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Re: 2010 Saab 9-3X P0606 ECM/PCM Processor, P0300 Random Misfire Detected
Posted by bigdave [Email] (more from bigdave) on Sat, 12 Jan 2019 03:56:12
In Reply to: 2010 Saab 9-3X P0606 ECM/PCM Processor, P0300 Random Misfire Detected, bigdave, Sat, 22 Dec 2018 16:13:06
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Okay folks, it’s back to the drawing board. I replaced the T8 with a newly, unit and the same problem remains. I’ll review in case that gives anyone any bright ideas.
2010 Saab 9-3X SportCombi
I replaced the catalytic converter with a new Saab unit.
Drove the car back on the highway for probably 10 miles with no problems.
A couple of days later, I went out to run an errand and accelerating on to the highway, l heard what seemed like a backfire and lost power.
I limped off the highway and to an AutoZone and the two codes that showed up were P0606 (ECM/PCM Processor) and P0300 (Random Misfire Detected).
I then patched together some troubleshooting.
I started with the Mass Airflow Sensor, took it apart, cleaned that and re-installed. No change.
I then replaced the spark plugs as a simple fix. No change.
I then tested the ignition coils to see if any were bad. No change.
After all of that I addressed the T8, replaced it with another unit with updated software for my car.
Same basic problem...I rev the car up to between 3,000 and 4,000 RPMs and it won’t hold. It simply drops off and then catches again.
I’ve been worried that it’s a turbo problem, but It does not have the telltale sound of a turbo problem. Alternatively I feel like I have some sort of vacuum leak somewhere that causes the power to let go. I would think this is potentially from my cat replacement, but I’ve checked all of the connections that were disconnected and they’re all snug.
That’s a long story that I hope will spark an idea for where I might investigated next. Many thanks in advance.
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