maf directly to filter
10-21-2013, 05:04 PM
#21
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With the maf plugged it it idles ok for 10-20 seconds or so then wants to die, it coughs for a bit and starts the cycle over again. When I give it gas it wants to die and as soon as I let off of the throttle it revs up a bit. As soon as I unplug the maf it starts behaving fine. I did have a spare maf to try but it was recently thrown out... Right now, I don't have one on hand, but I may try to snag one from a relative's vehicle. It would still be a truck maf, but at least it's something.
Engine is stock save for headers and now the CAI.
Keep in mind, this hasn't been tuned at all and the engine, trans, maf, pcm, just about everything was bought separately. I didn't think that would matter that much since they should all match well enough, but this is my first LS swap so I'm not really sure.
Engine is stock save for headers and now the CAI.
Keep in mind, this hasn't been tuned at all and the engine, trans, maf, pcm, just about everything was bought separately. I didn't think that would matter that much since they should all match well enough, but this is my first LS swap so I'm not really sure.
10-22-2013, 08:44 PM
#24
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My thoughts are having that much turbulence both right before and after the MAF can't be good. Neither are ideal in the first place but combining them might make it worse.
If you do this setup do not even think about removing the screen from the MAF. You might invest in a Saxon maf screen to further help get clear MAF readings. My idle seems more solid since I installed mine. For like $15 it can't hurt
http://www.saxonpc.com/100mm-cells-for-100.html
If you do this setup do not even think about removing the screen from the MAF. You might invest in a Saxon maf screen to further help get clear MAF readings. My idle seems more solid since I installed mine. For like $15 it can't hurt
http://www.saxonpc.com/100mm-cells-for-100.html
10-24-2013, 10:57 AM
#25
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Haven't gotten around to logging yet, but it just occurred to me that the two o2 sensors I am using are used. My brother grabbed them from his work from cars that had them replaced. He said they worked, but he didn't know how long they would last. Would bad 02 sensors cause this problem? My thinking is that if they communicate with the PCM about fuel trimming based off of the MAF then the PCM tables wouldn't change if the MAF wasn't plugged in. Am I along the right lines?
