Running Rich On Every Start Up

[RamR33]

Hey guys,

Having a problem with my R33 series 1 running rich for for 30 secs to a minute every time i start it wether its cold or hot/normal temp.

Ill try give as much detail as possible

car has stock air box,stock exhaust,power fc,550cc injectors,,FMIC,Z32,YJ coilpacks and new set of plugs bcpr6es gap .8 and also tryed bosh platnums 1.1 and stock boost now.

first off i had this car with facefoward plenum and was running sweet with all the stuff above mentioned done but got defected so went back to all stock intake plenum/runners/bov and emissions which was the only thing put back on.

Everytime now i start it just black smoke all the time no matter wat temp its on and does it for awhile then clears up.

mechanic checked fuel pressure/FPR all great perfect...afm been cleaned,panel filter cleaned plugs new,coil packs good but still this happens.

also cleaned aac valve which helped with the hunting up and down.

Thought maybe leaky injector but all these things mentioned was not doing at all with them on with the face foward greddy type plenum.

Mechanic said could be that plenum holes smaller now and has afected its air fuel mixture and making it run rich but its not running all the time rich just as i have said.

What u guys think,might need a tune or something else,any help would be great.

[Hadouken]

Id get a tune for sure. Its running rich because you changed a heap of stuff.

[blind_elk]

Does the PFC have "post-start enrichment"?

[RamR33]

only three things have been changed,the plenum,stock bov from aftermarket one which is plum back style i had on before and the intercooler pipe throttle body side,thats it.

not to sure if the PFC has post-start enrichment.Full throttle is good but just down low is a lil rough sometimes but the start up everytime is terrible just black and black and clears up after awhile.

maybe someone can tell me some step adjustments on the power FC for what to do for the start up??

Edited February 28, 2013 by RamR33

[mad082]

did you have to remove the injectors when you swapped plenums? if so, i'd say you have a damaged o-ring on an injector. definitely not something you want to keep driving with, because if it gets worse then you might be up for a new engine (i know a guy who had an o-ring let go on his built s13 and it resulted in a hole in the side of his engine.....)

for the sake of a few dollars for new o-rings i'd be pulling the injectors out and replacing them. possibly even have the injectors professionally cleaned while they are out

[RamR33]

The injectors wernt removed but noticed as soon as i took that crap stock exhaust system off it ran 100 times better with my 3inch and less smokey as the tune before that i had with my power fc was made for all aftermarket mods and since putting the exhaust and pod filter back on performance is way smoother and less smokey so most likley the tune is the problem.....

[Hadouken]

The injectors wernt removed but noticed as soon as i took that crap stock exhaust system off it ran 100 times better with my 3inch and less smokey as the tune before that i had with my power fc was made for all aftermarket mods and since putting the exhaust and pod filter back on performance is way smoother and less smokey so most likley the tune is the problem.....

Oh really?!

[RamR33]

Yes it runs heaps better.

The idle seems to run around 200rpm rpm higher now after exhaust was put on so could to with an adjustment but as for black smoke nothing like before ,puff puff puff on start up.

Had a read on here some ppl saying when clearing defects with there moded 33,s there car runs and goes like crap with the stock exhaust.