Ported TB and MAF!!! Now have problems...
06-12-2006, 03:18 AM
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Ported TB and MAF!!! Now have problems... Well, the MAF was semi ported before, but I had a buddy polish it up some more as well as porting the TB.
When I drive the car around now and get on it...it won't downshift, and the converter just locks letting the car casually rise in RPM's. With the research tonight, I can assume with my A4 that I either ported the MAF too much, or something else is wrong with the car. I should have just left the MAF alone. It was already descrened and everything before. Never had any problems! My car idle's now at 1300 rpms
Maybe I need to set my idle screw down a bit, or just get it retuned.
Anyone??
When I drive the car around now and get on it...it won't downshift, and the converter just locks letting the car casually rise in RPM's. With the research tonight, I can assume with my A4 that I either ported the MAF too much, or something else is wrong with the car. I should have just left the MAF alone. It was already descrened and everything before. Never had any problems! My car idle's now at 1300 rpms
Maybe I need to set my idle screw down a bit, or just get it retuned.
Anyone??
06-12-2006, 11:04 AM
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Well, first, just look under the hood, make sure everything is plugged in, no vaccum leaks (especially around the throttle body/maf area).
After that, Unplug the maf and start the car (don't drive around, I've read that it makes the tranny pressure 100% all the time), if it starts and idles ok, then you know it's the MAF causing these problems. The car will converter to speed density and will run fine without the MAF.
If it still idles high, try plugging the hole in the thottle body blade (preferably with something that won't get sucked in, like a bolt+screw, or if you're brave a real sticky piece of tape), my guess is that it was ported too far and too much air is getting by, which could cause the high idle problem.
And as for your ported MAF, either find a way to tune for it, or get rid of it. I put one on my car and it made the a/f go into the 14's (not good,
) I used a maf translator and set it to 6% rich at WOT just to get it back down to a good a/f.
After that, Unplug the maf and start the car (don't drive around, I've read that it makes the tranny pressure 100% all the time), if it starts and idles ok, then you know it's the MAF causing these problems. The car will converter to speed density and will run fine without the MAF.
If it still idles high, try plugging the hole in the thottle body blade (preferably with something that won't get sucked in, like a bolt+screw, or if you're brave a real sticky piece of tape), my guess is that it was ported too far and too much air is getting by, which could cause the high idle problem.
And as for your ported MAF, either find a way to tune for it, or get rid of it. I put one on my car and it made the a/f go into the 14's (not good,
) I used a maf translator and set it to 6% rich at WOT just to get it back down to a good a/f. 
