Black soot in my exhaust |
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Black soot in my exhaust |
terrymason |
Feb 6 2007, 04:20 PM
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#1
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Member Group: Members Posts: 346 Joined: 23-November 05 From: Virginia Beach Member No.: 5,174 |
I fired up my 914, and let it idle in the drive way for a while, and noticed that small dots of black stuff (looks like oil splatter) seem to come out and stain the concrete. These aren't liquid at all, but are a black powdery soot.
Is it normal to have these black soot marks? Do you think this is because my car has sat for some time? |
terrymason |
May 10 2007, 10:25 AM
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#2
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Member Group: Members Posts: 346 Joined: 23-November 05 From: Virginia Beach Member No.: 5,174 |
Well, It's been a while, and I've finally gotten to work on my carbs. I've installed a new wideband 02 sensor, and have set the dwell and timing for my engine. Now I'm trying to dial in the mixture for my engine.
My wideband o2 meter starts off at 20 for about 10 seconds when I start the engine, then as the engine warms up, it settles down to a reading of 12. As I goose the engine, the readings go up to 15 or so, and fluctuate alittle, but eventually come back to 12 at idle Per my dell book, I started the mixture screws at 3 1/2 turns out. I kept turning them in until I was only 1 turn out. My o2 sensor read 13, but the car ran worse, popping and backfiring whenever I hit the gas. So now I'm sitting at 2 1/2 turns out, with a air fuel ratio of 12.2 or so. At this point, should I pull my idle jets (I currently have 60s on my 1.8L) and replace them with some #52 or #46 that I got off ebay? |
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