I just purchased the HP Tuner suite. I have a 2001 Drive By Wire Chevy 5.3 engine mated to a Manual NV4500. I have no cats and removed all emissions. I have about 600 miles on the newly rebuilt engine. The troubles I have is that it is getting about 8 mpg. Any advice you may give would be great! Attached is about 15 minutes of my scan file.
Thanks in advance.
Last edited by sgirt; 02-06-2010 at 01:40 PM.
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
Have you done the MAF or VE at all? Your trims are -10+ which means its very rich, hence your mileage problem. A log of you actually driving instead of idling for 80% of it would be more useful.
Post your tune file
I will record me driving rather than sitting idle. I had the ECM programmed during my conversion. I just bought the HpTuner software and only have downloaded to it. Attached is my tune or what it is currentlly programmed at. Any suggestions, let me know. I am learning.
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
Here is the scan file of me driving a few minutes ago.
Thanks for your help!
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
Who did the programming? What are the mods to the engine? The spark tables and airflow tables are all stock for a 5.3
you're showing a lot less timing than my 2000 5.3 had when stock.
Last edited by miker2; 02-06-2010 at 05:28 PM.
I had it done by lt1swap.com. It runs great, just very rich. You can smell the gas when running.Originally Posted by Atomic
Other Mods.
Headers to a Y with a single magnaflow exhaust. It has a K&N intake. Otherwise it should be stock.
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
tried to upload my comparison tune but site wont let me.
You can email it to me and I will post and could comapare it with mine.
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
Thanks for the email with your tune. I will do some comparisons.
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
my file for the 2000 is for a cable drive throttle body with egr. but i would think the timing should not be that different.
did you ever figure this out? i just did the same thing as you. i got lt1swap.com to do my harness and everything and it uses fuel so bad.
im new so im not sure if i should just record a quick tune running through all the gears or what?
thanks
evan
I have been working my tune. It is a lot to absorb. I posted my latest tune tonight to see what those think. It seems like it is getting better mileage and running my fuel trims between -13 to 13 with a few off the chart, but mostly in the 0 - 13 range. So, I am still working with mine. What is your setup? EGR? Pre Cat 02s anything else?
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
dang who makes a nv4500 bellhousing for a lsx motor?
2000 z28 race car
85 mustang Ls turbo
I got mine from Advance Adapters. Bolted right to the back of my 5.3 LS base engine.
http://advanceadapters.com/category/...+Packages.html
1969 Fj40, Chevy 5.3, NV4500, HPTuned (almost)
http://toysandbox.com
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