Search:

Can anyone point me in the right direction for information regarding the retrofit of a GM flex fuel sensor wired to PIN 40 of my E38 PCM? I am contemplating adding the sensor to my 08 Z06 so I can...

actually, now that I think of it I tuned to a 1.0 lambda on the tables but had to use a commanded AFR because I couldn't find a commanded Lambda PID. I have a bit of error in my tune. It's...

I didn't, I tuned to 14.63. My guess is that my wideband controller is reading to 14.7 and I have 14.1 stoich 10% ethanol in the car. I will need to modify the calibration of my wide-band and see...

see info above

wanted to make sure that the car WANTED to command to Stoich at all times, except for power enrichment. THat was my understanding but never read it anywhere.

I'll get them posted for learning material.

With my MAF and tuning tables updated I re-enabled all the sensors and maps. My Wideband AFR Gauge is reading VERY close to 14.83 nearly constantly. At...

Well, I got it figured out. Got my VVE table dialed in to within 0.5% either way of stoich. After that I dialed in the MAF. The MAF tuning fixed my LTFT's. Now they are reading, on average, between 0...

Ok, here is what I found. The idle issue was a result of the minimum idle airflow table. I adjusted these and things started to settle down.

One issue I just realized was that my Long-Term Fuel...

Idle is hammered out, but when I blip the throttle it takes way too long for the RPMs to drop. They are hanging. I was adjusting the throttle follower decel. rates, but i've doubled those values and...

Well, I got the VVE tables reading pretty good. Started on the MAF and my idle speed has been jacked up. I assume that is because my MAF is now reading a lot more air at idle and after adjustments I...

new SD tuning file.... looks much better... my idle needs some work though,

18324

how lean is too lean when driving to collect data?

I am not sure why it's reading 37 honestly. How do I go about diagnosing that issue? What shoudl it be reading?

Can you lock out the engine to run off maf only? Or does it always reference the VVE...

Well, I am finding that when I disable the MAF and run my car it leans out quite a bit. I was driving and would see 16-18AFR depending on the speed and throttle. Also, my idle is ramping up and what...

and wow... I just modified the B8020 and B8021 tables and it made my VVE table look terrible. I don't even feel comfortable throwing that in my car after the modifications it makes to the...

you will notice the EXT.O2.LAMBDA reading reads 1 for a while. It was still warming up. I ran through it quickly.. this was more of a test than anything (at idle)

18320

thanks for the help. I logged some BEN factors for my MAF last night and was pretty lean. Some of my BEN Factors were around 1.45 at various frequencies... I only logged from 2050-2800HZ. I plan on...

1) I do have the guide and planned on following that for tuning the VVE tables.
2) I wasn't sure of the B8102 tables were active given that B8026 (Intake Manifold Tuning Valve Option) is set to NO....

crickets

I recently had my LS7 Heads reworked by Lingenfelter and am in the process of adjusting my VVE maps to match the adjusted airflows. The CNC program was done on the heads so they flow better. I am...

My cats are gone, so I will disable the cat protection maps.

If you are disabling the rear O2's does it make sense to disable cat protection in the ECU?

I searched the forum but only noticed information on turning off MIL's. Should the cat protection maps be disabled? I want to be sure I hit all the items associated with removal of the cats and rear...