Need ST205 help ASAP! Options

[toytech]

Not really sure how to explain it, but we have some vacuum lines that are not plugged in and we have no idea of what to make of them. Please help! This is a JDM ST205 going into a 94celica that originally had a 5sfe. Here is the other info and pics. Please let me know what we are missing or how to install/hook up these lines.

we are using the stock harness from the 94. We are using ecu
89661-2b841. the car runs starts every time we just need to know where the
temp sensors are and where we are to hook up this main vaccum line. The
codes we are getting are 21 o2 sensor, 23 & 24 intake air temp sensor
signal. I attached a couple of pics of the vaccum line. It comes off the
bottom of the throttle body, goes to a hard line then slits to a smaller
vacumm line then wraps back up to the corner of the intercooler.

Please help us out, with either pics of your set up nice and close or tell me how to hook it up. Thanks.











This post has been edited by toytech: Dec 2, 2006 - 12:33 AM

[Dr_Tweak]

Gee, this sounds aweful familiar.

Like I told you on the phone, that's not an ST205 engine, it's an ST185 RC. You can't run an RC engine with an ST205 ECU attached to a 5SFE harness, it just won't work. It doesn't matter that the car will "start", it won't RUN, because you don't have the right injectors, the right MAP sensor, the right air temp sensors, and on and on and on. You have to make some decisions instead of worrying about where a stupid vacuum line goes. Either:

Decide to use the ST205 ECU to run the engine, in which case you're going to need the ST205 INJECTORS, MAP SENSOR, IGNITOR, TEMP SENSORS (there are two I think, one in the airbox and one in the intake manifold, which you will have to drill and tap), and a number of other things, and your engine will never run quite right because that intake manifold is a dual stage which the ST205 doesn't know how to use. AND, you need to repin/rewire that harness to work with the ST205 ECU and sensors, which is a lot of work.

Or:

Decide to use the RIGHT ecu for that engine, which is a ST185, (try to get an RC but you should be able to use any ST185 and just wire up the water pump on the intercooler to run all the time), and then get the AFM which it doesn't look like you have, plus you're still going to need the ST185 ignitor (that 5SFE peice won't work past 4000 rpm), and then you need to either totally rewire the 5SFE harness to run a 3SGTE (which honestly I don't think anyone in your shop is capable of, or you wouldn't be here asking questions, so you better send it to me), or you need to get the RIGHT harness which STILL has to be rewired to work with the 6th gen body. Then you'll be all set.

Or lastly,

Use a 5SFE ECU with the harness (which you're already using) and then use a good piggyback and lots of tuning time on a dyno to get the ECU to run a boosted 2.0 engine instead of an n/a 2.2 economy engine.

-Doc

This post has been edited by Dr_Tweak: Dec 3, 2006 - 6:45 PM

[phattyduck]

Gee, this sounds aweful familiar.
-Doc

Aren't you glad we all agree with you, Tweak?

-Charlie