Sr = stooopid! Boosts when It feels like It

[spiderlone]

My friend has a sr20det black top s13. Side mount,wb fuel pump. 3"inch exhaust and a boost controller. He wanted me to turn up the boost so I turned It up to 12. The guy doesn't know much about cars at all. or how to even drive a turbo car properly. couple days later he calls me and says it stopped boosting and It was smoking. So I go check It out. There Isn't any blow by or smoke coming from oil cap.

I compression checked the engine It had 145 all across. so I changed his turbo with another good doner. I disconnected his boost controller and we took It for a test run. It ran fine boosted 8psi. felt nice and healty. We stopped. and behind Is a huge cloud of smoke (the same thing It was doing with the other turbo). so we wait and It goes away. we boost check again, stop and boom more smoke.

What could this be??!?!?!? Compression on engine Is 145 all across. no blow by. no smoke at a idle or driving. the smoke only comes after hard boost. Could It be something wrong In the head? bad valves? valve stem seals? Maybe leaky head gasket?

[blksylv]

wat color smoke?

[Couped_up'd]

Check you oil for milky-ness.

[spiderlone]

Its white smoke. I've check the oil cap for milkshake and Its all good. The car doesn't overheat or run funny at all. It just smokes after boost and doesn't boost sometimes. the car holds a perfect idle at 900. motor doesn't shake or anything

[JDMClifford]

sounds like your oil seal in your turbos. its a common problem. happened to me on my first sr.

[renegade_ewok]

I blew my HG and after random startups it would just billow but it still made good power, etc etc... HG doesn't necessarily mean that the power starts dropping off drastically right away.

If you changed the turbo there is only one other place in a car that has the capability to burn something and thats inside the engine. Blue or white smoke?

[slider2828]

If you are losing oil or a lot of water and don't get milkiness then you are fine. You can even try leak down, but like I said if you don't have those two conditions, its fine.....

White smoke is water, not oil.... Might have blown a WATER seal on the turbo.... buying use shit will get you a WHOLE LOT of problems. Get a new turbo, but overall here is the condition that is 80% turbo is if you boost hard, when you BOOST, it runs fine, but when you let go of the gas, the smoke appears, its your turbo....

[slidewaysmn]

Hrmm..sounds like your turbo....Was it a manual boost controller? I imagine your friend turned it up more..and it probably spiked at like 25 and blew yo shyt.

[Mesarina]

check if there are any obstruccions on the oil return line of the turbo

[spiderlone]

Naw Its all my friends car. He finally told me he was messing with the controller. I'm assuming he fuxed something up. The turbo I replaced on the car came from my old sr and It was running fine. I'm gonna leak down test It next. He doesn't know much of anything about cars which Is why I'm doin all his work.

I haven't heard anything from him so Idk whats the condition of It. If Its still smoking or not boosting

[slider2828]

^^^ With friends like that.... who cares.... you aren't a free mechanic that he blows shit up and then asks you to figure out whats wrong.....

[avs0730]

does it loses boost on top. check the intake tube to the turbo it could be collapsing under boost.

[Finelinetuning]

Piston rings are done

[DALAZ_68]

Piston rings are done

i would go with wat this guy says.... :wiggle:

[spiderlone]

Piston rings are done

Thats what I said but with the compression at 145 all across It says different. Unless Its the oil ring. usually piston rings It would smoke constantly and the engine wouldn't run all smooth? I've blown out rings before and Its constant smoke. This car only smokes after It boosts, It smokes and then just stops.

[slider2828]

That is turbo for sure....

[ILoveMyRHS13]

I vote turbo seals.

12lbs is stock boost, for the record.