5.3l 4l60e issues NEED HELP!

[littlevictories]

to answer your oil in the intake question, these motors seem like they pull a lot of oil through the PCV into the intake. I had a bunch of oil in mine and ended up adding a catch can.

also agree with brew. establish a baseline with a good MAF.

the timing jumping around. i'll see +45* at light cruise..but generally 22 at idle and 32 at WOT

I would also double check your grounds to the back of the head, and head to frame or body. I ended up with 3 engine to frame grounds before all my weird little issues stopped.

[BR3W CITY]

Originally Posted by littlevictories

the timing jumping around. i'll see +45* at light cruise..but generally 22 at idle and 32 at WOT

Not to get off the OP's topic, but I'm curious in your case; was this light-throttle cruise with light/med load? Thats one of the places in your tune thats the most likely to be erratic due to its potential to knock. Do you have a wideband yet? Whats your AFR when you see that much timing?