maf mod

[4g63rice]

I have a 1g fwd tsi
Will removing only the lower honey comb "only" effect my idle still?

[JoeShmoe]

Don't know. But I would think your car would seriously run like shit if you took it off.

[SilvrEclipse]

This was taken from the vfaq site about removing the lower part of the maf on a 1g.

Update 09/15/99. I am glad that I chose to remove the lower chamber in a manner that allowed me to put it back in, because after over a month of screwing around with fuel pressure, the AFC, and idle control, I finally decided to put the lower chamber back in to see what would happen.

I had been having low speed drivability problems. When the rpms would fall from 4k or above, the ISC was not able to catch it, and the car would die over half the time. I set the base idle to 1100 rpm, and it didn't die anymore, but it did have a bit of a surging problem, but not too serious. I drove it like this for many weeks. It also was very "jerky" at low speeds and throttle positions less than 10%, the car would start bucking, requiring continuous clutch finesse at parking lot speeds.

I decided the 1100 rpm idle and +/- 500 rpm surging was just not my "style" so I messed around with everything trying to make it better. I put the lower chamber back in and lowered the idle to 750 and blammo everything worked like a "stock" car.

So my finally diagnosis is that with the lower chamber removed, at low airflow rates the air would easily flow through the "hole" and hardly any of it would go through the MAF counter, as a result, I had all of the problems above. At high airflow rates, a great deal of air would get sucked through the MAF counter, even though it was more restrictive, and it could be tuned. Many people design some kind of "flapper" so that at low airflow rates the air is forced through the MAF counter and at high airflow rates, the flap opens and air can go through both chambers. I haven't explored this idea yet. I think I am just going to leave the lower chamber in there and start looking for a 2G MAF.

Randy Nuckels

[JoeShmoe]

Thanks for the assist Jay.

[2.3L_turbo]

dam looks like i shud put mine back in lol glad i kept the lower one in good condition lol the top one got all messed up hey will that hurt my motor at all lol

[4g63rice]

will removing the lower honey comb, make my check engine light on??

[SilvrEclipse]

No you should not get a CEL.