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Old 09-04-2002, 04:43 PM   #1
Impreza25RS
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1998 EJ22.5RS-T
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Default Some problems with MY98 RS-T

Picked up my RS-T on Monday which was very exciting, but Im running into a couple of problems off the bat. The car is burning oil pretty bad (lots of smoke coming out the exhaust) because the oil return line is not positioned correctly. Has anyone else ran into this problem. Its a FAT stage 2 kit by the way. Rallispec told me I could creatively use some fittings to reposition the line but Im really not sure how to do this? And my other problem is that sometimes my car randomly stalls out when slowing down for stoplights? Any ideas on either of the two?
Thanks for the help everyone?
Kyle
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Old 09-04-2002, 04:52 PM   #2
Mariano
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I had a similar problem on my 99RS-T. The hoses from the oil breathers were connected to the turbo intake; right after the MAF. Because of the strong sucking/vacuum effect from the turbine , oil was been sucked from the engine block and spitted back at the exhaust.

SOLUTION: CATCH CAN!!!

hope this helps,

saludos,

Mariano
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Old 09-04-2002, 07:00 PM   #3
SteveS
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Default

It could be because of the breather lines, but it is most likely due to the oil return line (from the turbo to the pan) is not "right". If the line is too horizontal or has any place where it rises on its way back to the pan, you are most likely going to have some oil blowing past the bearings into the exhaust at the turbo. Is RalliSpec familiar with this car? If so, then this is likely the problem as they have quite a bit of experience with turbo "kits" (term used very loosely) and their problems. The line will have to be rerouted somehow to make it less restrictive. Also, upsizing the return line might help if it's on the small side.

As far as stalling, the MY98 seems to be particularly sensitive on decel. If you don't have the BOV routed back into the intake tract, that should be the first thing that you do. Any air that is metered by the MAFS is going to be used to determine the amount of fuel to add to the system. This extra fuel, coupled with what is essentually an air leak, causes the engine to stall. One thing that you can do is to make sure that you engine brake for a bit before depressing the clutch, but even that won't be perfect.

Best of luck! Hope you can work the issues and enjoy your beast.

Steve
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Old 09-04-2002, 10:51 PM   #4
hayscoob
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Kyle,

Is the smoke comming out all the time? On boost? On decel? My car was drinking oil too. Turns out that two of the intake valve seals were bad and it was sucking oil in on decel and burning it off. So have some one else drive the car and and see if it is worse on boost or worse cruising or worse at decel. A leak down test will not show this problem. But you may want to try it to see if you have tons of blow-by. I would get a catch can too just to be safe. You could remove your intake pipe and see if ther is oil in your turbine or check the charge pipe too. Oil problems suck. I feel for ya.

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Old 09-05-2002, 10:09 AM   #5
Impreza25RS
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Steve,
Yeah thats exactly what Rallispec told me I should do. Where can I pick up the neccesary stuff I will need (bigger return line, fittings etc? ) And what exactly is involved? Will I need to take off the uppipe/ downpipe?
And I will try routing the BOV back to the intake (I have the HKS SSQ) to see if that helps. WHat about using the decel air function on the S-AFC will that do anything?

Paul,
The smoke is coming out of the exhaust all the time. I will definately try the catch can. Which one should I get and where can I order it from?

Thanks for the help everyone.
Kyle
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Old 09-05-2002, 06:15 PM   #6
yebokmj
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Default Stalling

I had an MY98 RS-T and now I have and MY97 L-T both of them have the potential for the same stalling problem. It is due to the fact that during these years and a few previous, the car uses and Idle Air Control senor, you will see it mounted to the intake manifold on the passanger side with a large vacume hose running from it to the intake. The motor can't respond quck enough on decel with the turbo, gets worse if you have a lightened flywheel. I am using the HKS unit that has just the answer for this I dont' stall at all and I can vent my BOV to atmosphere for that oh so nice sound. It has a learning feature that will acound for this decel problem. So good luck with your setup.
Joshua
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Old 09-05-2002, 08:09 PM   #7
Impreza25RS
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Well as far as the oil line goes I have an appointment with Adrenalin Motorsports on Monday to fix the return line so that willl be sweet...now I won't be polluting the northeast anymore and no more dirty looks either!
Josh,
I have that same func on my SAFC not sure how it works though. Anyone had any experience with this?
Kyle
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Old 09-05-2002, 10:35 PM   #8
hayscoob
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Kyle,

I know how your feel. It sucks having a newer car and blowing all sorts of smoke from the pipe. It's embarassing. But I can tell ya, it's such a relief when it's fixed and not polluting the air in the car too.

Paul...
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