993 TT sounding louder on startup. Opinions please
#1
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My 1996 993TT w/ 23000 miles is sounding a bit louder on startup. Nothing major, just a bit more initial rumble. It doesn't sound like the ticking sound of premature valve guide wear or a car needing a valve adjustment, but rather more like a throaty exhaust sound.
I bought the car with 8K miles a year and a half ago....and had Protomotive put in Garrett Hybrid turbos and remap. Between 1996 and 2004 the car mostly sat in the garage of the person I bought it from (next to a couple of Ferraris and
The car is running fine. It is a bit colder these days in my area. Could that explain this?
Harry
I bought the car with 8K miles a year and a half ago....and had Protomotive put in Garrett Hybrid turbos and remap. Between 1996 and 2004 the car mostly sat in the garage of the person I bought it from (next to a couple of Ferraris and
The car is running fine. It is a bit colder these days in my area. Could that explain this?
Harry
#2
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There's an air injection system that runs for 2 minutes on a cold start. According to the service info manual this system runs on cold starts at between -12 and 60 degrees C ambient. It hasn't got to -12 C yet I presume?!
I seem to remember my car sounding different at start-up at altitude (6000 feet) last year at perhaps 3 degrees C, almost like the air injection system wasn't running.
I seem to remember my car sounding different at start-up at altitude (6000 feet) last year at perhaps 3 degrees C, almost like the air injection system wasn't running.