[djlehmann]

looking to buy an 02 7.3 and ran just fine but when I floored it tons of black smoke poured out exhaust..I've had several 7.3's and never had that happen..what is likely cause of that?

 

[action4478]

It may have a programmer or a chip....

 

[Pocket]

Did it feel stronger than a stock 7.3L? If not it might be a boost leak.

 

[action4478]

No disrespect to Pocket intended....

This is from one of our resident experts....Steve Bas...

White smoke:


Caused by unburned fuel passing through the engine. Some white smoke is normal on cold start-ups. Excessive white smoke could be an indication of inoperative glow plugs, loose injectors, low compression from worn rings or bent connecting rods, or coolant leak into the cylinders--head gasket or injector well sleeves.

Black smoke:


Caused by excessive fuel for the amount of air drawn into the cylinders. Some black smoke on hard accelerate or at higher altitudes is normal. Excessive black smoke could result from restricted intake or exhaust, inoperative leaking or weak turbo, intake hose(s) leaks, leaking or worn injectors, fuel return or supply restriction, stuck Exhaust Back Pressure Regulator valve or solenoid. Also PCM inputs such as BARO MAP ICP or EBP sensors.

Blue or blue/white smoke:


Caused by insufficient fuel or oil consumption. Normal when engine is cold or idling for extended periods. Excessive smoke could be caused by air in the fuel, contaminated fuel, loose or plugged injectors, worn or leaking injector o-rings, thermostat stuck open, oil consumption, or plugged crankcase depression regulator valve. Also PCM inputs such as MAP or ICP sensors.

Steering Wheel

 

[Kanman]

Does the black smoke clear up after the turbo spools up?

 

[djlehmann]

seems that it cleared up only after letting off of it but didn't know at the time what I've learned just now and what to look for thanks to all of you

 

[Swellmel]

First thing I'd do is check the airfilter second check the pcm to see if there is a chip pluged in third check cooler boots clean and tight fourth put a boost gauge on and what it's making.