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Old 04-11-2010, 11:15 AM   #1
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Intermittant P1174 - Fuel Trim Cylinder Balance

I've been having this problem for a while. Engine will throw the P1174 code, then it'll disappear for a day, throw it again, a couple times, and then it'll just disappear for several weeks.

Mechanic thought it was plugged injectors, so I ran 94 Octane and $40 worth of injector cleaner for the next while. It cleared it up for a couple weeks, and now its back... Any ideas?

06 Spring Edition 2.4L w/ <50,000 miles
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Old 09-06-2010, 01:42 AM   #2
 
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I changed the Intake & Exhaust solenoids about a week ago which took care of the CEL and TCL problem I had.

For the past 2-3 days, I'm now having to exact same problem as rotaryboy23 describes in his message. So, I'm wondering if anyone got a permanent solution for this.

Thanks for any input/help!
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Old 09-06-2010, 01:53 AM   #3
 
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Quote:
Originally Posted by kaspar View Post
I changed the Intake & Exhaust solenoids about a week ago which took care of the CEL and TCL problem I had.

For the past 2-3 days, I'm now having to exact same problem as rotaryboy23 describes in his message. So, I'm wondering if anyone got a permanent solution for this.

Thanks for any input/help!
By the way, below are the readings from the freeze frame (in case this might be helpful):

DTC for which Freeze Frame was Stored P1174
Fuel System 1 Status Closed Loop
Fuel System 2 Status Not Supported
Calculated LOAD Value 33.73 %
Engine Coolant Temp 190.40 °F
Short Term Fuel Trim - Bank 1 0.78 %
Long Term Fuel Trim - Bank 1 8.59 %
Intake Manifold Absolute Pressure 17.17 inHg
Engine RPM 2,280.00 rpm
Vehicle Speed Sensor 62.76 mph
Ignition Timing Advance #1 Cylinder 37.50 °
Intake Air Temperature 75.20 °F
Air Flow Rate Mass Air Flow Sensor 2.42 lb/min
Absolute Throttle Position 34.51 %
Time Since Engine Start 694 sec
Commanded Evaporative Purge 74.51 %
Fuel Level Input 71.37 %
Evap System Vapor Pressure -28.71 inH20
Barometric Pressure 29.31 inHg
Catalyst Temperature Bank 1 - Sensor 1 1,414.40 °F
Control Module Voltage 14.37 V
Absolute Load Value 33.73 %
Commanded Equivalence Ratio 1.00
Relative Throttle Position 23.92 %
Ambient Air Temperature 73.40 °F
Absolute Throttle Position B 34.90 %
Accelerator Pedal Position D 19.61 %
Accelerator Pedal Position E 9.80 %
Commanded Throttle Actuator 30.59 %
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Old 09-06-2010, 10:54 AM   #4
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Bad fuel Injectors? I had the same code, during 6 months. I tried to swap coils, change spark plugs...I just replaced the 2 & 3 Injectors, and no issues again! BTW, fuel injectors cleaners won´t solve anything related to this code or P0300, P0301....
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