help! maybe serious problems with sr20det

[mynameisjonas]

i've been working on my sr20det swap since christmas time and i just can't get it running right. my biggest problem is it shoots alot of oil out of the blow off valve. i thought it was my turbo so i called the place i got my engine and they sent me a different turbo which looks in good shape with no shaft play , spins freely etc. i put that one in and it still shoots lots of oil! it also runs like crap. it hesitates and won't let me get into power. i have an o2 sensor from a 87 300zx turbo which i'm wondering if i hooked that up right or not and if that's causing it to run crappy. i really need all the help i can get, i'm getting sick of this i just need it to run. oh i also have a greddy catch can tank so it's not from blowby or whatever.

[mynameisjonas]

is my catch can hooked up correctly/ in the right spot? (bottom left corner to the blow by hose)

[mynameisjonas]

i've seen other setups with the catch can on this side, hooked up to the t on the valve cover. the greddy kit said to do it on the other side. which one is right?

[mynameisjonas]

this is a picture of the o2 sensor connector. the wire colors do not match up at all. is this right?

[Morph]

I dont have my O2 sensor hooked up and mine runs great. So i dont imagine that its your prob. Did you swap it your self?

[mynameisjonas]

maybe i'll try disconnecting it and seeing if it runs any better. yeah i did the whole swap myself. it's been kindof a frustrating journey but i am learning a lot.

[mynameisjonas]

it doesn't run any better without my o2 sensor. it hesitates all over the rpm range but it almost cuts over about 2500 rpm. could it be a maf problem maybe?

[TS4L]

It really sounds like a MAFS problem, Which MAFS are you running???

[robbbby]

is my catch can hooked up correctly/ in the right spot? (bottom left corner to the blow by hose)

That definately does NOT look right. First I have never seen it hooked up on that side like that. It is supposed to recirculate back into the intake. Where does your hose on the 'T'' on the other side of the valvecover go?

The line from the valvecover T on the right side should go into the catch can, then the other line of the catchcan should run back into the intake..

[mynameisjonas]

im using the SOHC MAFS. it's stock boost and everything. just downpipe exhaust intercooler upgrades that's all. if it's MAFS would it let me get over 2500rpm at all? or would it totally cut fuel? right now it lets me over 2500 but it just really cuts and hesitates won't let me get power.

[mynameisjonas]

like i said it's the greddy kit. i thought it went the other way too but the way it showed it and the fittings/hoses it came with won't fit that way. they're too small. has anybody used the greddy universal kit? robbbby could you post a picture of your setup?

[Def]

What that guy said. Your catch can is in the wrong spot, and you're MISSING your stock oil separator(which is why you're getting oil in your intake pipes). The catch can should go where the stock oil separator is. Look for pics of SR swaps - it's the black box looking thing on the back driver's side of the block(where you just have a straight rubber line). Plumb the other side of the can into the valve cover T, then from there go to the intake tract somewhere AFTER the MAF. The stock intake tube has a fitting just for this.

[mynameisjonas]

im using the SOHC MAFS. it's stock boost and everything. just downpipe exhaust intercooler upgrades that's all. if it's MAFS would it let me get over 2500rpm at all? or would it totally cut fuel? right now it lets me over 2500 but it just really cuts and hesitates won't let me get power.

anybody?

[nismostate]

do you know anybody else with an sr? try switching parts.

[Onizuka]

is my catch can hooked up correctly/ in the right spot? (bottom left corner to the blow by hose)

Thats probably part of the reason for your car running like crap

I have the same kit as you so you should be able to identify where the hose is:



If your valve cover T is not connected to the intake piping before the turbo then the oil is coming from your turbo, again.

[mynameisjonas]

no, unfortunately i don't know of anyone else closeby with one

[mynameisjonas]

lol i found out that my friend who i'm getting parts through ordered me the wrong catch can. he ordered the one with the 9mm fittings and hose instead of the 15mm fittings and hose, hence the reason i hooked it up where i did; that's where it would be with a N/A car. i'll hook it up when i get the right fittings. my concern is still about excessive blowby. i'll have to empty the catch can every couple days probably! so my question remains; what could cause that excess blowby oil?

[wanna.be.fast]

Most likely caused by where you had the catch can hooked up. Hook it up in the proper place and everything should be ok

[Luke]

[mynameisjonas]

a catch can is basically just a safety for a little amount of oil coming by. what you're saying is just covering up the problem of excessive oil. the oil has to be coming from somewhere!

i talked to a knowledgeable person yesterday about what was going on and right away he said piston rings. so i'm going to do another compression test on it. he also gave me an easy indication to see if rings are bad. while the car is idleing take out the oil dipstick and cover the hole with your finger. if you hear a gurgling like sound then most likely rings are bad.

i'll let you guys know what i find.

[mynameisjonas]

i did the dipstick test and i couldn't really hear anything because the engine was too loud but i also did a compression test. as i was taking out the #4 cylinder spark plug i noticed oil on the plug. sure enough cylinder 4 compression was only at 30 psi while all the others were between 120 and 140. i put a little oil down the spark plug hole and did the test again on that cylinder and the compression went up to 50 right away, which indicates that the piston ring and/or piston is bad.so i called the place where i got it and they want a mechanic to write a letter stating what was found to verify what i found. so i don't know what's gonna happen now. whatever happens i guess the engine has to come out anyway