Running an LQ4 without o2 and maf?
07-06-2009, 07:05 PM
#1
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Running an LQ4 without o2 and maf? I have been looking at my harness lately and can't find the plugs for my O2 sensors and my MAF, is it possible to run these motors with a basic program and not use these sensors?
Thanks
Tom
Thanks
Tom
07-06-2009, 07:07 PM
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I have heard of them being run without the MAF and just the o2 sensors but never without both but I don't know maybe. If it were carbureted then yea but I wouldn't think it could be done with fuel injection
07-06-2009, 08:54 PM
#3
If I understand GM's open-loop and "limp-home" strategies well enough, you should be able to get by without both, since it should default to the MAP and preset fuel tables, but I dunno why you'd do without oxygen sensors in a system like this? or no MAP without an SD-only tune? I mean I could forsee it it you just wanted to get things started, but...
07-07-2009, 09:21 AM
#6
Hell, you can take a piston out and still make it run, but why would you want to? I ran my LS1 in my '33 without a maf when starting it for the first time, and several times after that, but it fouled the plugs in short order and then wouldn't even run. Just my experience.
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07-11-2009, 10:28 AM
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You can run without the MAF and O2s....it's called open loop speed density. If you are confident in your tuning abilities you can make a OLSD car run fine.
Personally, from an engine safety perspective, I would run Closed Loop SD if you are set on running without a MAF.
Personally, from an engine safety perspective, I would run Closed Loop SD if you are set on running without a MAF.
07-11-2009, 11:05 AM
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exactly,,, i m running my 5.3 in my chevelle with niether one of them, temperarly.. spark plugs look perfect to me,.. i'll be running wideband.. i recondmend on getting one if ur tuning urself..
