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| WBo2 hook up to 7730 (Page 1/1) |
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fierofinder
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JUN 03, 05:05 PM
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Still trying to get my fiero tuned. It's been tuned well enough it drives ok but my tuner says we need the wideband hooked up for fine tuning. So I have it installed and it works but we are not getting the information showing up on the data logs. I need to look up what we did again but we had it hooked up one way and it didn't read so he changed some stuff on the tune and we swapped the pinout of the o2 and now we get a reading but it's not right. Any one have an idea what we are doing wrong?
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Wichita
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JUN 04, 01:46 AM
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Will
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JUN 04, 08:58 AM
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| quote | Originally posted by fierofinder:
Still trying to get my fiero tuned. It's been tuned well enough it drives ok but my tuner says we need the wideband hooked up for fine tuning. So I have it installed and it works but we are not getting the information showing up on the data logs. I need to look up what we did again but we had it hooked up one way and it didn't read so he changed some stuff on the tune and we swapped the pinout of the o2 and now we get a reading but it's not right. Any one have an idea what we are doing wrong? |
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So you need to know what input the WBO2 is hooked up to, and what arithmetic the .bin does on that raw value before sending it out on the data stream. We can't really help with what you've given us here.
If the .bin is interpreting the WBO2 signal like an A/C pressure transducer... you're going to have a bad day.
Then you can optimize the phase variance on the EPS manifold.
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Blacktree
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JUN 04, 10:14 PM
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Last I knew, the 7730 ECU wasn't capable of interfacing with a wideband O2 sensor. That's one of the reasons I switched from the 7730 to a Megasquirt.
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jdv
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JUN 04, 10:26 PM
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fieroguru
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JUN 04, 10:26 PM
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As Will said, you want to find an unused 0-5V sensor input to the ECM (not sure if the 7730 has one - digital egr?). The wideband will have an option for a 0-5V sensor output which is then wired into the ECM 0-5V sensor input. You will want to log this 0-5V sensor input in your data stream with RPM and MAP, then apply the math to convert it to the corresponding AFR. Once you have all that being logged with the appropriate math to get AFR, then you can get started with some accurate tuning.
Way back in 2006ish, I ran the 7730 with the a SBC swap. To tune it (didn't used a wideband, except when it was on the dyno) I logged lots of data, dumped it to excel, threw it into a pivot table to consolidate it into the needed +/- by RPM X MAP. It was pretty much a pain... Once I went OBD2 with HP Tuners, the tuning became 10+ times easier as the scanner package does all the math and consolidation for you once you get the custom parameters setup.
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fierofinder
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JUN 05, 12:40 AM
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Thanks for the replies. I've been digging through a bunch of old emails and texts trying to piece together where we left off last year. We started with signal wire in f14 but changed it to a3 after he made changes to the file we are using. No clue to the changes he has made to the file.
So if there is no way to hook up the WBo2 for logging and remote tuning I should still be able to get a good tune from emulating so that the WBo2 can be monitored? Haven't tried emulating and not sure if Dave has or would be comfortable doing so.
Tune seems close but it did accelerate better at one point but wouldn't stay running. Since I've had Dave tuning it idles great and doesn't stall out any more but has sluggish acceleration. To much throttle at lower RPMs makes it bog out and it also starts to fall flat above 4500 RPMs. Any suggestions for that are do the fuel curves just need more work?
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fierofinder
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JUN 05, 12:56 AM
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jdv, I checked out that link. Thank you. The S AUJP V6 is what we are using. I will take time to read through the must read info on the v6. I'm assuming Dave has and I know he had someone else more familiar with it helping him and I believe that's why we made the change to pin a3. Currently he is busy with family stuff that's why I'm trying to study up and find what we might be doing wrong. Thanks again.
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jdv
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JUN 05, 08:02 PM
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It is nice that he put info for dis set up on a v6 engine. I used the S AUJP v4 on my 3500 lx9 before I swapped to the 7165 $12 set up.
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Will
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JUN 07, 10:12 AM
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| quote | Originally posted by Blacktree:
Last I knew, the 7730 ECU wasn't capable of interfacing with a wideband O2 sensor. That's one of the reasons I switched from the 7730 to a Megasquirt. |
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The 7730 doesn't control mixture based on the wideband output, but hooking the 0-5V WBO2 output up to an unrelated 0-5V input on the 7730 allows the WBO2 reading to be logged along with the rest of the OBDI data stream... so you get reliable AFR readings that are automatically time-correlated to the rest of your logs. It makes OBDI tuning easier... not easy, just easier.
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