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I know this is an old thread but I wanted to revisit since this is still an issue.

Long story short I parked the car and bought a house. Now that everything has settled I have some time to get...

Thanks guys I'll play with it some more tonight

I have the decay delay maxed out, how else can I have power enrichment last longer?

Car is 3bar SD, always in open loop.

I'm not sure what to do when it comes out of afterstart and goes right into surging again...

I'm happy I'm at least heading in the right direction

I lied about the OFLA table, corrected it.

So now I was able to correct the surge when warm by setting the afterstart enrichment delay to 255 and adding a ton of fuel to adder vs ECT. But now when...

The reason I went lean on cold start is because it was too rich. As the tune sits now cold start and up to temp is fine, its just when you shut it off for 1/2 hr it begins to surge and run super...

Well I am having no luck at all, I'm able to see the changes i'm making affect the tune, but I can not for the life of me figure out what table to adjust first where and how much, I guess I just...

Thanks for the info guys, its finally cleared up down here so ill be doing some more testing.



Yeah, I really don't see anything higher then 120 IATs after sitting, and comes down farley...

Looks like this could be my issue
http://www.hptuners.com/forum/showpost.php?p=78974&postcount=17
Now it just a matter of figuring out what to change first and how much

So I just drove the car, exactly what I was afraid of running too rich when cruising around (10 instead of 13ish afr)

What are the limitations of afterstart? meaning is it only a few seconds or...

Here you go, same config as in the original post

I was able to correct the issue for the most part by modifying the OLFA and afterstart. I'll check tonight to see if it will screw up my cold start.

If I correct for it in OLFA wouldn't that affect the idle at that temp when it's started from ice cold?

I'll play with it some tonight and see how it goes.

Guys,

Car is an 02 Z28 with an iron 370 9.3:1 motor 160lb injectors single front mount PT88 running a 3 bar map and OS.

Here is the scenario:

Say I come out to the car when its ice cold,...

Could a bad knock sensor cause this?

I didn't get any check engine lights, I can check to see if there are any codes though.

Hey guys,

Quick background, 02 Z28 347 fully forged 8.5:1 CR single front mount PT88 running on 93 with meth injection

Just recently I’ve been getting false knock. It will occur in neutral free...

Here is the tune, all that is changed at the moment is Min fuel Milligrams

After changing Min Fuel Milligrams to 0.001, and adjusting the short pulse adder, I was unable to get my pulse width lower then 1.8 which it was prior to adjusting.

I feel like I am missing a...

should I lower everything across the board? say multiply the whole table by 0.95 and go from there?

They are high impedance, could you post up your tune so I can use it for reference?

At what values should I adjust these at? Should I creep down in 10% increments? ( injectors.jpg attachment)

Where exactly do i need to change the minimum fuel mass? (transient fuel.jpg attachment)...

Hey guys,


I'm having an issue with getting my idle dialed in.

Car is a 02 Z28 with an 8.5:1 347 single front mount speed density.

As of now, I have my base fuel pressure at 35lbs, my...

I didn't know that, does this mean both fans don't run full speed from the factory?