eargent.....

Started by yhave8, 08:12:20 PM / 02-Sep-05

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yhave8

08:12:20 PM / 02-Sep-05
HI Im new to club s12 And a new owner of a1985 200sx turbo. I have a problem when I first go down the road it seems to be fine but when it gets hot it backfires under the hood and misses the only way to make it stop is to go full trottle and the turbo makes a very high wine sound and the turbo gets so hot that it melts stuff under the hood but it is barley boosting it is in the middle of the boost gauge in between the -5 and the +5 and want move. It goes to the shop tuesday the 6 and I dont know whats wrong please help.

TheXev

#1
12:07:40 AM / 03-Sep-05
If the turbo is getting that hot, it may not be getting a good oil flow.  It could also be that the turbo is in need of a rebuild, but Iââ,¬â,,¢d check the oil lines going to it first and make sure its flowing? How many miles are on your car? And has the oil been changed recently? Itââ,¬â,,¢s possible that dirty oil that hasnââ,¬â,,¢t been changed in too long is clogging the turbos oil lines.

If the boost is low, it could be the turbo is damaged, or has been damaged as a result of extended ware without proper cooling.  As difficult as it is, you may have to pull the thing out and/or rebuild it.

Itââ,¬â,,¢s obvious that the backfiring is probably being caused by the turbo under boosting though.  The engine is more then likely mixing to much fuel into the engine because the turbo would normally be boosting more.  Iââ,¬â,,¢m sure the shop will get to the bottom of it.  Whatever the issue is, I doubt itââ,¬â,,¢ll be pretty.
TheXev
Revolve Translations

1985 Nissan 200SX CA18ET - Sold
1988 Nissan 200SX CA20E - Sold
1991 Infiniti M30 VG30E - Daily Driver

Keith

#2
12:53:30 AM / 03-Sep-05
check the coupler that connects from the compressor housing outlet to the cross over pipe.  If there is a big enough boost leak there....it will idle and cruise fine...but when you start to boost, it won\'t boost much past 0, the turbo will have a loud whine, and it will buck and kick when trying to do so......all symptoms you describe.  If the stock orange silicone coupler is on there......they\'re crap, and split easily.  You may have to take off the cross over pipe to visually see a split in it.......but my bets are, this is your problem.
Same thing has happened to me several times over the years.....until I got wise and started using a different silicone coupler.



*1984 S12 Turbo* CA18DET swap * Custom top mount header & dump pipe * Mitsu Heavy Industries EVO III 16g turbo * Custom 3" turbo back exhaust with Magnaflow muffler * Front mount intercooler * Front mount oil cooler * Nismo fuel pressure regulator * Walbro 255 * DSM 450cc Injestors * Apexi Safc II * AEM Wide Band * AEM Tru Boost * Z32 MAF * Cometic head gasket * Centerforce Dual Friction clutch *  Tokico lowering springs * Owned since 1989 *

*2007 BMW M6* S85 V10 sweetness

*2004 C5 Z06*

*2006 BMW E60 550i Sport* Boner stock; SOLD *

*1995 Maxima* Owned since 1995 SOLD

Car Domain

yhave8

#3
01:22:13 AM / 03-Sep-05
The car has been sitting for about 9years with out being started so as soon as I got the car I changed the oil & filter pluse spark plugs plug wires desribiter cap and rotor button and the car has 150,000 miles own it.If I buy a new turbo do you think it will fix the problem?And how can I tell if oil is making it to the turbo?

Keith

#4
01:34:19 AM / 03-Sep-05
QuoteIf I buy a new turbo do you think it will fix the problem?
before you waste money on a new turbo.....check the old one to see if it\'s still good.....because I think your problem is what I mentioned above.  If not, thats a good place to start.
To check the turbo.....take off the accordian intake pipe  from between the air flow meter, and turbo compressor inlet.....and reach in and see if the compressor wheel spins freely.....and also check for shaft play by grasping the nut in the center of the wheel.....and push and pull it.  There shouldn\'t be any movt.  Also move it side to side.  A little play is normal.



*1984 S12 Turbo* CA18DET swap * Custom top mount header & dump pipe * Mitsu Heavy Industries EVO III 16g turbo * Custom 3" turbo back exhaust with Magnaflow muffler * Front mount intercooler * Front mount oil cooler * Nismo fuel pressure regulator * Walbro 255 * DSM 450cc Injestors * Apexi Safc II * AEM Wide Band * AEM Tru Boost * Z32 MAF * Cometic head gasket * Centerforce Dual Friction clutch *  Tokico lowering springs * Owned since 1989 *

*2007 BMW M6* S85 V10 sweetness

*2004 C5 Z06*

*2006 BMW E60 550i Sport* Boner stock; SOLD *

*1995 Maxima* Owned since 1995 SOLD

Car Domain

yhave8

#5
01:57:55 AM / 03-Sep-05
I did that the other day because I had to replace the turbo gasket it did not have much play but I noticed when I spun it that it would spin for a little bit but then it would stop suddenly and I would aply more force than normal to get it going again.And what you said about the cupler will that cause it to get paint melting hot?

Keith

#6
10:13:43 AM / 03-Sep-05
well...........if the wheel is binding when you spin it, then it sounds like your turbo IS on it\'s last leg.



*1984 S12 Turbo* CA18DET swap * Custom top mount header & dump pipe * Mitsu Heavy Industries EVO III 16g turbo * Custom 3" turbo back exhaust with Magnaflow muffler * Front mount intercooler * Front mount oil cooler * Nismo fuel pressure regulator * Walbro 255 * DSM 450cc Injestors * Apexi Safc II * AEM Wide Band * AEM Tru Boost * Z32 MAF * Cometic head gasket * Centerforce Dual Friction clutch *  Tokico lowering springs * Owned since 1989 *

*2007 BMW M6* S85 V10 sweetness

*2004 C5 Z06*

*2006 BMW E60 550i Sport* Boner stock; SOLD *

*1995 Maxima* Owned since 1995 SOLD

Car Domain

yhave8

#7
04:14:13 PM / 03-Sep-05
How can I make sure the turbo is getting oil to it.?

drift_addict

#8
04:59:30 PM / 03-Sep-05
Make sure the lines are clear and you can take apart the turbo itself to insure that it is getting lubrication. Sounds like the turbo is about to go kaputt on you for sure, I would just look for a new one or maybe...oh I dunno, slap a T25 on there! ;)

Indecisive

#9
05:13:26 PM / 03-Sep-05
pfft to your T25 idea...

GT28RS heh
Quote
"I'm fairly sure that if they took porn off the internet, there'd only be one website left, and it'd be called 'bring back the porn'"

Keith

#10
11:07:17 PM / 03-Sep-05
QuoteHow can I make sure the turbo is getting oil to it.?
you can take off the oil return hose that hooks to the oil pan....it should be lined with a bit of oil



*1984 S12 Turbo* CA18DET swap * Custom top mount header & dump pipe * Mitsu Heavy Industries EVO III 16g turbo * Custom 3" turbo back exhaust with Magnaflow muffler * Front mount intercooler * Front mount oil cooler * Nismo fuel pressure regulator * Walbro 255 * DSM 450cc Injestors * Apexi Safc II * AEM Wide Band * AEM Tru Boost * Z32 MAF * Cometic head gasket * Centerforce Dual Friction clutch *  Tokico lowering springs * Owned since 1989 *

*2007 BMW M6* S85 V10 sweetness

*2004 C5 Z06*

*2006 BMW E60 550i Sport* Boner stock; SOLD *

*1995 Maxima* Owned since 1995 SOLD

Car Domain

yhave8

#11
03:25:24 PM / 04-Sep-05
A couple of ? will a t25 bolt diretly on ther with no help such as oil lines and tread size will it srew right in? And my motor it sounds great with no smoke or anything but it dose have 150,000 miles on it will it handle a t25 with no worries.If it will thats the way I will go instead of putting it into the shop.

Cavi Mike

#12
04:25:11 PM / 04-Sep-05
It needs an ECU.
http://www.myspace.com/cavimike

------------------------
All Cars Would Be Yellow If Not for the Matchy-Matchy Laws
Teacher: So, as you can see, this car in the picture reduces air resistance and can accelerate faster.
Student #1, chuckling: Yeah, and plus, it's yellow, so that makes it faster, too.
Teacher, laughing: Haha, yeah, very true.
Student #2: Wait, really?

--Physics class, St. Ann's School

Overheard by: Mike N
------------------------

yhave8

#13
06:11:30 PM / 04-Sep-05
What kind of ecu what

Cavi Mike

#14
08:02:21 AM / 05-Sep-05
What? The Electronic Control Unit. There\'s nothing more to it. Not an ECU brace, ECU line, ECU bearing or ECU grease, just ECU. It needs an ECU. And you\'re going to, or already did, blow your seals in your turbo from trying to drive it in this condition. Basically, after you replace your ECU, it will run fine but blow some blue smoke.

If you didn\'t know what an ECU is, you shouldn\'t be thinking about swapping a turbo on anything. Stick around here for a little while longer and get more familiarized with your car before doing any major modifications.
http://www.myspace.com/cavimike

------------------------
All Cars Would Be Yellow If Not for the Matchy-Matchy Laws
Teacher: So, as you can see, this car in the picture reduces air resistance and can accelerate faster.
Student #1, chuckling: Yeah, and plus, it's yellow, so that makes it faster, too.
Teacher, laughing: Haha, yeah, very true.
Student #2: Wait, really?

--Physics class, St. Ann's School

Overheard by: Mike N
------------------------

Ricochet

#15
08:22:38 AM / 05-Sep-05
Urgent
T25\'s go for nothing on Ebay, start looking.

yhave8

#16
10:40:12 AM / 05-Sep-05
I no what a ecu is I just meant what do I need to do to it such as chip it or just upgrade Ive done motor swaps my hole life unfortunely it has all been hondas & no turbos But after finding my s12 my new love is nissan.I just dont no much about nissans or turbos yet but im learning.
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