ka24de s14....blowin black somke

[driftsiidwayz]

hey guyz i need help.....

my car is hesitating and dying out more frequently....i changed knock sensor all the spark plugz accessories, changed temp sensor, even checked the ground cable and added new ground cable...i changed fuel filter 300zx type.....i even cleaned out the throttle body....i dont know whats wrong with my car..its been dying out and hesitating when im driving.....now i started the car and it wants to die so i rev the engine a lil bit and black smoke came out....i dont know if im runnin rich or what.....please someone help me.... oh yeh i need my 02sensor replace too....but even if i replace the 02sensor would that have been the problem for my car to die out on me or hesitating on me?......

[Gramentz]

What codes is it throwing?

[driftsiidwayz]

To be honest man......I really dont know,...I just know that the engine check light is on....

[matt4pl]

prolly burning oil... i bet on a blown headgasket, possibly leaky valve stem seals or spark plug bore gasket, but most likely headgasket. check your oil and coolant for contamination, pull out the spark plugs, see what condition they are in. if that doesnt answer the question, check compression, if compression is low, warm up the motor, perform a wet compression test. do a cylinder leakdown test.

[driftsiidwayz]

i think i have a failed mass air flow sensor....and an o2 sensor.....cause its smokes black when it starts to die and i want it to stay runnin so id hit the gas pedal a lil bit....and thatz when smoke starts to come out tha tail pipe......so wassup guyz what do you think

[matt4pl]

well check the codes, repair as needed. a failed MAF will not cause your car to want to die all the time, it will just run like garbage and not go past 2500rpm. i had my maf wires crack off at the maf plug, it threw a code, but i had no black smoke or anything.

[driftsiidwayz]

actually it was the MAF.......thanx peeps