motor was rebuilt last summer.
ctr pistons, rm cams..

-car spits black stuff off tail pipe. (water+black stuff) not oil
-car wants to stall on cold start.
-after car's warmed up it idles erratically rpm goes from 800-(1250-1300)rpm
if i disconnect the tps sensor it idles high at 1500 rpm.

i failed e test cuz of it won't idle steady.

what could be the problem ???
thanks

 

bump

 

Im not sure if this is related,

but I had a very similar problem on my sr20det 240sx and it turned out to be a bad fuel injector and a bent fuel rail.

when i put in new injectors and a new rail the car idled as perfect as a brand new car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by goldegg &raquo;</TD></TR><TR><TD CLASS="quote">Im not sure if this is related,

but I had a very similar problem on my sr20det 240sx and it turned out to be a bad fuel injector and a bent fuel rail.

when i put in new injectors and a new rail the car idled as perfect as a brand new car.</TD></TR></TABLE>

hmm i do have new injectors .. i should check the wiring again. i guess

 

Do you have any vacuum leaks? Is the IACV good? Do you have any air in your cooling system?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by inspyral &raquo;</TD></TR><TR><TD CLASS="quote">Do you have any vacuum leaks? Is the IACV good? Do you have any air in your cooling system?</TD></TR></TABLE>

no vacuum leaks i think.

which way do i need to turn the screw to lower the rpm?

 

clockwise