Me and a buddy of mine were trying to tune on his car with HP tuners and he is doing a speed density tune and he has wideband and the wideband option on the software so we got the wideband hooked up and got it to come up on the computer but the gauge reads like 14.6 cruising and the computer reads 17.0 we have no clue how to fix this problem any help would be appreciated! (sorry about the run-on sentence)

 

Is the gauge pegged at 14.6 with no fluctuation? If so check to make sure the wideband connector is proper and firmly connected, most widebands will default to 14.6 if the wideband sensor is not plugged in (or correctly). So the scanner is showing 17:1 AFR? What wideband are you guys using? Did you select the proper input pin on the HPT connector? What version (hardward and software) are you using?

 

The gauge is not stuck at 14.6 that is about the average it fluctuates the gauge seems like its closer to right cause I have tuned a car that was running 17.0 and it wouldn't even hardly pull itself. We are using the newest version of HPT right know we are having to tune the car using the narrowband O2 using there millivolt reading trying to keep it in the right range!!!

 

what kind of wideband?

 

We are using the 1st pin for the 0-5v and the 5th pin for the ground!!!

 

Oh yeah AEM!!!!

 

Assuming you can program the WBO2, try commanding a steady 2v or 3v across the board for any AFR and see what everything reads. A direct chasis ground my be a better source than the PCM too. If you command 3v and the PCM ends up reading 2.8v, you'll have to adjust the equation in the software so that the AFR is represented accurately. That way, you can eliminate any ground offsets that may exist.

 

aight 12secSS you can take this one

 

Bump!!!!

 

You need to know what the wideband output voltage is
set to represent. Then make sure the HPTuners input
is expecting the same thing. It might be handy to get
a multimeter and read voltage, as a tiebreaker in case
of system ground offsets and the like.

 

So the gauge is reading 14.6, and you tuned it to be at or around 14.7, yet the HPT scanner is reading 17.0? Sounds like an output signal reference error. Always trust the gauge, the output is possibly way off for some reason. Contact AEM, I had a similar issue when I first started using my AEM. They replaced it and everything is good.