Problems with VF Signal, and new AEM Wideband

[ForcedTorque]

Please help me understand what I'm doing wrong.

I am having problems trying to get a reading of my VF signal. With the car running and idling, I have been getting weird readings while trying to read my VF signal. I'm testing using E1 and VF1. Yesterday I tried with a failing multimeter, and kept getting -2.81, but that wouldn't change if I adjusted my AFC-NEO from -50 to +50. I can hear a difference in the motor as I go, so I know that the NEO is working. Today, I used the multimeter at work, and it showed -5.02, and wouldn't change with adjustments. If I revved it up while testing, it would stay at -5.02 through the rev, but very briefly would hit -3.08 on the way back down, and return to -5.02. I have adjusted fuel pressure through the Aeromotive as per TSRM (vaccuum line off and plugged) from about 25 up to as much as 35 (after reattaching vac.), but that doesn't seem to help either. Is there a problem with my diagnostic block, or is it just a problem with my understanding?


Next problem, and the reason I was checking VF signal, is I just got my AEM uego wideband installed, and it does not seem to be working either. Once I get the car turned on the digital readout keeps flashing 111,222,111,222 over and over. I have the power connected into the cigarette lighter positive wire. I did not use a 10 amp fuse as instructions called for, as I assumed that the cig lighter plug is on a fuse already.

All help is appreciated!

 

[ForcedTorque]

I got a little bit of change to report on the AEM. I drove it with it hooked up for about 10 miles after work. It ran it's series of numbers for maybe a minute when I turned it on. It then went to 14.7 flashing and L.E.D.'s fluctuating for another little bit. After that it seemed to be reading somewhat. It gave me some 14.7,15,16,17 area numbers for a little bit, then settled at 14.9 or 15, and stayed that way almost steady. Even when I revved it up or boosted, it didn't move much at all. It did move around from 14.8 to 15.2 when I did that.

I have been told that I have too much fluid in my tranny, and the car is still rather sluggish. I also need to connect my oil pressure gauge wire that was omitted when I swapped the harness. Is my ECU possibly in a safe mode, and holding my AFR's steady?

MODS......Please move this thread to the Technical section, if it fits there better.

 

[Kckazdude]

Have you tried checking the VF signal at the ECM to see if there are any variations? Right now my mind isnt comprehending a negative voltage reading.

 

[jetjock]

The first thing you should do is get or verify closed loop at 2500 rpm by looking at the NB sensor directly or it's emulation on Vf. It's more accurate for that task than any WB. Once you know the engine is in closed loop you'll know whether to believe the WB or not. After that you can address Vf. Start by setting fuel pressure to 36 and nulling the NEO out. In other words make the engine run right in stock trim before changing things.

Btw you must have your meter probes reversed. As Kck said you shouldn't be seeing a negative voltage. Either that or you don't know how to use the thing...