My SR is f**ked, please help!!!!!

[HailtotheSilvia]

Oil smells like gas, runs like ***, it ain't even fast,!! WTF!?

I installed my SR a month ago, did the break in period and everything and the motor ran fine for a few weeks until last week.

I was riding down the road last week (boosting) and heard loud *** poppin noise then my car started to run like a$$ (bogged real bad, won't boost, won't rev). I took it apart the next day to find out that the AIV plug is missing so I plugged it back up. I started it back up and it ran ok (still bogged sometime but not as bad...drivable but running really rich) so i decided to drove it for a few days. Until a few days ago, my friend came over and told me that i should try and took out my 02 sensor and see how it runs. It ran a bit better until i decided to test boosted it again and heard another loud popping noise. I pulled over and my car died on the side of the road. This time the car won't even start without mashing on the throttle (seems like it's just dumping fuel and getting no air). If the throttle is let off...it'll die. All the Spark Plugs has been tested and they were fine, I pulled out the dipstick to check the oil, it was fine but i smell gas on the dipstick....wtf? I stated the motor up and try to test the injectors by unplugging them one by one and see how the motor reacts, injector 1-3 makes the car bog which is normal but when i unplugged #4 injector nothing happen.....

What could be the problems here guys??I apologize for posting such a long post but i'm really in a bind. Any kind of suggestions are appreciated

BTW, the motor is bone stock except for the exhaust mods (3" downpipe and Apex N1) and running stock boost

Peace and Thank you

[MainEvent212]

check your intercooler pipes...does it take alot of effort to keep the car alive once it's started? makes no power but is driveable as long as you keep revving...your intercooler is no longer hooked up and you're sucking air through a disconnected i/c pipe lol

[HailtotheSilvia]

yeah, once the car started, i have to keep giving it throttle or it will idle real crappy or just died out. My assumption at this point is that my exhaust manifold gasket is blown causing the turbo to not spool up and not getting air....could it be?

[HailtotheSilvia]

couple more questions guys..- how do i check intercooler for leak?- I think i need to perform a leak down test, what do it need and how?

[Nismo_Freak]

Make sure you got all the misc. holes on the intake pipe all plugged up.

[msaskin]

I'd bet with almost 100% certainty that you've a gash in one of your lower injector o-rings.

~matt

[HailtotheSilvia]

Thanks for the suggestions guys, but how would the gash on the o-ring and the intercooler explain why my dipstick smells like gas?

[HailtotheSilvia]

I would hate to think that my motor has bad piston rings or some sort of mess up compression cause I bought the motor from Heavy Throttle just a month ago......hoping that they send me a good motor...

[msaskin]

A gashed lower o-ring will cause fuel to leak into the intake manifold. If this excess fuel is getting forced into the cylinder (easy) and there is too much fuel to burn by combustion, the excess WILL run down the cylinder wall and into your oil.

The piston rings are meant to contain a substance with the viscosity of oil. Gas has a much lower viscosity (obviously)...it's just going to run right down the walls around the piston rings.

Trust me, check the o-rings, or at least drain your oil and see how much fluid (oil + gas/whatever) comes out. I'm telling you this only from experience

~matt

[ill_sil]

btw, you can check your i/c piping for leaks by spraying soapy water on every connection(coupling) and rev it.It will bubble up or make suds,and if you need to do a compression test call me ill bring the device.

-John

[Dookie]

haha, john's posting in the forum, welcome to the club man-Dan

[ill_sil]

thanks

[HailtotheSilvia]

A gashed lower o-ring will cause fuel to leak into the intake manifold. If this excess fuel is getting forced into the cylinder (easy) and there is too much fuel to burn by combustion, the excess WILL run down the cylinder wall and into your oil.

The piston rings are meant to contain a substance with the viscosity of oil. Gas has a much lower viscosity (obviously)...it's just going to run right down the walls around the piston rings.

Trust me, check the o-rings, or at least drain your oil and see how much fluid (oil + gas/whatever) comes out. I'm telling you this only from experience

~matt

THanks a lot Msaskin, i think this could be my problem...but how do i check for it? where's the lower o-ring? is it on the injector itself? and is it possible for the DIY er?
Modified by HailtotheSilvia at 7:39 PM 10/5/2004

[msaskin]

Just pull the injectors out. You'll see two o-rings on the injectors. You can take a small pick or precision screwdriver to remove them.

It'll be pretty obvious when you stretch the o-ring slightly with a pick if there is a split/gash/whatever in the ring.

~matt

[MainEvent212]

i'm tellin u bro, CHECK your i/c pipes before you bother w/ anything else...it's a VERY easy fix most of hte time...

[dj_lennon_franz]

i'm tellin u bro, CHECK your i/c pipes before you bother w/ anything else...it's a VERY easy fix most of hte time...

a leaky intercooler pipe would not cause a gas smell in your oil...it would be a problem with your fuel injectors or O rings leaking

[Fenvy]

just for visual reference, you can see 2 o rings on my injectors... that could be your problem

[HailtotheSilvia]

Thanks for the pic man, hopefully i have time to get to it this weekend. I'll let you guys know what's going on, thank you everyone for help

[MainEvent212]

from what i've heard, all turbo cars will havea slight gas smell in the oil...that is supposed to be normal, jsut because of the nature of a turbo car.

[Def]

A vacuum/boost leak could possibly cause that. Check your intercooler connections.

Basically what is happening is that as you rev it up and the turbo spools it will leak out of the boost leak and your engine will be seeing much less air than the MAF metered. It injects too much fuel for the air going in, causing a very rich AFR.

It could also be either a stuck injector or inj. o-ring like was mentioned. I'd start with inj. 4 since that one doesn't change things when you unplug it.

[msaskin]

[QUOTE=MainEvent212]from what i've heard, all turbo cars will havea slight gas smell in the oil...that is supposed to be normal, jsut because of the nature of a turbo car.[/QUOTEat

Uhhh, I don't know where you heard that, but you're wrong.

I've owned multiple turbocharged cars and tuned/worked on many more and have never had a gas smell to the oil unless something was seriously wrong.

~matt

[dj_lennon_franz]

from what i've heard, all turbo cars will havea slight gas smell in the oil...that is supposed to be normal, jsut because of the nature of a turbo car.[/QUOTEat

Uhhh, I don't know where you heard that, but you're wrong.

I've owned multiple turbocharged cars and tuned/worked on many more and have never had a gas smell to the oil unless something was seriously wrong.

~matt

once again supporting the theory that a leaky intercooler pipe would not cause your oil to have a gas smell

[msaskin]

once again supporting the theory that a leaky intercooler pipe would not cause your oil to have a gas smell

ehhh???

While I do say he needs to check his I/C piping first, usually issues with starting the car (such as needing to be at WOT to get it started) are indicative off too much fuel in the cyliners. A real bad intake leak would cause that, but usually only appears under power. I still stand by my injector theory, but yes, it could be either

~matt

[HailtotheSilvia]

hey guys, I finally got to work on my car this past weekend

I took out the injectors as Msaskin mentioned and the O rings were fine so i put everything back together. Check the intercooler piping and found the epoxy that I used to cap off the stock BOV location were missing. I plugged it back up and change the oil (since it smells like gas).

My car is drivable once again but still rev (boost) and idle like a$$. I test drove for about 5 mins, came back and check everything and found out that my oil smell like gas....AGAIN!! yes..it's getting annoying...

What could it be guys??? if not the o-rings and the piping??? could it be that my MAFS has gone bad? What is the best way for me to diagnose this problem? I live in Lafayette, Louisiana and there's no shop in this area that familiar with the SR, do you guys know of any place closest to this area where i can have my car diagnose???

Thanks guys

[msaskin]

Your somewhat shoddy piping is probably leaking once you get into boost. A leak will generally not show up under vacuum, only boost.

~matt

[180fan]

so you've got a crappy idle too eh? Have you check out the following parts:

MAFSTPSresistances across your coolant temp sensor, and injectors?hosed down your IACV with carb cleaner?check for vacuum leaks?