Re: Tapping/diesel noise on accelleration when cold - Saab 900 Bulletin Board - Saabnet.com
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Re: Tapping/diesel noise on accelleration when cold
Posted by 86spg (more from 86spg) on Wed, 21 Jan 2004 13:27:06
In Reply to: Tapping/diesel noise on accelleration when cold, Hood, Wed, 21 Jan 2004 11:37:16
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Seems strange
I assume the cold start circuit works fine and the car starts up without issue. In theory you should be running rich mixture when cold. As the coolant temp rises the mixture is leaned. Just like a choke in a Carb. It could be your coolant temp sensor is bad and the car is running lean when cold. This however is not likely but a possibility.
Pinging, or detonation can cause damage by running a lean mixture and to far advanced timing, check the timing should be at 14-16deg BTDC on your car with vacuum advanced hose removed and plugged.
Pinging blah blah reading
http://www.amxfiles.com/resource/tech/timing.html
It could well be valve tappets being the clearence is largest when cold. Not likely.
When the engine heats up does it do the same thing. ?
86spg
posted by 143.232.11...
Posts in this Thread:
- Tapping/diesel noise on accelleration when cold, Hood, Wed, 21 Jan 2004 11:37:16
- Re: Tapping/diesel noise on accelleration when cold, Saabu
, Wed, 21 Jan 2004 21:41:14 - Re: Tapping/diesel noise on accelleration when cold, 86spg, Wed, 21 Jan 2004 13:27:06 <-- Viewing This Message
- Re: Tapping/diesel noise on accelleration when cold, Eiron, Wed, 21 Jan 2004 12:21:50
- Re: Tapping/diesel noise on accelleration when cold, No Snaab, Wed, 21 Jan 2004 12:10:30
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