i just put a my 383 back in the truck after putting new pistons in, and i'm having trouble with the computer stuff now.

it starts and runs real good, i mean i haven't touched the power yet cuz i don't really know what the fuel is doing.

it just tells me that the BLM is 128. and i'm pretty sure that not the case across the board. i'm thinking it could be O2 sensor related perhaps, but i'm just gonna ask you guys what else it could be. tomorrow i'm gonna be fixing exhaust leaks an other quick stuff, and i'm hoping its a simple fix.

so thanks for any leads.

Josh

 

Josh,
Is the O2 sensor ever reading over 700 mv or so? If not your running too lean at idle. I have had my engine run so lean at idle that the ECM would never see that the 02 was ready and would not enable closed loop.

NO KNOCKS?

Chris

 

No knocks dude. i'm so stoked. i have exhaust leaks like a ****, but those a cake compared to what i just fixed.

at idle the WUD was telling me the blm was 110. then as soon as i tip in it goes to 128 and doesn't move.

 

Is the closed loop flag and BLM update flag checked when this happens?

My Goodwrench engine is still ticking at idle. I have run it over 6,000+ RPM many times though, still holding togather. No metal in the oil or on the magnetic drain plug. No metal in the filters I have cut open.

I raced an 07 Altima with the 270HP 3.5 V6 a couple of days ago in my G20. Took him to 70+ MPH where I let off.

 

meh, i don't know. i didn't look for CL until i was driving already. i'll look on my way home to see what kind of stuff it tells me. waht are you thinkin?

 

Thinking that some parameter is not being met to allow for the BLM updates. It could be in closed loop, but the BLMs locked.

Still running the same cam, compression ratio, etc?

 

hmmmmm....

ya same cam, etc. no other changes other than porting and speed pros versus the keith blacks that were in there.

 

Odd

Non sensor safe Silicon?

 

like on what sensors?

 

The Vapors from some silicons will kill an O2 sensor instantly.

That is why I am curious about the closed loop flag and the 02 voltage reading.

 

thats not good, but i would assume it is sensor safe. it is the same **** we build all our engines with at the shop.

 

I have not heard of any that are not sensor safe in a long time, but you never know.

 

ya. well if the sensor did die, i guess i'll just have go get an LC-1......damn. but i kinda don't think thats the problem.

 

NOR DO I

Just a possible one.

Coolant Temperature Sensor reading correctly?

All your grounds secured properly and have clean connections. IIRC you painted your engine. Paint is an excellent insulator.

 

um........so .......i think i just got it.


i'm embarrassed to say that the damn sensor was not even plugged to the computer......ugh i feel SO dumb but at least it was simple. and i only drove like 15 miles...so i'm sure it'll be fine.

 

LOL

 

i guess i just got sick of hooking up sensors or something. i'm so sick of working on the engine now, it will be nice to just tune it.

 

I know the feeling

I am on 700r4/4L60E # 5 or something like that. 3 in the past 3 months. I am not burning them up, rather breaking hard parts. Shreading planetary gears and breaking drive shells.