Car ran this morning but produce black exhaust and was skipping - repalced ignition coils and the fuel pressure regulator now no smoke or skipping but have to play with the throttle to get it to run will not idle

On a newer vehicle with fuel injection, black exhaust smoke can be caused by one or more leaky fuel injectors, too much fuel pressure (sticking fuel pressure regulator), a faulty MAF sensor or Oxygen sensor, or a engine computer fault. with diesel engines,black smoke in the exhaust can occur during hard acceleration.

The first things you should check are your air-filter and other intake components like sensors, fuel injectors and the fuel-pressure regulator. Other reasons could be a clogged fuel return line.

Black smoke, real black, is unburnt fuel in the exhaust. If it clears up in a very short time, it may be only due to the extended cranking you have to go through to get it started. If fuel consumption is not awful, it is possible that the hard starting is not a fuel problem. If this is fuel injection, too much gas could be leaking injectors, but as above, if it clears up right away, the smoke was from extended cranking forcing all that gas into the cylinders. You probably should check fuel pressure, always do that for hard starting.

Check your ignition system, use a calibrated spark tester. Need new spark plugs and/or plug wires?

Black smoke could be oil burning or unburned gas going out the exhaust. Blackened plugs and running very rough could be too much gas in the cylinders. Check fuel pressure, check fuel pressure regulator-look for evidence of gas in the vacuum line to the regulator- a sign the regulator is bad allowing excess gas into the engine. If fuel pressure is correct, check for leaking injectors, also check ignition system. Do you have a strong blue spark?

check your fuel pressure,if not right before you go buy new fuel pump,try new fuel filter
2- take the vacuum line to fuel pressure regulator .if it is wet with gas,the diaphragm is ruptured need new regulator
3- have exhaust shop check you cat convertor,also if you recently have head gasket problem,some of those anti freeze is burned by engine and ran through your cat convertor causes it partially plugged,
4- A bad throttle position sensor could be another cadidate
5- bad or old ignition coil could be also the reason,as it could not produce enough juice on higher R.P.M

black smoke rich fuel emission possible causes could be faulty ignition coil,bad oxygen sensor.worn engine valves low cylinder compression.faulty fuel pressure regulator.

BLACK SMOKE RICH FUEL MIXTURE. A IGNITION COILS. RESTRICTED AIR FILTER, FAULTY FUEL PRESSURE REGULATOR, FAULTY MAP SENSOR,EVAP CANISTER GAS SOAKED.VACUUM LEAK AT INTAKE,CHECK FOR LEAKING EGR VALVE OR PCV.

signs of a bad fuel pressure regulator-- the vehicle will run 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. replacement is only cure. 1- black soot on plugs-2-black smoke from tailpipe-3- running rough-4- stalling, good-day! repost if need be.

BLACK EXHAUST SMOKE IS A RICH FUEL MIXTURE.CAUSE BY WEAK SPARK IGNITION, FAULTY MAP SENSOR CHECK MAP SENSOR VACUUM HOSE AND ELECTRICAL CONNECTOR BECAUSE BAD MAP SENSOR WILL CAUSE RICH FUEL MIXTURE CHECK THE VACUUM LINE GOING TO FUEL PRESSURE REGULATOR, MAKE SURE FUEL PRESSURE REGULATOR GETTING VACUUM AT VACUUM LINE IF NOT LOOK FOR BROKEN OR DISCONNECTED VACUUM LINE TO FUEL PRESSURE REGULATOR, CHECK FUEL PRESSURE REGULATOR VACUUM LINE IF YOU SEE GASOLINE IN VACUUM DIAPHRAM TO FUEL PRESSURE REGULATOR REPLACE FUEL PRESSURE REGULATOR,CHECK THE EVAP CANISTER IF GAS SOAK IT WILL CAUSE RICH FUEL MIXTURE.

CHECK FUEL PRESSURE.IT SHOULD BE 53 - 63 PSI YOU COULD HAVE A BAD FUEL PRESSURE REGULATOR OR BAD MAP SENSOR.AC CLUTCH NOT WORKING.CHECK FUSE AND RELAY.IF ALL IS GOOD YOU HAVE LOW REFRIGERANT HAVE IT CHECKED.IF ALL IS GOOD AC COMPRESSOR CLUTCH OPEN OR COMPRESSOR FAULTY.THE INTERIOR TEMP GAUGE NOT WORKING COULD BE LOOSE WIRE OR ENGINE HAS A BAD OPEN COOLANT TEMPERATURE SENSOR.

Hello Warebaby.
Black exhaust indicates unburned fuel.
This can be caused by many things.
Bad ignition-spark plugs, wires, distributor cap, rotor, coil, ignition timing.
Excess fuel going in- bad injector, fuel pressure regulator.
Electronics-map sensor, throttle position sensor, oxygen sensor being most common.
Could be a good time to tune it up first