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Old 03-07-2002, 17:00   #1 (permalink)
jsantas
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Black Smoke on Start up. Inconsistent missing.

Need to Pick peoples brains with this one. Here is the story. Spent lots of dollars on my ea. Probably wasted. But here goes anyway. Head was replaced recoed, Injectors, oxygen sensor, Fuel pump, Temp Sensor, New Leads, Plugs, Distributor Cap, Rotor and idle speed solenoid.
On Startup every morning the damn thing blows black smoke. Not Blue just black. Obviously running to rich. Once the smoke clears after apx 10 seconds idle increases. Coool. But the damn engine has an inconsistent miss during idle. Its a pain. Car is dual fuel. Miss still occurs on Gas as well. Car makes good power so i dont think its down on compression etc. Any advice is welcome. Can't afford to spend too much Dollars on this old beast. Its cost a small fortune as it is. No codes on the computer according to my mechanics diagnostic machine. Got us both stumpted. HELP.

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Old 03-07-2002, 17:02   #2 (permalink)
jsantas
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Black Smoke Inonsistent missing.

By the way its a 3.9 MPI engine 5sp Man.
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Old 03-07-2002, 17:21   #3 (permalink)
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Re: Black Smoke Inonsistent missing.

Is a faulty thermostat causing the car to run rich? That was the problem in my case...
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Old 03-07-2002, 17:31   #4 (permalink)
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fuel

i used to have that problem in my car ages ago when the injectors were leaky, you'll find that black smoke is fuel, oil is white i think i heard em say, when i had the problem the fuel would leak from the injectors, then after starting it would puff about of smoke and take 5-6 seconds to get to normal idle, maybe your injectors could be stuffed again who knows, when you do this next time, turn it on and see if it puffs, but then turn it off and start it say 10 seconds later and if it doesnt puff and idle funny it would be something to be with the EFI
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Old 03-07-2002, 18:12   #5 (permalink)
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Re: fuel

if you change to gas before the 1st 10 seconds does the black smoke stop?

i believe i either have a dodgy temp sensor or map sensor causing me rich cold starts...
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Old 03-07-2002, 20:00   #6 (permalink)
jsantas
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Black Smoke etc

Changed Temp Sensor and Thermostat. No change. Funny thing is even running on gas still get inconsistent miss. But the car still pulls quite ok. I just hate it when your in traffic and the damn motor shakes.
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Old 03-07-2002, 20:10   #7 (permalink)
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Re: Black Smoke etc

not sure about the black smoke, leaky injectors are usually my first guess.
the miss could be caused by a vacuum leak, find a vacuum gague and hook it up.
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Old 03-08-2002, 07:01   #8 (permalink)
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Re: Black Smoke etc

hes saying it does this on gas, hes said this twice people! ITS NOT THE INJECTORS!@

however, the other sensors are still used to control timing and idle, so it could be the map/air charge/tps. also, it could be your TFI module?
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Old 03-08-2002, 08:52   #9 (permalink)
VN MAN
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black smoke

he never said it just did it opn plain gas, he just said it had a inconsistent miss on gas as well as petrol, and he only said it once, read before you write son
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Old 03-08-2002, 14:00   #10 (permalink)
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Re: black smoke

most gas powered cars i have encountered (fuel injected at least) run on petrol at startup, thats why i asked if it smokes when he revs to change to gas.

also, he did say he is gettign the miss on gas also twice.

just trying to clear that up.
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