How do I know when my turbos blown

[midnight180sx]

I have a 89 240sx with a s14 sr20det.Iwas driving it down the road when it started hesitaiting around time of boost.When it revs it wont even boost now I can't even get it started.

[SpeedRacer1]

You know its blown when the compressor wheel stops turning when you try to turn it by hand. Or if large amounts of oil are leaking, but the oil seals will not affect performance.

[IanS]

I have a 89 240sx with a s14 sr20det.Iwas driving it down the road when it started hesitaiting around time of boost.When it revs it wont even boost now I can't even get it started.

sounds like a differant problem, like a boost leak or bad mafs

[redtop91]

No the turbo is blown. The bearing has probably crapped out because of starvation. Do you hear a ticking noise while you are driving? My T25 is currently doing the same thing. OP. Take a look at the turbo like speedracer said. If you see large amounts of oil on the turbo then you have a blown seal like me. At which point it is either rebuild or replacement time. Look into ATP Turbo for rebuild parts.

[midnight180sx]

The turbo still spins by hand and I don't see any oil in it.where should I check for the boost leak and how should I check the MAFs.Is there a high chance of a coil going out also I need a vac diagram for the s14 sr20det.

[jspek]

does the turbo have mass amounts of shaft play? my seal went and it moved horizontally a good amount. plus i was burning like a quart of oil every 100 miles. for the maf i believe you want to check the voltage readings? dont quote me on that. if you had a bad coil pack the car would sound like a wrx or sti.

[dcmxsa]

Maybe one or two of the bolts that holds your turbo onto the manifold flange is coming loose. thats what happen to mine a few weeks ago, and it was making a similar problem like yours.

[midnight180sx]

the bolts on the turbo manifold seem tight.I just replaced the manifold a couple moths ago and it doesn't sound like there is a exhaust leak.I can't even get the car to start now so I'm checking in to a MAFs.

[midnight180sx]

the turbo shaft doesn't have any ply in it and its not burning oil.I'm thinking its not the turbo so I don't know what the hell it is.

[eliterit]

im thinking boost leak

[midnight180sx]

Just got my z32 MAF today so hopefully that will fix the problem.As far as boost leaks I've been looking every where but can't find one.Also will a bad MAF keep the car from starting.

[IanS]

what are you using to control the new MAF?

[midnight180sx]

Nothing as of right now what should I use.

[killablue240]

check to see if you have spark and fuel first.

[elgarvo616]

your car isnt going to run until to get something to control that Z32 MAF.

[midnight180sx]

also changed the fuel ump and the car started but its still having the same problem as before.When I get into the throttle it bogs down its boosting but not very well.

[xyoobxyoob]

my car is doing the excat same thing, and i havent been able to drive it ever since, mine stays on but the idle is really rough and it does not want to boost at all, i replaced the MAF but still running crappy,

[IanS]

also changed the fuel ump and the car started but its still having the same problem as before.When I get into the throttle it bogs down its boosting but not very well.

you cant use a Z32 maf without either an SAFC, a standalone, or an ecu retune,

lets start over from the begining

everyone is just throwing out answers and we arent getting anywhere

list what the symtoms are, be as dicriptive as possible, anything odd that you have noticed, smoke, odd smells, wierd noises.

could you give us a list of your mods, and any other info about the car, like how long have you owned it, and did you do the swap yourself?

we can figure this out

[midnight180sx]

I have owned the car for a year and a half.Swap has been done and drivable for about 4 months.The mods are a greedy FMIC kit, greedy type RS BOV, greedy hot pipe,greedy down pipe,apex N1 cat back,apex power intake, MR tubular exhuast manifold,and vineston high flow radiaitor with dual electric fans.The symptoms are when I'm driving or even sitting and just reving if I get into the throttle to much the car bogs down it wont rev past where its at but if I'm easy with the throttle it seems to rev up and not bog down.The hot pipe that I have doesn't have a nipple for the wastegate so I have been trying to run it off the throttle body but isn't working.After I shift gears it sounds like air is getting sent back out the intake off the turbo.

[IanS]

in my experience running a wastgate off MAP (manifold absolute pressure) the vacuum will usually cause the wastegate actuator to fail,

have you noticed any smoke while revving or driving, black blue or white?

you can check for boost leaks with the car off by capping the end of your hotpipe and blowing air into the system using the nipple on the bottom of the throttle body, its a direct boost source, you could also use this nipple to run your wastegate, although not as good as a hotpipe nipple because it is so far from the wastgate, it is better than using MAP

what kind of spark plugs are you running, it is a good idea to check your spark plugs and spark plug gap, what condition are they in, black, white, oily? Gap for your setup should be about .030 to .032, also with the plugs off check the condition of the boots on the coilpacks, and make sure the springs that are inside them are the way they should be

also, are you recirculating your bov

ps. its spell Greddy, not greedydont worry I wont tell anyone

[theclub]

When you get beat by a honda civic.

[midnight180sx]

On the s14 sr20det all of the vaccum nipples are on the bottom of the throttle body so I'm not sure which one your talking about.For sprk plugs I'm running denso iridiums gapped to .032 they are only a couple months old and they look fine.I don't see any smoke coming out of the car it idles fine its just under heavy throttle it bogs down.

[IanS]

Im not sure about the s14, I have an S13 SR and there is an extra nipple on the bottom of the throttle body that nobody uses for anything. You should try finding a nipple to weld onto your hotpipe, you can use it for your wastgate and for boost leak testing.

[midnight180sx]

Among the nipples on the throttle body there is one that is capped off and came like this could that be a pressure one

[Bierbaumer]

i'm a noob,

but what you describe sounds like your car is either getting too much air or fuel.i had that problem with my bike...idle is fine, slightly stepping on as well,but as soon as you floor it, it goes down.

can you messure the exhaust gas fuel air ratio?

don't want to bother anyone, is just what i think.

[IanS]

Among the nipples on the throttle body there is one that is capped off and came like this could that be a pressure one

its possible, if you pull off your coldpipe you should be able to see if it is befor or after the throttle plate.