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Old 10-20-2011, 09:05   #1 (permalink)
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Escort Black Smoke

I've got a 1993 Escort 1.9L SOHC with a manual tran. Since getting colder out I have had a lot of problems with idleing, stalling, poor mpg and black smoke out of the exhaust. I have replaced plugs, wires, air filter, fuel filter, coolant temp sensor, throttle position sensor, upstream o2 sensor, and run more injector and engine cleaners through than I would like to list. I seem to have fixed the stalling and possibly the idle issues with the o2 sensor but i'm still getting the black smoke. What have I missed?
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Old 10-20-2011, 09:39   #2 (permalink)
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Re: Escort Black Smoke

Does that year / model have an EGR valve ?
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Old 10-20-2011, 10:42   #3 (permalink)
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Re: Escort Black Smoke

I'm not sure. I'm getting conflicting info with my searches. I can go look but I doubt that I'll be able to find it. I also forgot to mention that I replaced the mass airflow sensor as well.
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Old 10-20-2011, 17:45   #4 (permalink)
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Re: Escort Black Smoke

It's very possible that it's the fuel pressure regulator. It's mounted on the fuel rail and has a vacuum hose to it. See if there's fuel in the vacuum line.
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Old 10-26-2011, 19:26   #5 (permalink)
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Re: Escort Black Smoke

Took a look and it does have an egr, but it appears to be working. I popped the vacuum line off of it and blew in and it ran worse than usual haha. I'll check that other vacuum first thing. I checked all the other vacuum lines and they all seem to be sealed. Is there any chance this could be from one of my cylinders not firing?
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Old 10-27-2011, 03:31   #6 (permalink)
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Re: Escort Black Smoke

Have you done a compression test and if so what are the readings on each cylinder? What did each spark plug look like as you removed them?
When you check for vacuum leaks, spray starting fluid onto each line connection and note any changes in the engine.
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