Brand new turbo does not spool after 80miles

[Maxstyle]

I bought a brand new nissan S15 turbo. Now it won't spool. It's been working fine. I've only driven it 3 times in the past 2 weeks. Sucker just chooses not to spool this morning. Not understanding. Any Ideas? No Exhaust leaks. Drives like a smooth, no power NA.

[posdrift240]

Internal or External wastegate?

[Maxstyle]

Brand new S15 internal T28 brand new from Nissan through reputable shop.

[txrxs]

Blow off valve leaking?

Need more details on your cars setup.

[Maxstyle]

No leaks. Running HKS SSQV. No MAF (HKS VPC), FMIC, IC Piping seems to be in order. Exhaust has not leaks. Purchased all new Nissan origial nuts, studs and locking tabs.

[posdrift240]

Check for a tear in your couplers! If you do not see any then you better be taking the turbo back off an inspecting it.

[91silvia]

^^^what he said. Check your IC piping for any couplers that are blown off or leaking.

[sean350z]

Might want to pressure check the internal wastegate to make sure it's closing.

[txrxs]

I had the same problem and I'm also running that piece of shit VPC. Double check your intercooler piping and couplers. Unlike MAF cars, VPC allows the car to run fine with a pipe off or leaking really bad.

[Maxstyle]

I had the same problem and I'm also running that piece of shit VPC. Double check your intercooler piping and couplers. Unlike MAF cars, VPC allows the car to run fine with a pipe off or leaking really bad.

I thank you for your input. I do not appriciate the "piece of shit" comment. The VPC coupled with the GCC is one of the best tunning units for my setup. Anything else would just be over-kill. I don't need anything more and the car has run perfectly. I'll check it out a bit more tonight. Sucks that I have to be here at work instead of in my garage.

[KA-T_240]

make a boost leak tester out of PVC pipe and a fitting. hook that up to a air tank, slowly put more and more air in the system. You well hear the leaks(mostly wistles)

Also, take of your IC pipes and make sure your turbo is still spinning and that there is no oil in the charge pipes. Does your turbo make funny noises?

[Maxstyle]

Turbo is silent. Dead silent. That's what makes me nervous.

[McRussellPants]

C-clip on the wastegate actuator fell off and now the wastegate is perma open.

[johngriff]

Why don't you just take the intake off and check the shaft??

[Maxstyle]

I will. This tread is just to help me formulate a checklist to make sure i don't miss anything when looking at it after work. Things like the clip, will all be checked out during lunch

[GSXRJJordan]

My bet it a blown/torn intercooler coupling. If you had a MAF, you'd notice the car running like shit, but since you're running the VPC it will still run fine.

Even if the wastegate was stuck full open, he'd hear a little spool...

[!Zar!]

It's a trick.

Your car doesn't have turbo at all.

I win.

[Maxstyle]

^ you = the fail. JK. I miss boost.

[steve shadows]

most HKS electronics are pieces of shit.

At least in my experience.

Did you have the proper oil restrictor in line?

You might have siezed the CHRA.

The new Garrett GT turbos come with built in restrictors.

You might have gotten an older shevled nissan oem one.

not sure. might be worth checking into.

Have to checked with your bare hands to see if it is seized?

[KA-T_240]

^yup. I do not think people posting stuff up here is going to help you. You need to go and physically examine the turbo and make sure its good.

Even if you had loose couplers or a major leak, you should still get some boost even 1-2 psi, unless you are missing a pipe or something like that. You would also be able to hear the turbo.

[Maxstyle]

After installing new turbo and adding a few miles, Turbo needs to be retightened. I was an aware of that proc. and seem to have a large exhaust leak. Thanks so much for everyone's help.

[Def]

The "turbo needs to be retightened?" I'm guessing you're talking about the turbine to manifold bolts? Wouldn't you hear an exhaust leak that loud?

[Maxstyle]

Not loud. pulling it off tonight now that i finally have a chance.

[GSXRJJordan]

If you use the locking tabs correctly, and use OEM (locking) manifold->head nuts, it shouldn't loosen. None of the T-bolts/hose clamps should loosen... I'm confused as to what came loose.

Good luck getting it all to go together and stay together :)

[steve shadows]

yeah don't waste your money or time on thread lock

used tabs only

[s14alex]

yeah don't waste your money or time on thread lock

used tabs only

Yea :rant2:

I have to fix mine now constantly :(

[Maxstyle]

Got the tabs. All is well. thanks to all

[reccakun08]

are you using locking nuts as well? new studs?

[GSXRJJordan]

are you using locking nuts as well? new studs?

Doesn't matter if you use locking nuts or not, the nylon melts and the vibration loosens the nuts. For the record, new studs from a hardware store are often not of the same harness (OEM studs are '8' IIRC), and sometimes not better at all.

/threadlock plz.

[blu808]

honestly I tack weld all the nuts on the turbo.