help me NISTECH

ONLY for ADVANCED technical discussion about the 240sx!
ss240
Posts: 127
Joined: Sat Aug 23, 2003 10:04 pm

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Hey man,

just before i had a change to replace the injector i had that massive white smoke coming out my exhaust... fuel is what you thought....

replaced my injector today... car won't start unless i have the pedal floored and even then, it only goes to 2k rpm and is still very boggy...

now white smoke from under the hood and closer look shows a black fliud covering my front left control arm.

It looks like it could be coming from around the manifold.

just wondering your take on this. I'm setting up an appointment with the local nissan dealership tomorrow because I've done jsut about all i believe i can and the problems only seem to be getting progressively worse.

Now one other question... I could not find a single wreckers with a 240sx DOHC fuel rail for 91-94. So I pulled a fuel rail out of a 93 Altima, which I believe is still the KA24DE. I just want to make sure that this was safe.

Again, thanks for all your help


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[s3]
Posts: 722
Joined: Tue Sep 09, 2003 5:24 am

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You sure you're not leaking oil/coolant? It be best to find out what that "black fluid" is.

I am not too sure, but you might have a leaky head gasket and burning coolant/oil.

Good luck.

NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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is the fluid coming from the exhuast flange gasket? it sounds almost like your injectors are leaking still. The smoke your seeing is it so thick you cant see through it and it is cloud white very thick like a cloud. if it is it may be a coolant in combustion chamber prob.I am not sure if the altima and 240 rails are interchangable. The concern I have between the 2 is its seal abilitly along the manifold where the seat. if they dont seal right you will have a huge vaccum leak.

ss240
Posts: 127
Joined: Sat Aug 23, 2003 10:04 pm

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it looks like its coming out from around the manifold... not too sure how to check if its the exhaust flange gasket.

yes.. the smoke is blindingly white.. .can't see through it one bit..

i turned the key to the on position for about 10 seconds today and back to off... did this about 6 or 7 times to try and rid of any air in the lines.... engine started awesome... was running great on all four.... for about 6 or 7 seconds till it bogged right out and sounded like it was running on 1 cyl.

NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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have you checked your coolant? is it low or severly discolored? I am beginning to think you have a bad head gasket or some other form of coolant leak into the combustion chamber.

ss240
Posts: 127
Joined: Sat Aug 23, 2003 10:04 pm

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ahh ****... how much is that gonna run me :( :confused:

NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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not sure. I dont know what the labor is up there in canada. but down here they hit em up for around 8 hrs to r&r a cyl head. Thing is it's not all that common for nissans in general to blow a head gasket. So I am not sure its the head gasket thats your problem. You could be getting coolant in there from something else i.e. intake gasket. Check your engine oil for coolant contaimination,it would look like chocolate milk on the dipstick and the inside of your oil cap would look like that as well. also another way to check is pull the rad cap off and start it up. if when you gas it coolant sprays out that could be an indication of pressure getting in from the combustion chamber.

ss240
Posts: 127
Joined: Sat Aug 23, 2003 10:04 pm

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Checked the coolant levels and they seemed fine. Took out the oil dipstick and it looked relatively normal. No choclate milk anywhere :P

I took my oil cap off and I stuck my pinkin in as far as I could and found no trace of oil. Didn't get a chance to try taking the rad cap off cause the engine was too close to my brothers bike and if I got coolant all over that I would be dead.
NISTECH wrote:not sure. I dont know what the labor is up there in canada. but down here they hit em up for around 8 hrs to r&r a cyl head. Thing is it's not all that common for nissans in general to blow a head gasket. So I am not sure its the head gasket thats your problem. You could be getting coolant in there from something else i.e. intake gasket. Check your engine oil for coolant contaimination,it would look like chocolate milk on the dipstick and the inside of your oil cap would look like that as well. also another way to check is pull the rad cap off and start it up. if when you gas it coolant sprays out that could be an indication of pressure getting in from the combustion chamber.

NISTECH
Posts: 10585
Joined: Sun May 25, 2003 4:17 am

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well you have some sort of fluid getting in the combustion chamber hence the smoke. If it were fuel vapor it would be transparent. the black fluid you seen by your control arm, you say it appeared to be from the exhaust. That I am guessing is the fluid going through and dripping from the flange gasket of the exhaust. The reason its black is due to the carbon in the intake and manifold. The fluid is essencially washing it off when its pushed through. Since the car will start I dont think your injectors are doing the flooding otherwise when you operated the key 6 or 7 times before starting you would of either hydrolocked or had a very difficult time getting it to run. did you pull the radiator cap at all to see if the fluid level in the radiator was correct? Don't go by the overflow bottle if the system has a leak it will draw from the leak before it will draw coolant from the bottle since its easier to draw air then fluid.

ss240
Posts: 127
Joined: Sat Aug 23, 2003 10:04 pm

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I pulled the rad cap and the fluid was right at the top... I'm guessing my next step ... would be to take it to a mechanic? Hopefully it is not the head gasket... maybe just an exhaust flange gasket...

Again, as always, I thank you so much for all your wisdom and support NISTECH...

Like I said, I can put my finger in the end of my muffler and gather black fluid... I'm guessing its coolant, cept I have yet to find anything discoloured fluids in my rad or oil.

Looks like all 4 cylinders are running again... I didn't change the o-rings on the injector... I inspected it thoroughly and then cleaned it with oil and a q-tip and lubed it up with some engine oil.

I hope its nothing huge cause ever since i've had my 240 it has been constant problems. But like i said ... thank you for all you help nistech and everyone else who have contributed to my posts and the rest of the board.


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