Techs please help.... Engine wont haul ***

[ricky240sx]

hey guys... i have a sr20det redtop, bone stock, dc headers, straight pipe to muffler... ok heres the problem....when i change the spark plugs the are black... when i try pushing the car .. it wont go any where just black smoke comes out... i just changed my maf...i just got an oil change. whats wrong with my car.... it feel so sluggish... and like ....it dont want to go no where ... it idles constantly

[ACESXX]

--> I know that is gonna sounds stupid..... but have you change or checked the oil?

[icex01x]

headers on a turbo charged engine?anyway, black smoke and black plugs (i assume you mean caked on carbon fouled plugs and not wet oil fouled) are both indicators that you're running rich. there's too much fuel entering the cylinder and not all of it is getting used.could be a leaking injector, bad sensors or computer, bad fuel pump, among other things.check the oil, can you see or smell gas in it? if so, tow it to a mechanic.

black smoke = unspent fuelblue smoke = oil entering the cylinderwhite smoke (steam) = water/anti-freeze entering the cylinder

[icex01x]

--> I know that is gonna sounds stupid..... but have you change or checked the oil?

" ... i just got an oil change. ..."

[ACESXX]

...i just got an oil change.

--> sometimes you get unsuspected leaks and more than usual on an turbocharged engine.., you could be pouring all that new oil somewhere whenever you hit the gas...!!!

[icex01x]

--> sometimes you get unsuspected leaks and more than usual on an turbocharged engine.., you could be pouring all that new oil somewhere whenever you hit the gas...!!!

he also said that he's running dc headers on a sr20det, you can't have it both ways. and afaik dc doesn't make a manifold for the sr, just headers for the ka.

[OldmanPurdy]

...........DC headerS on and SR20DET? ummm ok any pics of that setup? sure its not a KA with a red valve cover . Anyways regardless of what engine it is that amount of black smoke leans towards a very rich mixture. Check all your sensors and connections paying particular attection to the O2, and MAF especially since you said you changed it. Was it doing this before the maf was changed? was it new or used? Also like ice said it could be a computer issue, are you running the stock SR ecu or do you have some sort of piggyback fuel management? Just some things to try.

[IHeartTurbo]

--> sometimes you get unsuspected leaks and more than usual on an turbocharged engine.., you could be pouring all that new oil somewhere whenever you hit the gas...!!!

Ummm, no. I'm assuming you're trying to say he's burning oil but that's not the case. If he was, it would be blue smoke, not black.

Like someone else said, you are running way too rich.

[ricky240sx]

well its a dc manifold, ill check today bout the oil issue...later today...i wish it wasnt 110 degrees out here...one of my friends say i have a blown turbo... would you agree

[ricky240sx]

i ahve stock sr computer... hers a pick of my engine... on photo buckethttp://i35.photobucket.com/alb...8.jpg

[IHeartTurbo]

well its a dc manifold, ill check today bout the oil issue...later today...i wish it wasnt 110 degrees out here...one of my friends say i have a blown turbo... would you agree

Easy way to check, with the engine off pull the intake tube off the compressor side of the turbo. Grab the compressor wheel and push in and out, and side to side. If there is a lot of play you need a new turbo. But that wouldn't cause you to run rich (which is what black smoke means) but it would cause you to burn oil. Double check on the color of the smoke. And if it's the turbo there will only be blue smoke coming out the exhaust when you go WOT.

[ricky240sx]

the car doesnt pull...but i hear spooling....it wont go pass like 2-3 lbs...thsi is fkin bs

[ricky240sx]

i really appreciate the replys..... well the car is for sale.... if ne one wants it .... you just to fix it ...fully drift spec car....

[OldmanPurdy]

I've never seen blown turbo blow out black smoke but you never know? Anyways IHeartTurbo beat me to it do what he said there should be a small amount of side-side up-down shaft play but any in-out shaft play is bad. Are you selling the car because of this problem? it really may be just some stupid little thing. Don't give up yet man.

[ricky240sx]

im selling car cuz ... im have a lil one coming ... its alot more expenses... just broughta crib... damm its expensive... i should have built it...... my car car is a show car...

[inquisitorof240]

Someone else said earlier in the thread that DC did not make a header for the SR, only for the KA. If this is the case you may have an exhaust leak. This causes "false air" (unwanted O2 in the exhaust stream) which the O2 sensor picks up and sends a lean signal to the computer. In turn, the computer compensates by adding fuel which may cause a rich condition. I have seen this in person.

[SeVa-S13]

Ok, somehow people don't know AEM (DC) makes a turbo manifold for the RWD; they do.Also, "header" is just slang for the exhaust manifold, no matter if you think it should be used with turbo manifolds or not. Get off the guy's nuts in general.

But yeah, I'd guess you were running pig rich too. How's your intercooler piping? The ECU isn't spitting any codes? New O2 sensor and all that?

[ricky240sx]

ill check my o2 sensor.... damm my car is like 2 inches to the floor..its gooan be a bichhh jacking it up....when i try driving it yesterday... it barely moves in first gear... i checked all my ic pipping... all secure......hwo do i check my injectors...wat doe i use to tell if my 02sensor is rotten... im fairly new to this ...i really appreciate the help...

[ricky240sx]

its a DC exhaust manifold... i hoping i dont have to replace th eturbo or its somting that is wrong with my engine...