My Nissan X Fail has been playing up, as previously mentioned, so as it was Saturday I tried to do something about it.
The p0488 error code points to the egr valve being at fault, possibly dirty. Looking for a quick fix, I had ordered up Wynns EGR cleaner aerosol a couple of days ago.
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One second bursts into the air intake until the can is empty.
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But what's this? Oil on the air filter FFS. Google tells me there's a problem with the oil separator.
A quick test drive after the egr cleaner suggested the snake oil was a waste of time and money. Still down on power and not wanting to rev above 3000 rpm. Same error code returned as well.
Decided to take EGR off and clean it properly.
It is located at the front of the engine but access to some of the bolts was hellish.
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Had to remove hoses and clips and the oil filler tube and other sundries to get to the bolts holding the egr on.
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Finally after much swearing the valve was off.
I was expecting to find it full of carbon deposits and black soot.
Not this wet gunge!
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Could this be the Wynn's cleaner?
Underneath the sludge the valve was caked in carbon.
Lots of scrubbing later.
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And started the old 'refitting is the reverse of removal' scutter.
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Gloves were a partial success
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So did I fix it?
No, i didn't
Not only is it still drive as badly as before, I now have a couple more errors to keep the original one company!
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I'll get the voltmeter out tomorrow and test some of the sensors.