Quote:
Originally Posted by sfkjeld
As described below, I’ve had a 1341 CEL issue for over a year. Exhaust cam timing. The interesting part is that the car always runs great. And if the CEL is fully cleared with the Porsche Durametric scanner, it will pass CA smog (I’ve done it twice).
I put in a low temp thermostat a few months ago. The car def runs cooler unless in traffic on a hot day. Then it runs as it had with the stock 185 thermostat.
But it appears running cooler seems to effect the 1341 CEL. I have a cheap scanner and periodically clear the CEL when I annoys me. With the lower temps tho, the CEL isn’t thrown so quickly. I can go weeks now and it was days before. But now, if I leave the CEL on, the computer clears it once in a while. I assume it’s because the vario cam works better with a cooler motor? Anyway, weird.
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Just hypothetically, if the O-rings inside the variocam are worn out/broken and they no longer can hold the pressure as they are supposed to, they can leak more when the oil is hotter and thus thinner, leading to more frequent triggering of the CEL. So it does not work better in a cooler motor, just it`s more likely to fail when it`s at normal operating temperature. Assuming this to be correct, thicker oil would give you even less frequent CEL.
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