Pulled 6 codes...

[LJRuddy]

KOEO
15- ECA ROM test failure.
42- HEGO sensor circuit indicates system rich (rear).
75- BOO switch always closed.

KOER
22- BP out of self-test range.
51-ECT sensor indicates -40degF; circuit open. Suspect possible shorted ECT, harness.
67-'89: NPS circuit open; A/C input high./'90-91: NPS circuit closed; A/C on.


I do know that on a cold start up and at higher RPMs it does run rich enough so that i can see blue smoke but i the engine does not eat up oil at all. Any thoughts as to whats going on? I am thinking O2 sensor replacement time at least for the rear 3 cylinders. What do the other errors mean? I cant find a good explanation from shotimes, v6SHO, etc etc.

 

[silversho89]

Blue smoke is oil burning not running rich, thats black. The oil on start up is probably valve seals and i dont remember if that would do it in high rpms, i think that may be rings. Not for sure about the causes but your definately burning some oil. Have you had a 60k lately?

Rob

 

[LJRuddy]

The engine was rebuit not a thousand miles ago. I dont smell any oil at all and like i said, i have not had to add a 1/2 quart to the engine since i bought it. I can smell the exhaust and its definatly not oil....

 

[GreenLanternSHO]

Liberty,

When did it start smoking? The reciept I had just had a total cost of the rebuild with labor, it never showed the individual parts bought.

Are you sure the smoke is blue? The oil never went down a drip after me and my dad replaced the main crankshaft seal. Theres a small chance it could be running rich since the engine is a 90 model and the ECU / wiring harness are from the original 94 engine.

I wish I knew somthing about codes so I could help you, but I have no clue. How is it running other then the smoke at start up? I'll see what I can do about finding som information on the codes, because it's bugging me.

EDIT: Now that I think about it, the 02 sensors may be causing problems. Im sure the y-pipe had some oil get into it when the old motor blew. The oil may have messed with the 02's.

Did the check engine light come on?

 

[Rockledge]

Does the car have a chip installed? An aftermarket chip can throw a code 15.

Did you warm up the engine before you pulled the codes? An ECT code can be set if the engine isn't up to operating temperature.

 

[LJRuddy]

This is a late reply but here we go...


Is only smokes on a cold start up... and i mean COLD. If i start it up after i get out of school, it wont smoke... When i go to start it in the morning to go to school, it will smoke for about 3 seconds. It is a very dark blue smoke now that i look at it more. I just did an oil change and put in a bottle of Lucas oil stabilizer in it and i have been running fuel treatment from Lucas as well... I went through about a quart or so of oil before i added the oil stabilizer... now it seems like it has slowed a bit. I am saving up for a set of O2 sensors right now so maybe that will solve the problem.

Aaron, dont worry too much about it. The car is running VERY well and i am a satisfied customer overall... These SHOs pop up with random problems all the time so i am sure its not your fault.

And yes i ran the codes after a 20 mile drive from school on a 95 degree day. I parked the car, went inside to change, ran the engine at 1500 for about a minute or so to make sure it was warm still and pulled the 6 codes then. Nope... no CE light either