LS Swap P0171 Code Bank 1 too lean HELP

[Vbb199]

Let me see if I can’t get that info

I never heard back but i imagine at basically from that screen shot

29degrees is too much for 800rpm.

You'd maybe want that under some other certain conditions like if the motor was hesting up, or the intake temps were really cool, or perhaps it was in gear and it needed more spark advance to keep constant vacuum.

I think you said LM7 ? I dont remember.
Yea 30 is a bit much lower 20's at idle in park would be better. That might be part of your lean condition.


The map kPa i asked for... you ought to be seeing anywhere 40-55kpa with that cam at idle.

If you arent, youve got a vacuum leak, exhaust leak, too lean or too much spark advance, or perhaps not enough airflow .


I doubt not enough spark advance, as i said 29 is alot to me.


Manifold vacuum falls for all of the above regardless ^

 

[Camar068]

following

 

[jfkelley]

I will be working on it more today and give the post an update ..I think I have traced it down to the coils not getting any spark bcuz of issues with the ground near the power steering ..Going to investigate and then update

 

[jfkelley]

Went and cleaned all the grounds, the two on the back of the head, the one going to the body the ones at the front of the block and the one from the battery to the body and now my battery is really charging compared to what it was in the past and the driver side exhaust is back to being hot confirmed it my pouring water on each cylinder.. Haven’t drove it but it’s titled for 30 minutes without a problem.. will update this post once I drive it for a while

 

[jfkelley]

Found the issue there is a short in the main harness that goes into the coil pack harness that mounts on the coil bracket

 

[Camar068]

Found the issue there is a short in the main harness that goes into the coil pack harness that mounts on the coil bracket

obvious pinch or anything? How'd you figure it out?

thx

 

[jfkelley]

obvious pinch or anything? How'd you figure it out?

thx

I was messing under the hood and put my hand there, and whenever I put my hand on the top of the harness the truck stumbled so I moved it back-and-forth and it kept doing it now it’s just an issue of how to fix it. Pull the tape back. I didn’t see any wires or pinch so I’m thinking it’s actually in the connection inside the plug if that makes sense.

 

[Camar068]

I was messing under the hood and put my hand there, and whenever I put my hand on the top of the harness the truck stumbled so I moved it back-and-forth and it kept doing it now it’s just an issue of how to fix it. Pull the tape back. I didn’t see any wires or pinch so I’m thinking it’s actually in the connection inside the plug if that makes sense.

thanks for the info, good future reference. Let us know which wire/connector when you have time.

 

[Vbb199]

You might consider checking the ground on the back of the head.

 

[jfkelley]

You might consider checking the ground on the back of the head.

I did that and double checked, and triple checked the grounds .. when I move the coil pack, connection, harness back-and-forth the truck stumbles so I’m gonna assume there’s a short there