gordonowusu
18-07-2015, 11:45 AM
Hello Guys,
I Have been having troubles with my 2008 B7 2.0T. Noticed my car idles very rough when I start for the first time i.e cold start, the engine will vibrate very bad as if it is running only on 2 cylinders. the check engine light will start flashing for about 10 seconds before it stays solid. but after 2 minutes it will be back to normal and run fine until another cold start start. I scanned and had the following codes.
1. coolant temperature sensor - Sporadic
2. Rear heater core
I have replaced the coolant temperature sensor at rear of engine. Replaced spark plugs with new ones. replaced all 4 coils with brand new. this has made no difference. the problem is still there.
I unplugged the MAF before starting the car this morning. the engine idled fine without blinking check engine light. the vibration/misfire was gone. I waited for the engine to cool and i plugged back the MAF. the problem was back. took it off again and waited for the engine to cool. started it and there was no misfire or vibration.
I drove the car for about 10 minutes and was ok but just a slight change in engine sound probably due to the ECU running on default values due to the unplugged MAF.
I want to replace the MAF but I want to be sure before spending another cash without solving the problem. Am sure the MAF may be faulty since the rough idle vanished when I unplugged it.
I need your advice before making the next move by replacing the MAF.
Thanks,
Gordon.
I Have been having troubles with my 2008 B7 2.0T. Noticed my car idles very rough when I start for the first time i.e cold start, the engine will vibrate very bad as if it is running only on 2 cylinders. the check engine light will start flashing for about 10 seconds before it stays solid. but after 2 minutes it will be back to normal and run fine until another cold start start. I scanned and had the following codes.
1. coolant temperature sensor - Sporadic
2. Rear heater core
I have replaced the coolant temperature sensor at rear of engine. Replaced spark plugs with new ones. replaced all 4 coils with brand new. this has made no difference. the problem is still there.
I unplugged the MAF before starting the car this morning. the engine idled fine without blinking check engine light. the vibration/misfire was gone. I waited for the engine to cool and i plugged back the MAF. the problem was back. took it off again and waited for the engine to cool. started it and there was no misfire or vibration.
I drove the car for about 10 minutes and was ok but just a slight change in engine sound probably due to the ECU running on default values due to the unplugged MAF.
I want to replace the MAF but I want to be sure before spending another cash without solving the problem. Am sure the MAF may be faulty since the rough idle vanished when I unplugged it.
I need your advice before making the next move by replacing the MAF.
Thanks,
Gordon.