Holley HP EFI Wideband Bouncing
Holley HP EFI Wideband Bouncing I have the Holley HP EFI and it was tuned on the dyno. Car runs great at full throttle. I went to turn the Closed Loop Learn on and work on the driveability because I get a low rpm surge and a slight hiccup when flat stabbing the throttle.
When I went to turn the learn on I noticed the wideband gauge in the software was bouncing from Lean to Rich very fast.
Do I have a bad sensor. Its the Bosch one. The dyno was over 6 months ago and the sensor worked fine then.
Anything I should be looking for here?
Thanks
When I went to turn the learn on I noticed the wideband gauge in the software was bouncing from Lean to Rich very fast.
Do I have a bad sensor. Its the Bosch one. The dyno was over 6 months ago and the sensor worked fine then.
Anything I should be looking for here?
Thanks
The surge isn't at idle. just low rpm driving, under 2K rpm.
The wideband shows min then max with Closed loop off.....
just going to both extremes while idling or driving. The car runs and drives fine.
I can post a video later. its really odd
The wideband shows min then max with Closed loop off.....
just going to both extremes while idling or driving. The car runs and drives fine.
I can post a video later. its really odd
Video of the wideband flaking out...
look about 35 seconds in and you can see how it acts all the time
https://www.youtube.com/watch?v=xeO-...ature=youtu.be
look about 35 seconds in and you can see how it acts all the time
https://www.youtube.com/watch?v=xeO-...ature=youtu.be
Seems odd, does it always take a little while to start bouncing back and forth from lean to rich? Seems almost like the sensor or wiring might be damaged or you could very well have a ground issue
In your System setting do you have the BOSCH sensor selected?
In your System setting do you have the BOSCH sensor selected?
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Yea Bosch sensor is selected in tune.
On a cold start like that I haven't had the laptop connected in a while. I just tried drivability the other day after it was warmed up and the bouncing is all I saw
On a cold start like that I haven't had the laptop connected in a while. I just tried drivability the other day after it was warmed up and the bouncing is all I saw
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Joined: Oct 2010
Posts: 21
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From: Newfield, NJ
I I haven't seen a flickering issue like that however, I would suggest you save your current tune and and upgrade software 2.2.0.3 and load firmware (587.eep). Reload your tune, tps autoset and post if any changes result. I would also thoroughly check (tug test) the connections on the connector and wbo2 sensor.
ok, some nasty thunderstorms coming tonite so I'll give it a shot tomorrow.
I have the plug where the pigtail meets the harness ziptied to the K-member mount so it can't be pulled in either direction. But will unplug and replug it in.
I have the plug where the pigtail meets the harness ziptied to the K-member mount so it can't be pulled in either direction. But will unplug and replug it in.
Look at your maps in that area and make sure they are smooth.
What is in your learn value. save the tune before transferring the learn.
If your map is close you should be able to turn the closed loop off.
Look at your timing in that area also
Tim
What is in your learn value. save the tune before transferring the learn.
If your map is close you should be able to turn the closed loop off.
Look at your timing in that area also
Tim
