R37ribution

So I was driving to work this morning and I tuned a corner and shift into 2nd at around 3k when the motor started missing with my foot off the clutch. I put my foot on the clutch and looked around thinking at first I shifted funny and tried letting off the clutch again when it happened a 2nd time. I then noticed a check engine light on and it engaged normally at this point. I pulled over, cut the car off and checked under the hood. Didn't notice anything. Hopped back in the car and it hasen't happened since.



Any ideas???



I did a lil research and noticed the "dreaded 3800 RPM hesitation" issue but this triggored a CEL and seemed more like a missfire than a hesitation.


Thanks

Enthu

iTrader: (1)

Extract the CEL code. That will get you on track for what happened.

R37ribution

Thats the thing, the CEL went out after I pulled over and stopped and stared her.

Does the computer log previous reasons for the check engine light comming on?

RETed

Try and scan it.
The error codes will sometimes be still stored.

Or next time be prepared to scan the error code and not reset it before you do.
All you need to do is ground one pin and stare at the CHECK ENGINE light.


-Ted

R37ribution

Ok, it started missing again and the CEL came on so I scanned it...

the two codes returned are:

Code-17,Input-Feedback System,Malfunction-Oxygen sensor output remains below 0.55V 10 sec. after F/B system operation begining,Fail-safe-Feedback system canceled (For EGI)

Code-27,Input-Metering oil pump (MOP),Malfunction-Malfunctioning MOP, step motors, broken wire, short circuit, or malfunctioning ECU,Fail-safe-MOP fixed smallest open Basic fuel injection amount and ignition timing fixed

Can anyone explain these errors a little better, I don't see why I would get these two codes together. I searched briefly on "feedback system" and didnt find a lot. Is the MOP actually the oil pump itself or just a monitor?

:edit:
The oil pressure at idle is around 30psi and when driving around 60psi.

RETed

Ignore O2 sensor error codes.
This is just degrade gas mileage.

The 27 is the bad one.
E-OMP malfunction triggers limp-home mode, and no way to fix it but to replace it.
Those things are stupid expensive new from the dealer, and even good used ones are like $100+ typically.


-Ted

R37ribution

alright thanks for the info...

so is the oil pump not pumping sufficiently or is it just not reading oil flow accurately...or both?

RETed

The electronic oil meter pump is bad.
It needs to be replaced.
The stock ECU goes into limp-home mode, cause it's assuming there's not enough oil going into the engine while running.
This will slowly cause the engine to eat itself to death.


-Ted