2005 tahoe PPV lq4 swap questions
 

I was going to post this on EFILIVE forum but there sit is down at the moment

So as it say my buddy bought a Police pursuit vehicle and we put his lq4 in it.

his mods now are
LQ4
Milled .020 317 heads
stock head gaskets
TSP228R-112lsa (.588/.588)
pacesetter 1-3/4 long tubes with ORY pipe
3200 stall

stock flex fuel injector

questions I have seeing im a newbie/wannabie tuner and I cant seem to find the answer im looking for

seeing his Pcm ve table is calibrated for the 5.3 L59 should I find a tune with a 6.0 and copy that over to start the autove process? say my dads 2005 escalade even though its a lq9?

All the reading that ive done do I try to adjust injectors first? or skip that seeing there stock. Ve tune, then work on MAF calibration, then Idle? I don't want to be running in circles trying to get this to work.

-how about the knock sensors do I need to adjust for bigger cam?
-stall converter what do I change for that again? im starting to trip over what im trying to do.
-delete rear 02 sensors because there is not cats now


as it is right now the truck will start and run until 175 ECT then rpms drop to low and stalls out. we are in Michigan 40F ish weather right now. hes hooking up the Wideband right now, should it go in the collector on the long tubes or the ORY pipe? its a Innovate motorsports LC2 hoping that we can make it work with efilive v2

Any Tuning guru wanna help a newbie it would be nice to get the thing to stop stalling once warm. Ill try to upload/attach the file so its out there if anybody wants to have it

Search Krambo tuning guide on here. Its a good start.

Injector data needs to be correct or it will not run right.

Most people just adjust the displacement setting in the PCM from 5.3 to 6.0 and then do the normal VE, MAF, idle, spark etc etc as you normally would.

thank you for the heads up on that, ill keep on reading

so yes ive read this write up that's what bring my question of swaping or copying tables over from a 6.0

"you WANT to run the RPM’s WAY up there (as close to your shift point as possible without going over 95% throttle) to hit as many high-rpm high-gms/cyl cells as possible, try to keep the engine at the higher RPM’s as long as you are comfortable doing so (I’ve seen 6000rpm’s for over 30 seconds while doing this…the motor will handle it just fine)"

if the computer thinks its a 5.3 wont it run lean?

"An engine is an air pump – plain and simple, in order for an engine to operate efficiently the fueling system needs to know how much air is entering the engine at any point in time".........." If the engine doesn’t know how much air is entering the engine it cannot provide correct fueling."

I just don't want to mess up my buddys motor

That's why you change the cylinder volume value to a 6.0L value. Not really needed to copy over an entire tune file, IMO.

oh ok thanks, sorry I was miss understanding what you where saying

ok how do you go about that in efilive? the search brings me to there site and there site is still not working

B0104? is at 666cc per cyl

do I change that to 750cc? per cyl

That right there sounds like your desired airflow drops too low for cells where the engine is warmed up.

I wouldn't really bother with wideband until get you the vehicle running and idling. Maybe some others can speak up but I personally never had any luck with WB's and idle or part throttle tuning.