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Just started computer tuning for the first time ever with HP Tuners
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Originally posted by Paul Whalen View Postany way to drive it a bit? like 30 min? I always let the computer learn a bit before making more changes. Unlike the stand alone setups give it some run time. can give it a bit more timing at idle also.
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any way to drive it a bit? like 30 min? I always let the computer learn a bit before making more changes. Unlike the stand alone setups give it some run time. can give it a bit more timing at idle also.
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Originally posted by BKBridges View PostI don't think Id call that a rich idle, just not stoichiometric.
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Yep. Clamped on some extra pipe and viola, all systems go. Idles nicely, wideband says idle is just a touch rich at 14.3-14.4. Looking good.
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Checked all of the connections and voltages, all is well. Only thing I see that is different between one side and the other is I have a collector extension welded to the header on passenger side/bank2, but I have a shorter, open header on bank1. It's got to be the unmetered air hitting the bank1 O2 sensor, isn't it? So that sensor is never warming up enough, and is reading fresh air making it add WAYYYYY too much fuel in an attempt to compensate. I think I will clamp on a section of pipe tomorrow and see what's what. I would just go ahead and weld my exhaust up, but I'm waiting for my u-joints to show up to install my driveshaft before I install my x-pipe. Don't want any clearance issues...
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I'm an idiot, I'm too tired and thinking backwards. Bank1 O2 sensor remaining fairly stable low, and the Bank1 injector pulse width being higher, and the bank1 fuel trim being maxed should indicate a bad injector/connection on the driver's side. Be right back, heading out to the garage.Last edited by 1970camaroRS; March 20, 2014, 12:08 AM.
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Also, on bank1, the LT and ST fuel trim is WAY up all the time. This should be closer to 0, correct?
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Take a look at this screen shot of my datalog:
The bank2 02 sensor is all over the place and the bank2 injectors pulse width is much lower than bank1 and all over the friggin place in fuel trim. Do I have a dead injector on that side or a wonky O2 sensor? I'm going to swap the O2 sensors left to right tomorrow and see if the problem migrates. Tonight, I doublechecked all of the wiring for the injectors and everything there is good.
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Hit the books again last night and looked at the log from the previous run. Timing was completely wrong for one thing, and airflow and fuel was a bit off, but not bad. The bank1 02 and injectors were at good levels and stable, but the bank2 02 and fuel injectors were not very stable. No DTCs yet.
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IF your 02 is close to the end of your headers that might cause some problems as well. Putting some exhaust on it will help that AND help you think while your working on it lol.
I am working on an MS3X setup and I am sure I will feel the same way. The good part for me is the car currently runs well with a carb so I have an idea on target air fuel and timing to get started.
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Just started computer tuning for the first time ever with HP Tuners
I've been at it the last two days and this is how I feel:
I've gotten it to fire up and idle until it's almost warm. Then it's very rich and stumbles around 400-500rpm. I think I've figured it out looking at things tonight, but man is the learning curve steep!
Just a mild 226/232 115 cam on a LQ4 and headers. Granted, it's open-headers right now, so that's not making things any easier, so I think I will be welding tomorrow, then loading my revisions and warming it up again.
Just wanted to share how I currently feel!Tags: None
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