Really Weird Problem (Searched)

[bardabe]

Alright I used hte all mighty search function and foind nothing.

I was waiting in trafic (one of those lights that tend ot take like 5 minutes to change) and all of a sudden my car starts smoking heavy (white) and then the light turns green, i get ont he gas and the car runs, well fine. (noticed a power loss but not dramatic) then ok I'm driving and hey the car runs fine but dosent pull as hard as it should. so I get to my friends house and change the Intake manifold Gaskets and Injector O-Rings. (yeah I keep some in stock just in case) and so I turn the car back on and well it idles smoother. but after 2 - 3 minutes it starts smoking again..... so I drive it home and on the way where getting these crazy *** backfire (sounds like gunshots) and flames on the way. the whole time it was friggin loud. and so I park the car and let it sit over night. ...

This morning, the start up was really really rough (it didn;t wanna start I had to give it some gas for it to fire up), and then it idled. fine. same problem after 2-3 minutes it started smoking. so It ake it on a drive and same stops smoking let it idle for 2-3 minutes and bam the smoke is back. so I start to unplug one injector at a time. and when I get to injector numebr 2. i unplug it and the car stops smoking. I changed the injector (I have 2 extra sets of 370's) and fire the car up. .... same thing starts smoking, unplug injector number 2 and no more smoke. so I change it again. and repeat. then change again and repeat.... the only thing I have in mind is my ECU might have gone bad. I would run ECU diagnostics but my ECU dosent have the screw for it (Code 63) ....

Help me please!

[jdm_master_X]

if the problem is only isolated to injector 2, it seems to me the pulse width is not long enough for the injector to spray enough fuel into the chamber. there seems to be a defect in the circuit perhaps, creating that lean misfire.

[9240sx]

Timing getting pulled??

[bardabe]

if the problem is only isolated to injector 2, it seems to me the pulse width is not long enough for the injector to spray enough fuel into the chamber. there seems to be a defect in the circuit perhaps, creating that lean misfire.

or too long because it was flooding my cylinder last night Spitting some insane flames and loud *** backfire on decel

[jdm_master_X]

all in all, it means the fuel injector is not being pulsed the correct amount of time. i would check fuel pressure, resistance in the injector, and the fuel rail.

[Blown240sx]

White smoke isnt Fuel its Oil. Black is Fuel. White would be Turbo Seals, HG, Blow by or Piston Rings.

[bardabe]

White smoke isnt Fuel its Oil. Black is Fuel. White would be Turbo Seals, HG, Blow by or Piston Rings.

Blue Smoke = OilBlack smoke = RUnning richWhite smoke = Leaking injector, Turbo seals, Hg, and Blow by

i know from experience. I checked the coolant and Oil and it dosent seem to be mixed.

all in all, it means the fuel injector is not being pulsed the correct amount of time. i would check fuel pressure, resistance in the injector, and the fuel rail.

alright will do. ehhh what;s the resistance suppose to be? fuel pressure is set at 42base. and the fuel rail is clean and straight.
Modified by bardabe at 10:56 PM 11/11/2006

[bardabe]

Alright.... uhh. yeah. uhm The smoking got a littel worse today. it dosent go away no matter what cylnider I unplug.... but still it only smokes ad idle. I took the car on a drive today arroudn the neighborhood. and then when I got back I parked it. and when I took the radiator cap off a little bit of smoke was coming out. and then I did the same ting for the oil. and guess what. saem result. uhhh think My Turbo is going bye bye?

[Blown240sx]

LMAo you just corrected me then came back and said what I told you...

Also Injectors leaking does not cause white smoke cause guess what Ive been there and had to fix it. It cause the car to run rich causing black smoke and fuel smell under the hood. But I guess Im wrong since its already happend to me.

Also if you can see the smoke while idle but not driving its most likely turbo.

[bardabe]

http://www.youtube.com/watch?v=lUOkNy4rsVoAlright performed a compression test just now. and these are the readings. 150-145-145-150 Pulled my spark plugs. (I replaced them 2 weeks ago along with my oil change. [Cold weather means Heat range 7 plugs with 10W-30 full synthetic oil] and they are fouled)



So perhaps my MAF took a **** on me. now to test the MAf. ehhh.. my pc crashed and I dun got adobe acrobat. what should the MAF voltage be at idle?
Modified by bardabe at 5:00 PM 11/13/2006

[Blown240sx]

Your plugs being white shows they are running very lean.

Also your motor sounds like ****. And I dont see any smoke...... Also the smoke coming out from the head is cause your motor is hot....

[bardabe]

Your plugs being white shows they are running very lean.

Also your motor sounds like ****. And I dont see any smoke...... Also the smoke coming out from the head is cause your motor is hot....

if you are talking about the Clunking noise its my fender. teh brace ont eh bottom front broke. and the 2 pieces are rubbiogn together and clunking against my iC piping. but hey thanks for the compliment

[RyanAwesome]

Your plugs being white shows they are running very lean.

Also your motor sounds like ****. And I dont see any smoke...... Also the smoke coming out from the head is cause your motor is hot....

theres no reason to be a d!ck.

i would start checking the cylinder with the darkest looking spark plug. to me it sounds like an ignition problem. aparently you are getting enough fuel. now find out why the cylinder is not firing the spark.

[Blown240sx]

Wasnt being a d!ck just telling the truth it sounds like his lifters are clicking or something Ive never heard an SR with that much head noise in good condition. Maybe its just the audio on the camera.

Also I still didnt see any smoke on the video.... If its white though or bluish white its oil most likely turbo seals or blow by due to a faulty or missin PCV valve. Ifits black its fuel which could be many things electrical or as simple as gap on a plug.

Also when you up the FP with the after market regulator the Stock ECU is going to run rich thats common with any ANY SR.

[RyanAwesome]

he said at first it only affected cylinder 2. then it was affecting all cylinders. if it was fuel pressure, it would of affected all cylinders all the time. my guess is that he fouled the plug so bad that what little spark he had was now completely gone in the one cylinder.

[RyanAwesome]

by the way, the stock ecu will run the way it think it should. the ecu thinks the fuel is correct. but added fuel pressure would make the air fuel mix richer. there is no fuel pressure sensor input to the ecu. depending on if the oxygen sensor is hooked up or not, im not sure how smart the old nissan ecu's are but it might compensate a small slightly for the ammount of oxygen in the exhaust stream

[Ramius83]

Ummm, white smoke is usually the cause of water entering the cylinders in some form or other. You could possibly having a leaking water jacket into Cylinder number 2 via a slight crack or break in the headgasket. This is related to why you unpluged cylinder 2 and the smoking stopped because the headgasket is leaking only into cylinder 2.

Even though you did a compression test and everything appeared fine, it could still be failing once the engine heats up and everything starts to expand, ie. head, block, sleeves, headgasket, etc. Under what principles did you perform the compression test, ie. engine warm?, throttle body open?, fuel pump or injectors unplugged?, etc.

[Ramius83]

And on another note regarding the possibility of the turbo seals possibly being bad. Turbo seals will go bad in two ways. One way are the oil seals. Bad oil seals would result in a blueish smoke exiting with the exhaust. Can't argue that point one bit.

Now bad turbo water seals are a different thing. If the water seals are only leaking into the exhaust, then you will only get a white smoke out of the exhaust, but you will most likely NOT see any decrease in engine performance. Now, if the turbo water seals are leaking into the compressor side of the turbo, then you will be seeing white smoke in the exhaust, PLUS engine performance side-affects. With water entering the intake tract, you will see a lean condition on the plugs, pulsating/loss of power, etc etc. But, you need to check your hot-side Intercooler piping on YOUR "passenger's" side of the Silvia. If the turbo water seals were in fact bad and leaking into the compressor, the inside of your hot-side intercooler piping would be "wet" and have evidence of water droplets or condensation along those lines. If you found this, then you most likely have bad water seals in the turbo.

[exode]

headgasket? why don't you turn it on and see if the smoke is coming from the lower part of the engine or the top

if its the top its a headgasket, or ingition problem (or lets hope so) if its the bottom it could be your turbo is burning oil somehow (usually a bad oil line to your turbo that leaks, check the seal) could be leaking and burning up on your turbo

try and isolate the problem a little bit more, have someone wind up your turbo for a few minutes and see where the smoke is coming from