saylorZ28

iTrader: (6)

ok got my car fix again after lifters froze and and everything else that happened done normal break in of cam got everything back together and drove it it seem to be fine but then it started not wanting to idle at all ... pulled codes and all that came up is 141 for left bank o2 heater malfunction.. and misfire detected... now it will not run unless you give it fuel and low oil pressurehas new opti plugs wires checked all that and nutn wrong there ... do i need a lt4 knock module or what ... but break down of what i got ... cc503 and comp pro mags rr 1.6 comp magnum push rods lpp lt's and new opti plus wires and everything .. any insight will be greatly appreiciated

ss.slp.ls1

iTrader: (36)

How old are your o2 sensors? Is it tuned?

saylorZ28

iTrader: (6)

no it isn't tuned yet but i unplugged the rear sensor and it is running good now ... it semms isn't there and o2 mod because the rear just needs to be out of the exhausr stream cause it reads the the same reading it causes it not to run i read it somewhere and it was just to technical to explain ..

shutzero

Sounds like o2 sensors or it will need a tune for that cam if u haven't gotten one already like ssslp said.

ss.slp.ls1

iTrader: (36)

Rear o2's do nothing for performance, they just monitor the catalytic converters. Front o2's actually affect the A/F ratio. Not sure but your codes could be caused by the fact that you are untuned. I would get a mail ordered tune from MadTuner ASAP and then troubleshoot from there.

saylorZ28

iTrader: (6)

yea i need a tune but the low oil pressure has got me puzzled ..it held great oil pressure b4 the swap and now it dont ...not at dle anyway ...i changed the oil and it help but when i drove it it done the same thing

EAO SHOT

Try a K&N oil filter. They will give you more oil pressure and that might be all you need.

xx_ED_xx

iTrader: (17)

I would put a quality gauge directly on the engine and test it. make sure your cluster isn't the culprit. My lt1 would read 20 pounds on a quality gauge hot at idle but if i plugged in the new sending unit. IT would read 5 at idle

saylorZ28

iTrader: (6)

this is bad if i have to rebuild .. but owell i can always go bigger lol

sweetbmxrider

iTrader: (13)

do this. lt1's do tend to have low oil pressure at idle though. get a tune though!

saylorZ28

iTrader: (6)

yea well oil pressure is fine when you first start it then after it warms up it drops way low

ss.slp.ls1

iTrader: (36)

What exactly is way low?

saylorZ28

iTrader: (6)

well it slowly drops and it dont bottom out but i would say just above the bottom line

sweetbmxrider

iTrader: (13)

yeah i'd still stick a gauge directly on the engine. elimination leads to problem solved.