b20a trouble

[jordancar]

Hi every one , I do have imported accord 1987 with b20a engine , recently I have high fuel consumption (around 5km/ltr) with black smoke comes out from exhaust . some of the garages say that i have something wrong with the injection unit , I also noted that spark plugs always carbonated , no one here is familiar with b20a so i will try to do every thing myself , any suggestion ?

[AccordB20A]

Fuel return line blocked? broken fuel pressure regulator on the end of the fuel rail?
is the "check engine" (PGMFi) light on?

[jordancar]

check engine is off and I will check what you mentioned , I will update you soon .

[obdriver6]

It could also be thats its not getting enough air (restricted air intake, dirty air filter).

[jordancar]

Guys it was the map sensor , there was no feedback about manifold pressure to the ecu ,so the air and fuel rate were not normal .
I found the map hose disconnected , fixed back and it sounds normal now , thanks for your help .