ride172 Posted February 26, 2011 Share Posted February 26, 2011 I have been thinking about getting a wideband AFR gauge in hopes of being able to tell when the Renix computer switches to closed loop mode. My thinking is that there would be a different reading for closed loop and open loop. Also I think it would be a good heads up if there was ever a problem with a sensor giving a faulty reading and making it run rich or lean. Any one try this? Do you fellas think it would do the jobs I am wanting it to? Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 26, 2011 Share Posted February 26, 2011 Absolutely. I've had an AEM unit installed for a few years now and think it's now probably the gauge I watch most. It clearly shows the closed to open loop transition when the O2 sensor kicks in, and I usually wait till that happens after cold starting before driving off. Just this week I noticed that on WOT it was running a bit lean and pinged a bit on WOT. Checked out the fuel pressure at the rail and it was a little low and so adjusted the fuel pressure regulator up a couple of PSI. Now the A/F Stoich is normal in all conditions and all's well. It's a super tool for monitoring the A/F Stoich ratio right for best power vs. economy, and letting you know that all the sensors are working as they should. Especially on the Renix systems. Link to comment Share on other sites More sharing options...
ride172 Posted February 26, 2011 Author Share Posted February 26, 2011 Thanks for the good reply, I'm very encouraged to this now. Do you have a preference for analog or digital. I like the analog look just don't know how accurate the tenths would be. Plus it is quite a bit cheaper. Also, I read on naxja about a guy who had access to a Renix ecu scan tool. He said the Renix o2 sensor had a range of 0-5 v .. It's my understanding that is the same range as the wideband gauge. Can anyone verify this? Or is the Renix o2 0-1v? Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 26, 2011 Share Posted February 26, 2011 Not sure about the Renix O2 sensor voltage output, mine's a 91 HO. All wide band A/F meters need a 1-5 VDC input to function, so you will need to swap out your narrow band O2 sensor for a wide band O2 sensor to use a wide band A/F meter. But the ECU needs a 0-.5 VDC O2 sensor input, and this signal is provided by an aux output from the wide band interface. That's how I have mine wired up and am pretty sure the Renix system O2 sensor voltage output is the same as the HOs, 0-.5 VDC. Another option is to use a narrow band A/F meter (cheap!) that uses the 0-.5 VDC input from the stock O2 sensor. These also work well and will do indicate everything you want it to, just more difficult to interpret. Link to comment Share on other sites More sharing options...
cody4359 Posted February 26, 2011 Share Posted February 26, 2011 whats a good air/fuel ratio for economy and does how accurate (a little more throttle or a little less throttle) is it in helping you monitor your fuel economy while driving? Link to comment Share on other sites More sharing options...
ride172 Posted February 26, 2011 Author Share Posted February 26, 2011 Are talking about an economy gauge? All of those I have seen plug into the obd port and I don't think they would work with Renix. I think an afr gauge wouldn't be a very good economy indicator. But this is based off of reading and not experience. Maybe I'm wrong? Edit- just reread the post above, I think you were asking something different.. Link to comment Share on other sites More sharing options...
cody4359 Posted February 27, 2011 Share Posted February 27, 2011 pretty much the afr guage just shows you what the motor is doing, hornbroad said it was helpful in power vs economy driving. i was just curiouse as to how helpful it was, as in how much or little throttle was applied to drive and get the best ratio. i don't know what the economy guage your talking about is Link to comment Share on other sites More sharing options...
ride172 Posted February 27, 2011 Author Share Posted February 27, 2011 It is a guage that gives the same real time MPG as the factory roof display. Link to comment Share on other sites More sharing options...
cody4359 Posted February 28, 2011 Share Posted February 28, 2011 I'm more interested in the air/fuel ratio. simple math tells me my mpg Link to comment Share on other sites More sharing options...
dakal Posted February 28, 2011 Share Posted February 28, 2011 don-- what gauge would you recommend with price in mind. thats o2 sensor and gauge? dave Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 28, 2011 Share Posted February 28, 2011 I like this one from AEM: http://www.aemelectronics.com/wideband-o2-air-fuel-uego-gauge-kit-745 You can find them cheaper on Ebay. :cheers: Link to comment Share on other sites More sharing options...
dakal Posted February 28, 2011 Share Posted February 28, 2011 thanks. that was the one i was looking at. just want it cheaper. i'll check ebay. :D Link to comment Share on other sites More sharing options...
terrawombat Posted February 28, 2011 Share Posted February 28, 2011 Here is another option: http://www.amazon.com/Innovate-Motorspo ... 337&sr=1-2 I have one waiting to be installed on my 5.9L ZJ. I also have the AEM on my '91 3000GT VR-4 and it has worked flawlessly for the last 25K miles or so. I bought it from this vendor for $180.00 many years ago. I see he is still honoring that price. http://www.maximalperformance.com/store ... od_10.html It looks like there is an e-bay vendor selling them for $169 shipped: http://cgi.ebay.com/ebaymotors/AEM-Air- ... ccessories Link to comment Share on other sites More sharing options...
dakal Posted February 28, 2011 Share Posted February 28, 2011 thanks again. got to save whereever Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now