Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
RX with engine troubles...*mostly solved*
Posted 25 July 2003 - 11:09 PM
Once the manifold reaches atmostpheric presure/eqalizes, and then boost comes on, power drops off dramatically, acceleration almost stops. Its like she boogs, but the engine just stops producing power, and just runs. No power. Let off, and no boost, power back on. At some point, when you floor it, power will come back, but not much. One time, while she was cold cold, she gots lots o power....but that never happend again.
I fixed the overheating issue, fresh water/coolant, and a 180 t-stat after flushing everything.
So.........any ideas on why the engine and system are doing this? Please post anything that might do it.....keep in mind this car stayed in West VA for a time, and the owners never really took "proper" SUBARU care of this thing.
What could be it...........?
Posted 26 July 2003 - 03:49 AM
Posted 26 July 2003 - 08:04 AM
Posted 26 July 2003 - 11:06 AM
Posted 26 July 2003 - 01:18 PM
Its got the downpipe...with nothing in it at all. So there is ZERO backpressure. So...thats one area out....
I've got a few laying around, I'll swap it and see what happens.
Indeed the turbo to intake plenum was loose, I fixed that before i posted here...I WILL be checking for leaks everywhere, it does sound like there IS one...somewhere...
I plan on making a downpipe that doesnt leak, its going to be catless, and will have a muffler to quiet the RX...so I can hear any more boost leaks...
Posted 27 July 2003 - 06:38 PM
Posted 27 July 2003 - 06:51 PM
Just a guess.
Posted 27 July 2003 - 10:40 PM
I have a vacuum gauge that I got for Christmas, that is supposed to double as a fuel pressure gauge for carbureted systems (reads up to 10 PSI), but I find it works as a good boost gauge. They run about 25 bucks, but are a GREAT tool to have around. Mine is an Equus I think..
Anyhoo, get one and hook it up to a free vacuum connector (Make sure it is connected directly to the manifold, and dont' hook it to the little hose going to the wastegate diaphragm unless you T it!) Now, go drive the car and see what your boost gets up to. If it doesn't go above 1 or 2 PSI (Only takes like, a hair above 0 to get the light to come on) you are prolly having wastegate issues. WOT should kick that turbo up to 7PSI within a matter of seconds, I know my 87 does.
Posted 28 July 2003 - 05:23 AM
I'll check out the knock sensor as well as the waste gate.
Posted 28 July 2003 - 06:01 AM
Posted 28 July 2003 - 09:41 PM
Posted 28 July 2003 - 10:10 PM
In my case it seems while the ECU is running in closed loop mode (getting feedback from the oxy sensor) it could keep the mixture about right, however when the green turbo light came on and it switched to open loop mode and rich fuel mapping that's when the problems started. If you're not seeing any smoke like I was perhaps you might have the opposite problem, a dodgy fuel pump or pressure regulator not giving you enough fuel?
Posted 28 July 2003 - 10:19 PM
I'll let ya'll know how it works out. Thanks for the info!
Posted 30 July 2003 - 03:52 PM
Posted 31 July 2003 - 07:39 AM
??????????????????????? What is it the problem????????
Posted 31 July 2003 - 06:29 PM
Posted 31 July 2003 - 09:49 PM
That will be the thing I do next Corky!
Although I suspect the injectors COULD use a cleaning...I know that the GL-10 ran MUCH better after I cleaned them!
Posted 31 July 2003 - 10:04 PM
Posted 01 August 2003 - 03:54 PM
Posted 01 August 2003 - 04:54 PM
I replaced the waste gate actuator with a known good one from 1986. MUCH better when boost comes on...but the engine still lacks...BALLS. Its also got a stumble when you start to step on the pedal at idle...Skip has emailed me a few things to check...but i was wondering if anyone else has any ideas now...? Maybe changing out plugs and coil would work? I already replaced the wires.
Posted 01 August 2003 - 05:32 PM
So, don't know if this helps or not. The EGR Solenoid that was bad showed no continuity on an ohmmeter between the two contacts.
Posted 02 August 2003 - 02:16 PM
Now...I need to fix that horrible factory intake system, run some fuel system cleaner thru it, install the inner fender well covers (if I can find some) and start working on things other than the engine now!
Mods to come:
Synthetic oil, oil cooler and remote oil filter.
Better intake and exh. system.
Replace clutch and pressure plate...lighten flywheel?
Install 5 point simpson harnesses and racing seats.
New steering wheel (MOMO?)
Modify the D/R selector (shorten) and make a short shifter (like Flowmastered87GL did)
Some other small things......
Spyder intake, WRX intercooler, higher output ALT and install my rally lights.
SEAL UP THE WHOLE CAR!! Need to keep all the dust and water out of places that it doesnt need to be!
Oh, I shoudl fix the brakes...new slotted rotors and EBC pads if i can find them. DOT 5 fluid and rebuild the whole brakesystem.
And most important for the car as a whole....CAMBER. I really need to get these camber plates made.
Ofcourse, the USMB will be kept up to date on the progress of my GL-10 and RX mods.
Is this a long post or what? :rollin:
Posted 02 August 2003 - 03:07 PM
Posted 02 August 2003 - 10:37 PM
Glad to see it running now. My GL-10 does the stutter from idle sometimes, but what gets me is the hesitations while under normal accelerations, if I floor it, the hesitations go away. Go figure.
Posted 03 August 2003 - 12:50 AM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users