at wits ends, still smoking - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Maxboost · 07-02-2005, 11:31 PM

Ok, still running a ka24e. The car is functioning fine. I put everything back together after a warped head (milled to specs, with new gaskets all the way around.) I get the car running, and it runs great for about 2 weeks. I come home from work, park the car, shut it off. I go out the next evening for a quick ride, and I start it up. It's idling like crap, I can smell raw fuel, and I have a ton of smoke coming out of the tailpipe. Its white, and it smells like unburnt fuel. I already knew my fuel pump was about to call it quits. So I replace the fuel pump today, fuel filter, strainer. I also tested my TPS, and the voltage at idle, and at WOT were way off, so I replaced it as well, hoping that it would at least rememdy the problem. Well it allowed my car to start now, but it is still idling poorly, and I still have white smoke coming out of my tailpipe. I did a leakdown test, to check and see if there could be some chance of more head problems, but it checked out fine. I pulled my MAF today, and noticed that the heated wires are coated in carbon. Could a faulty MAF sensor be doing this? I also just had the injector wiring harness redone (nissans problematic corrosion problem with the terminal ends.) Any help would be great. I'm lost, and FSM is in Cali. I've never had a problem like this before. Thanks in advanced. Coil? Ign. Module?

ledzeppelin240 · 07-03-2005, 01:46 AM

Your ignition system would not cause the smoking, although it could contribute to the other problems you are having. So check the ignition system and make sure everything is in good condition.

The white smoke would mean coolant is being burnt in the combustion process. If the car was burning coolant before you should have replaced your O2 sensor cause it would have been screwed due to the coolant. Right now the coolant you are burning could be causing a miss-fire.

Also resurfacing the cylinder head will not fix the warped head due to it being an OHC head. It needs to be straightened and then resurfaced. Other wise all you have done is resurfaced a head but yet your cam bore is still warped.

What you have to do then is determine where the internal coolant leak is coming from.

91rusty240sx · 07-04-2005, 03:01 PM

clean out your maf and see what happens.

aznpoopy · 07-04-2005, 03:26 PM

pull your sparkies and see if they are wet

i bet its a leaky injector

my dohc was acting much the same way

uno · 07-04-2005, 03:32 PM

did you have the valve seals replaced when you had the engine work done?

skatanic28 · 07-04-2005, 04:07 PM

sounds like a leaking injector/o-ring to me too.

ledzeppelin240 · 07-05-2005, 12:03 AM

Hmm....A leaking fuel injector will cause a hard start if the car hasn't sat very long after been last shut down. Do you have that problem? Or check your O2 sensor voltage to see where it is hanging around at the most, rich or lean or normal?

lefhand180 · 07-08-2005, 10:54 PM

i have the same exact problem mines is hard to start and when it does it idle real bad and tons of white smoke comes out of the exhaust how do you check the coolant problem out?

07-02-2005, 11:31 PM	#1
Maxboost Join Date: Oct 2003 Location: Orlando Posts: 32 Trader Rating: (0) Feedback Score: 0 reviews	at wits ends, still smoking Ok, still running a ka24e. The car is functioning fine. I put everything back together after a warped head (milled to specs, with new gaskets all the way around.) I get the car running, and it runs great for about 2 weeks. I come home from work, park the car, shut it off. I go out the next evening for a quick ride, and I start it up. It's idling like crap, I can smell raw fuel, and I have a ton of smoke coming out of the tailpipe. Its white, and it smells like unburnt fuel. I already knew my fuel pump was about to call it quits. So I replace the fuel pump today, fuel filter, strainer. I also tested my TPS, and the voltage at idle, and at WOT were way off, so I replaced it as well, hoping that it would at least rememdy the problem. Well it allowed my car to start now, but it is still idling poorly, and I still have white smoke coming out of my tailpipe. I did a leakdown test, to check and see if there could be some chance of more head problems, but it checked out fine. I pulled my MAF today, and noticed that the heated wires are coated in carbon. Could a faulty MAF sensor be doing this? I also just had the injector wiring harness redone (nissans problematic corrosion problem with the terminal ends.) Any help would be great. I'm lost, and FSM is in Cali. I've never had a problem like this before. Thanks in advanced. Coil? Ign. Module?

07-03-2005, 01:46 AM	#2
ledzeppelin240 Zilvia Addict Join Date: Sep 2003 Location: Sinse Posts: 688 Trader Rating: (0) Feedback Score: 0 reviews	Your ignition system would not cause the smoking, although it could contribute to the other problems you are having. So check the ignition system and make sure everything is in good condition. The white smoke would mean coolant is being burnt in the combustion process. If the car was burning coolant before you should have replaced your O2 sensor cause it would have been screwed due to the coolant. Right now the coolant you are burning could be causing a miss-fire. Also resurfacing the cylinder head will not fix the warped head due to it being an OHC head. It needs to be straightened and then resurfaced. Other wise all you have done is resurfaced a head but yet your cam bore is still warped. What you have to do then is determine where the internal coolant leak is coming from. __________________ Anyway, no drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power. Looking for: JDM S13 OEM Sideskirts

07-04-2005, 03:01 PM	#3
91rusty240sx Zilvia Junkie Join Date: Oct 2003 Location: Los Angeles, CA Age: 39 Posts: 467 Trader Rating: (1) Feedback Score: 1 reviews	clean out your maf and see what happens. __________________ Tony

07-04-2005, 03:32 PM	#5
uno Zilvia Member Join Date: Mar 2003 Location: Castlewood VA Age: 43 Posts: 174 Trader Rating: (0) Feedback Score: 0 reviews	did you have the valve seals replaced when you had the engine work done? __________________ CA18DET t25, 440CC injectors, Greddy FMIC, Greddy Hot Pipe, Greddy Type RS Bov ,Greddy Turbo Outlet, Trust DP, Motoria 3" Catback , XS Tubular Manifold, Nismo AFPR ,Nismo Engine and Transmission Mounts ,Apex'i SAFC 2 Walbro 255lph, LSD, SPL Subframe Collars, Tein S Tech Springs, Tein Tie Rods, Upper Front and Rear Strut Tower Braces. Black 180sx wheels.

07-05-2005, 12:03 AM	#7
ledzeppelin240 Zilvia Addict Join Date: Sep 2003 Location: Sinse Posts: 688 Trader Rating: (0) Feedback Score: 0 reviews	Hmm....A leaking fuel injector will cause a hard start if the car hasn't sat very long after been last shut down. Do you have that problem? Or check your O2 sensor voltage to see where it is hanging around at the most, rich or lean or normal? __________________ Anyway, no drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power. Looking for: JDM S13 OEM Sideskirts

07-04-2005, 03:26 PM	#4
aznpoopy Post Whore! Join Date: Mar 2003 Location: New Jersey Age: 44 Posts: 5,013 Trader Rating: (1) Feedback Score: 1 reviews	pull your sparkies and see if they are wet i bet its a leaky injector my dohc was acting much the same way

07-04-2005, 04:07 PM	#6
skatanic28 Zilvia Junkie Join Date: Oct 2002 Location: ny Age: 41 Posts: 443 Trader Rating: (0) Feedback Score: 0 reviews	sounds like a leaking injector/o-ring to me too.

07-08-2005, 10:54 PM	#8
lefhand180 Leaky Injector Join Date: Jun 2005 Location: so cal Age: 39 Posts: 50 Trader Rating: (0) Feedback Score: 0 reviews	i have the same exact problem mines is hard to start and when it does it idle real bad and tons of white smoke comes out of the exhaust how do you check the coolant problem out?