I've got an S4. As soon as I hit above 0 psi, my WideBand goes way lean. To the point where it seems like cld even be a fuel cut.

Anyways, I'm running a Haltech, but after a couple weeks of checking things out, I (and Haltech tech support) haven't been able to find an issue there.

I'm wondering if there's anything hardware-wise (turbo, injectors--non-ecu) that could cause this issue.

Again, runs fine as long as do not get into boost.

Can someone point me in the right direction?

 

fuel pressure? was the car ever fully tuned and ran properly before? more details would be nice.

 

Car was tuned and running fine previously on the stock ecu, then on a Microtech.
I am currently setting it up on the Haltech.
It has a 3rd gen fuel pump-have been running this pump for several years.
New 720cc and 1000cc Injector Dynamics injectors. The injectors are fairly new and haven't been run on the car fully tuned.
I've been running the same hybrid turbo since the stock ecu.

 

so this is a new ECU you installed, was it used? did you make sure it had the appropriate basemap installed and reverify it wasn't a corrupted or adjusted basemap by downloading and reinstalling it?

maybe now you might have an understanding why a little information saves us time going back and forth like this.

 

As I mentioned in my first post, I had a Haltech tech support person review my setup.

More specifically, he connected remotely and gave it a full basic tune. While connected remotely, he went thru the entire sw setup and applicable fuel and ignition maps for my setup as well as having me retest the timing with a light. He made some adjustments and concluded that everything was setup correctly for a basic tune.

The issue persists after his adjustments.

This is a brand new ecu.

If there is any information that you need that I haven't provided, apologies in advance as I am unaware of all the information required to fully diagnose this issue(part of the reason I'm asking for help).

 

it sounds to me to be an injector staging issue, one or more of your secondary injectors may not be working which will not present itself until moderate loads are reached.

you can bleed the fuel pressure and run a cycle test on the injectors, plugging them in one at a time.

 

I tested the secondary injectors. When I apply power they click on.
I also double-checked the wiring to the injectors. The wiring is setup the way it should be.

 

visual inspections can be misleading, i forget but doesn't the haltech have a test mode function?

 

Unsure. I'll do some research to find out.

 

It was an injector staging issue.
I had someone from haltech remote in and set me up, but the problem persisted. c ludwig took a look at my maps, made some staging adjustments and runs great now.