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Runs waaaay to rich, rough idle, sometimes stalling, black smoke out of tail pipe. Hesitation/jerks at cruise. New cap,rotor, wires plugs. plugs may be fowled now due to running rich.
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This is a lean Code. What is happening is too much air is entering the engine and the O2 sensor is making the engine run rich to rebalance the fuel ratio.
You need to find the leak. Use a spray bottle of water while the engine is running. When you spray over the leak, the rpm will change or the engine may even stall. This is where repair is needed.
black smoke equals too rich a fuel mixture. check the engine vacuum at idle should be 20 inches of mercury if not check for stopped up catalytic converter. are there any check engine lights
signs of a bad fuel pressure regulator. the vehicle runs rough, the engine will not start usually in the mornings. many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. black soot on plugs, blake smoke from tailpipe, running rough, stalling. you could have residue in fuel tank and need to change fuel filter again. have a very good day !!
Hi Gina.... Rough idle could be a number of things. The easiest and cheapest thing you could do is to replace the fuel filter. Usually they will run just a few bucks at the local auto store. If that doesn't do the trick, try to see if your car is smoking at all and try to determine if it is blue, black, or white smoke. Usually a blue smoke is oil, black is usually fuel richness, and white is coolant. White and blue are the most serious. If you are just burning extra fuel, you might need a tuneup consisting of new sparkplugs, maybe new sparkplug wires, new distributer cap, and distributor rotor. This might be a good time the change the oil and oil filter as well as check the other fluids such as transmission, coolant, and brake. Joe
How about plug wires they are sometimes the problem if plugs arent getting proper fire they sure do look bad .. look for any burns and check them close
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