Mazda6 :: 2009 - Revs Go Up But Car Is Slow To Accelerate When Press On Gas
May 31, 2014
I have a Mazda 6i Touring 2009 (2.5L, 4Cyl.) with an engine failure. I don’t 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.
I then went to my mechanic 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.
After putting everything back in place, he also checked for a vacuum leak but didn’t find any.
We went for a ride and at first, it seemed a little bit better but after the car got warmer, same problem… 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.
He then decided to go for the injectors. 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...
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.
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.
He doesn’t know what else to try… 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.
And same codes come out. Here with a freeze frame:
Confirmed Trouble Codes
P0300: Random/Multiple Cylinder Misfire Detected (Powertrain, Generic)
P0403: Exhaust Gas Recirculation "A" Control Circuit (Powertrain, Generic)
P2188: System Too Rich at Idle (Bank 1) (Powertrain, Generic)
[Code] ....
And just found out that the oil smells like gas .... Why are only those 2 middle injectors receiving a signal to squirt more gas than the other two? What is going on? What could be the problem???
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