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Bad maf?

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Old Aug 31, 2016 | 12:45 PM
  #1  
Swoop Dogg's Avatar
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Default Bad maf?

Excuse the detail, just want to make sure I mention everything since my issue started.

Last week I came back from a small road trip. No issues. The night I returned, I had to have my buddy jump me as I left my emergency blinkers on (toggling it to fix blinker). I finally got it jumped and it ran very, very rough/choppy. I hobbled it home, giving the cold engine gas when it was in neutral to make sure it didn't stall out. I made it home and once it was warm it ran a bit better. Pulled codes and it was p0171 and p0174. Next morning when I went to check on it, I noticed my air bridge right before the tb was loose. Like very loose. I tightened it up, and it did feel better but not quite. I let it do idle relearn. Seemed to feel ok. But that's it. I ended up cleaning the maf just in case. Car doesn't seem to lack for power once it gets into rpms, but will dip below idle when I come off the gas. I sprayed carb cleaner, but didn't find any leaks. Could the maf have gone haywire? I hear these cars don't like jumpstarts, and the codes/rough idle started immediately after.

I'm kind of lost on what to do. I may try idle relearn the fuse box way see if that helps. Still keeps throwing p0171 and p0174. I've attached a picture of my maf. The one on the left looks "dirty" and looks slightly inset as opposed to the other two which are fairly flat.

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Old Aug 31, 2016 | 12:49 PM
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Those codes would be lean codes on both banks. Double check on any vacuum leaks.
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Old Aug 31, 2016 | 08:12 PM
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Not thinking it's your MAF. You'd have a P0102 and other possible codes... You have an air leak, almost guaranteed. Take apart your entire intake, from the TB to the filter, and make sure everything is leak free, and check for cracks in any air connections. Too tight on clamps can cause the same issue as too loose; make sure you didn't compress the air bridge or bellows.
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Old Sep 1, 2016 | 04:58 AM
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Well I think I resolved my issue. I believe it was my vararam filter. I pulled the maf to clean it (and snap that pic) and while I had it out I decided to check the filter. Wow. Dirt literally caked on and a lot of it. The filter media also was separated on one side. I had some foam tape, so I reinforced on the opposite side which applied enough pressure to not let the filter collapse and put it back together. Initial drive showed no issues, and the subsequent drives were good as well. No hesitation, no rpm dips, no codes.

Didn't get a chance to snap a pic of the filter, but you can see the dirt all along the curb. Small piles. Gonna have to purchase a new filter this week
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Old Sep 2, 2016 | 09:01 PM
  #5  
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Did you get the cleaning kit with the vararam filter ?

I just put on a new vararam intake and bridge and got the
Idle dips you speak of
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Old Sep 2, 2016 | 09:25 PM
  #6  
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Right now, no. I just called vararam to speak to them, as my thoughts confirmed I had the old style filter with the foam filter. P/O installed so wasn't sure. They are shipping me out a new upper box and green filter.
Do you have codes? It seemed like my p0171 and p0174 lean codes were from clogged/collapsed filter letting more air in.
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