1987 Mustang 2.3L Black smoke out exhaust, need help!
black smoke coming out of exhasut no clue as of why. ive replaced the fuel pressure regulator and injectors along with the IAC valve. it only does it after the car has warmed up and is at low idle and when it starts smoking the volts gauge drops down and the car seems like its about to cut off. Any suggestions?
you prob singed a valve and/or an injector. Black smoke is usually a rich condition, too much gas. Im thinking it building in the cylinder and its comming out the exaust port. I would check you spark plugs for the condition. Your cylinder is prob loading up on fuel. Blue smoke would be oil...... Let us know, good thing you only have 4 cyl to deal with! Check those plugs and your injector.
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95 Mustang V6: K&N Air Filter, Flowmaster True Duals, Short Shifter, 160 Amp Alt, Optima RedTop 95 Mustang V6 -Problems- 88GT Convertable 5.0HO: B-303 Cam, Taylor Wires, MSD Dist, 3.73's, BBK Cold-Air Intake, 65mm Throttle Body, MAC Shorty Headers, Mac X-Pipe, Mac Muflers, BBk Underive Pullies 2001 Ford Focus: 6Spd SVT Gearbox, AEM Strut Bar, Steeda Clutch, Steeda Short Shifter, Volant 4" Cold-Air, EGR Eliminator, SVT Suspension, Optima RedTop, 65mm Focus Sport Throttle Body, Tuned
Like "chris" said she's running rich.
I see you got a new fule pressure regulator.
You'll have to play with it to get it to the right psi. I'd also run "seafoam" through your motor.
That black smoke dosent play friendly with a motor and it's intrenals. Sea foam will clean all the carbon and junk from your motor and heads.
I'd also run some injector cleaner in the gas.
The more you can do to clean the inside of that motor the better.
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When the people fear their government, there is tyranny; when the government fears the people, there is liberty.
--Thomas Jefferson
Well i took your advice and pulled the plugs and they were black i just did a tune up not to long ago too so they shouldn't be this bad. i thought maybe a sensor was causing her to run rich but im guessing no. how can i find out if there trouble inside the motor? AND i dont know if its relevante but theres alot of oil inside the throttle body and inside the upper and lower intake and i dont know why...
You could have lost compression in a cylinder with the lean fuel or rich fuel, either way I would do a compression test, rent on at AutoZone $20? but you would find everything you need to know on that test alone. You need all Cylinders to be within +/- 20% of each other. If you have a bad cylinder it would read low maning a piston ring or even your valves could have gone. I would suspect maybe the valve stem itself on all the valves. How many miles on the motor?
I hope you get some Bosch Platinum 2's at the very least, get a new ignition rotor and clean the cap inner contacts. If you have good Compression then you need at least 35-40 Psi of pressure, If you have that then you need to adjust your fuel mixture, I would have that done proffesionally if your not savvy. Some Seafoam would work wonders too as earlier advised. I hope it works!
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95 Mustang V6: K&N Air Filter, Flowmaster True Duals, Short Shifter, 160 Amp Alt, Optima RedTop 95 Mustang V6 -Problems- 88GT Convertable 5.0HO: B-303 Cam, Taylor Wires, MSD Dist, 3.73's, BBK Cold-Air Intake, 65mm Throttle Body, MAC Shorty Headers, Mac X-Pipe, Mac Muflers, BBk Underive Pullies 2001 Ford Focus: 6Spd SVT Gearbox, AEM Strut Bar, Steeda Clutch, Steeda Short Shifter, Volant 4" Cold-Air, EGR Eliminator, SVT Suspension, Optima RedTop, 65mm Focus Sport Throttle Body, Tuned
First thing to do, replace your PCV. Then get a can of FI cleaner and clean out the intake path and throttle body.
Doing the SeaFoam thing can't hurt either. Note, SeaFoam is a brand name. Make sure you get the engine cleaner that can be run through the engine.
Next, run codes and see if the ECT (Engine Coolant Temp) sensor is pooped. I am guessing that it is running fat because the sensor is pooped or the end of it is caked with scale and schmegma, prohibiting it from doing it's job. If it is scaled up, it may not ever show up when running codes, but still can't see the coolant temp correctly either.
The car should run rich during the cold start stoich. Much like having a choke on a carb. When it warms up, the sensor "talks" to the EEC and the EEC will then adjust injector pulse to compensate for engine temp.
I recommend good old Motorcraft spark plugs. All the fancy brands/metal types are just hype. Even the turbo guys pushing 20lbs+ of boost and over 300 HP use the stock applications with no problems. Ignition problems are rarely spark plug related on these engines.
Did you replace your FPR with a stock NON-adjustable type? If so, you can't do anything with your fuel pressure, and really don't need to if you are running an NA motor. You should be running about 38 psi with the vacuum line disconnected. to the FPR.
well i added the seafoam and i think it helped. the car seems to only mess up after you drive it for 5-10 minutes and it doesn't smoke or act like its running on 2 cylinders for a few seconds at a stop light. Just out of the blue what is a 2.3l auto supposed to idle at normally? Mine idles at about 1200rpm and the idle screw is backed almost all the way out.
well i added the seafoam and i think it helped. the car seems to only mess up after you drive it for 5-10 minutes and it doesn't smoke or act like its running on 2 cylinders for a few seconds at a stop light. Just out of the blue what is a 2.3l auto supposed to idle at normally? Mine idles at about 1200rpm and the idle screw is backed almost all the way out.
Couldnt tell ya the right rpm. But I do know that 1200rpms at idle is to high.
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When the people fear their government, there is tyranny; when the government fears the people, there is liberty.
--Thomas Jefferson
i swapped out the computer for the hell of it and surprise my car is running fine and idleing fine with no black smoke. has anyone heard of a cars computer being screwed up? i mean my cars been doing fine for the past 3 days with no sign of its bad behavior. i dont know if the computer was the prob. or not but it seems like it was.
1987 Mustang 2.3L Black smoke out exhaust, need help! 
