350 showing lean at idle.
ZZ4 cam 24 lb injectors
Not sure how to add fuel at low RPMs.
Any help appreciated.

 

You need to add fuel in maf 1

 

Yup maf table 1. Maybe 2 depending how much rpm and load. Kinda watch rpm and current logged maf flow value and go to that value in table 1 or 2, and increase the values at and around whatever your logged value was.

like 1200 rpm 16 grams/s... go to table 1 and find where 16 is and increase the cell above and below some

 

Don,
What kind of injectors? P/N?

 

Bosch SVO 24's

The heated 02 just lays flat until I blip the throttle.

 

Are these the Bosch IIIs? Any way to snap a photo of them?

O2 stays flat at what voltage?

Anyway to get a tunerpro datalog?

 

But the tops are blue instead of red and 02 at 100-200

 

Quick try is move maf scalar 1 up two values and see what happens lol

 

I'm helping someone with those same injectors. Should probably make sure you have the right voltage offsets for them...

http://forum.efidynotuning.com/viewtopic.php?t=464

I think these are ones...

 

I've added fuel in the MAF table 1 and 2. I've dropped the injector constant from 24lbs down to 16lbs. The O2 at idle is still in 100mv range or less, and BLM is at 160.

But as soon as you open the throttle, the heated O2 responds normally and does a good sine wave.

 

Kevin,

What is the voltage at the keyed ignition switch vs voltage at the battery when the engine is at idle?

It sounds like you may have some sort of voltage drop issue thats screwing around with the ECMs calculation of final base pulse width.

 

That or a bad o2? It should be reading if heated

 

It's just strange that it comes to life just off idle. What comes to mind is system voltage that can often be low at idle speeds if the alternator is bad. Or if theres a large voltage drop across the ignition switch which can screw around with the ECM .

 

Yeah that makes sense. Maybe get a reading at the plug at idle see what it is

 

o2 plug and the injector plugs...

 

Assume car is still in open loop. Does car have still have an AIR pump (California)? Is Air Controlled = Not Diverted and Air Switched to Port = True? This can shift O2 and WB lean by about 1-1.5 points (if available). Get it into closed loop and give the fuel trims a chance to adjust before passing judgement.

 

Yes it has an air pump. I didnt change those settings so they should still be true. Yes its going into closed loop and still running lean, with BLM at 160 at idle.