7000 RPM Grey Smoke??? No start

ONLY for ADVANCED technical discussion about the 240sx!
KGB
Posts: 57
Joined: Mon Oct 08, 2007 8:03 pm
Car: 1989 Nissan 240sx & 2007 Ninja 650r

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So heres what happened, and I got the answer to one part already, I should have stuck with my "Nobody drives this car but me!" motto. I let my brother borrow my car. Early last month I get a call from my sister in law saying that the car is driving weird, says that its reving at 4-5 rpm (automatic) I agree and Im worried. I goto school at wyotech which is just down the street from her in sacramento. I say ill check it out either after class or before class the next day. Next day comes brother calls me. He on the way to work in Yuba City he getting high revs also and is worried. He wants to do an oil change which he does and I tell him have the guys look at the transmission also. they didnt have time for the transmission. On the way back he is going an overpass and revs up to 7000 in an automatic. No overheating he says. He wants to pull over but he cant so decides to climb to get past the overpass and pull over and get help. He doesnt even make the pass and grey smoke billowing out of the hood. The only thing I had wrong when I gave him the keys: 1 gear slipped. Other than that it was a great car. I look at it the next day, coolant all over the passenger fender upper radiator hose is cut in half clean, it looks like someone made a cut out of a radiator hose. checked oil, and it looked good. Tried to turn over but it didnt want to, One or two pistons made top dead center and it quit. Any ideas? Cause he thinks he blew up my engine, and like in the tv show "House" Id like to what under the hood would make this happen, how and maybe a why.


sjrose247
Posts: 25
Joined: Thu May 28, 2009 3:28 pm

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What year and everything is your car?

What gear was slipping before you gave it to him and how? just elaborate for me if you could

by revving im assuming you mean that you hit the gas and it acts like a stall on a torque converter reving up then taking off correct? and did you check the trans fluid? how does it look and smell?

the grey smoke im willing to bet was coolant getting everywhere and it was white smoke (just a guess) if you had a cut that size in the hose its a good bet you burnt some of that coolant on the exhaust.

liquid_cool
Posts: 1700
Joined: Sat Jul 05, 2008 3:02 am
Car: 1990 Nissan 240SX KA24DE-T swap 8.6:1cr, duelsprings, ti retainers,supertech pistons, K1 H-beems balanced internals ect ect

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im betting your torque converter was going out..or the transmission was not bolted to the block corectly and you had a flexing issue.....to sum it up....the people driving YOUR car dint give a s***z about it..and they reved the hell out of it even thou they knew it had issues..its 100% possible..they over reved your engine with a failed converter..and dropped a valve or broke a crank..you need to dismantle the block and look at it bit by bit to see if its salvagable...do this before you check the transmission...if ya dont have a block..they transmission would be useless anyways..so start there and get back to us.,

Bongpain
Posts: 89
Joined: Tue Feb 01, 2005 3:53 pm
Car: 92 240sx

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well first of all you go to wyotech. any of those teacher can look at it and tell you exactly what is wrong. but still it sound like you have multiple problem. first your car is already slipping what can cause that is internal trans problem and when you lend it out, that person might have driven a longer period of time then you normally do and the trans got hot plus combination with contamination from the slipping trans that you already have. which can be a piece of metal or a clutch ban or something this will block an oil passage of sorts and the trans just crap to bed. SORRY for your lost, but its not really his fault.

KGB
Posts: 57
Joined: Mon Oct 08, 2007 8:03 pm
Car: 1989 Nissan 240sx & 2007 Ninja 650r

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the transmission fluid was recently changed and would slip on 1 going to 2. Hopefully I can get to the bottom of this, if not then Im going for a 94 KA24DE with manual transmission. Also going to check the frame make sure its straightend out from a accident I was in. So yeah it does suck but I have been waiting for an opportunity like this to really work on my car

ARZ
Posts: 10
Joined: Mon Dec 15, 2008 6:41 am
Car: 1971 Datsun 240Z 7MGTE, 1970 Datsun 240Z 2JZGTE, 1988 Supra 7MGTE, 93 Nissan PU
Contact:

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Dude, if you don't answer anybody's questions, you will get NO HELP quick! That's why you got all these quality answers. LOL.

You answered one of sjrose's questions, (which tells us NOTHING)

liquid_cool has your car already completely diagnosed,

and Bongpain says its your fault, which it kinda is if you lent a car with known problems to someone that's going to drive it like a rental (not saying they are going to drive it like "I" drive a rental, just saying they probably turned the key and DROVE it and didn't pay attention to any of the gauges).

Then they gave you a JDA story.

So all your info about what ACTUALLY happened during the event is second hand.

How about as many of the facts as you can think of and then we can help.

Did you turn the motor over with the starter or with a wrench?

How do you know it was 1 or 2 pistons made TDC?

Man there are WAY to many question not answered.

GOOD LUCK.

And then you tell us it was in an accident, possibly bad enough to bend the frame. Sounds like it was "perfect" when you lent it out. LOL.

Bongpain
Posts: 89
Joined: Tue Feb 01, 2005 3:53 pm
Car: 92 240sx

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well you are correct ARZ. but he didn't really come here for an exact answer just stress relief. HE don't want to blame the problem solely on his brother in-law he is just lost and want to take advantage of the situation of upgrading his car and his brother may have offered some or all help and he may feel guilty about it. i don't know; and i just told him that his trans will have gone soon regardless of who was driving. just happen to be someone else; and i did not say his brother in-law drove it like a rental but said that he could have been driving it longer in distance than he the owner would normally have been or up a HILL where it die. that the owner may have never gone up that same hill before. and that may have caused a failure. but i none the less. GOOD LUCK on your new build KGB.

Bongpain
Posts: 89
Joined: Tue Feb 01, 2005 3:53 pm
Car: 92 240sx

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KGB wrote:the transmission fluid was recently changed and would slip on 1 going to 2. Hopefully I can get to the bottom of this, if not then Im going for a 94 KA24DE with manual transmission. Also going to check the frame make sure its straightend out from a accident I was in. So yeah it does suck but I have been waiting for an opportunity like this to really work on my car
well from experience many independent shop only drop down the pan and change the filter. you may still have stuff inside your torque converter and/or cooler. i myself do a full system flush. which flush out about 12 quarts of fluids multiple time back flushing and forward. this you need a special equipment that many shop don't have. buy anyways. you don't need to worry about that when you do the swap. just don't for get to drain and put in new synthetic gear oil in you new transmission. and do it at the rear also since you are right there. GOOD LUCK

sjrose247
Posts: 25
Joined: Thu May 28, 2009 3:28 pm

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ok if you want to kow my opinion i dont think its the torque converter since it only occurs on the 1-2 shift i looked at the service manual for the s13 since thats the one that i have if that is the case then im guessing there is a problem with the 2nd gear band apply servo or that circuit.

When it shifts into 2nd gear trans fluid is applied to the engage the band shift to 2nd (this is the only change from 1st to 2nd in the trans) then when it shifts to 3rd fluid pressure is applied to the OTHER side of the servo releasing the band then going into 4th, 4th gear pressure is applied to the pressure that already exists on the 2nd apply side of the servo engaging the band again

Now that that is over best bet is wait for your 5 speed unless you wanted to get it rebuilt because that is the only way youll know for sure what it is. enjoy figuring it out!

Hope you enjoy the Wyotech thing, thought about that back in high school, but ended up going against it

BrianV8
Posts: 14
Joined: Mon Jun 01, 2009 8:12 pm
Car: 89 Skyline GTS

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time for that 5 speed swap :P


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