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Help!! My SS is being wacko...

Posted: Mon Jan 22, 2007 5:10 am
by 555BCTurbo
Ok...so I have been battling my Legacy for a few weeks now...

It runs...but not very well...

It started out with seemingly an ignition miss...so I replaced:

-Injectors (took my 440's out and put my good 370's back in)

-TPS

-Crank Angle Sensor

-Coil Pack

-Ignitor

-Spark Plugs

-Fuel Filter

-Checked compression (150 in all four)


Now, it runs worse

It idles fine, but anytime off boost, it has no power and stumbles...

If you hold the throttle at a given position, the engine will rev, and then start to sputter and slow down.

Also, my wideband 02 reads full lean when cruising, but 14.5-14.7 when idling...so I don't really understand why that is...

Anyway, any help is much appreciated!!!

Posted: Mon Jan 22, 2007 5:18 am
by GLCraigGT
Do you have anyway to test the fuel pressure and the fuel pressure regulator?

Posted: Mon Jan 22, 2007 5:27 am
by 555BCTurbo
That might be a good idea...I should get a fuel pressure gauge...


You suppose that the FPR is not advancing pressure enough down low, and is causing the lean AFR's?

Posted: Mon Jan 22, 2007 6:06 am
by douglas vincent
Temp Sensor FTW!!

Posted: Mon Jan 22, 2007 6:22 am
by 555BCTurbo
douglas vincent wrote:Temp Sensor FTW!!
I replaced it about 1.5 years ago with a new dealer one...and it doesn't seem to be temp related...but do you still think it could be?!


Oh...and were you able to happen upon some SMT6 pinouts by chance ?! :D

Posted: Mon Jan 22, 2007 3:20 pm
by BAC5.2
Could be Knock Sensor, or as simple as your oxygen sensor. Sounds like what mine did when it acted all funky.

Posted: Mon Jan 22, 2007 8:11 pm
by 0perose
another vote for temp sensor

Posted: Thu Jan 25, 2007 12:02 am
by 555BCTurbo
Replaced the temp sensor...no dice...


Gonna try the fpr next methinks

Posted: Thu Jan 25, 2007 12:28 am
by livestrong14
sounds like my car when it was acting up. It was the o2 sensor in our case. We just unplugged it, and it worked fine!

Posted: Thu Jan 25, 2007 6:01 am
by 555BCTurbo
Yeah, I did that too Devan...but I am running a wideband, so its a little bit of a different story there