute Pressure: 79.0 kPa
\nEngine RPM: 3297 RPM
\nVehicle Speed Sensor: 108 km\/h
\nIgnition Timing Advance for #1 Cylinder: 28.0
\nIntake Air Temperature: 34 \u00b0C
\nAir Flow Rate from Mass Flow Sensor: 51.34 g\/s
\nAbsolute Throttle Position: 30.2 %
\nTime Since Engine Start: 749 s
\nCommanded EGR: 0.0 %
\nCommanded Evaporative Purge: 0.0 %
\nFuel Level Input: 40.0 %
\nNumber of warm-ups since DTCs cleared: 0
\nDistance traveled since DTCs cleared: 15 km
\nEvap System Vapor Pressure: 7.3 Pa
\nBarometric Pressure: 101 kPa
\nCatalyst Temperature Bank 1, Sensor 1: 858 \u00b0C
\nControl module voltage: 13.45 V
\nAbsolute Load Value: 65.1 %
\nFuel\/Air Commanded Equivalence Ratio: 1.000
\nRelative Throttle Position: 20.8 %
\nAmbient Air Temperature: 33 \u00b0C
\nAbsolute Throttle Position B: 30.2 %
\nAccelerator Pedal Position D: 33.7 %
\nAccelerator Pedal Position E: 16.9 %
\nCommanded Throttle Actuator Control: 25.1 %<\/p>\n
Why are only those 2 middle injectors receiving a signal to squirt more gas than the other two? What is going on?<\/p>\n
What could be the problem???<\/p>\n","protected":false},"excerpt":{"rendered":"