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Slightly random popping when pulling to a stop when cold outside

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So it's weird. I will drive and get the engine up to temperature. I will idle at a stop light and about 15 seconds later a slight pop occurs. Then a couple seconds later another pop. The pops are of different volume and seem to come from different places in or outside the car. I can't duplicate it when I pull into my garage to listen. Any clue?? Seems to only be present when the temp is below 50F or only time that I noticed?

Engine and exhaust are good. Plugs are new, just changed. Could are good. No misfiring. Doesn't sound like a misfire and is random and seems to possibly be cold contraction of body panels?

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  • 2 months later...

Hello I have a 2000, 996 with 127,000 miles on it, and I hear that popping sound as well. I never got a cel light too, and it sounds like it comes from all different sides. I also have a 1998, 986 with similiar miles but I never hear a popping sound in that one. I guess it only comes from 996s, if I was you I would not be to worried about it as long as your engine or suspension is not the cause of the sound. My reasoning from that judgement is, it has made that sound in my vehicle since I bought it at 89,000 in 2012. I have had many services completed on it and the popping sound is still there and will do it randomnly and sound will very as well.

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  • 3 weeks later...

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