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GM MAF + MAFT (searched), need final answer - can I run that on DD?

3.3K views 31 replies 12 participants last post by  Liquid-tsi  
#1 ·
I spent at least an hour researching about GM MAF + MAFT. I want to run that thing, and I'm not going to get into reasons, but I want to hear a final answer from people who are ACTUALLY RUNNING IT (if your brother's boyfriend ran it, I don't really care what you have to say for it).

My understand is GM MAF (or the translator part) does not read barometric pressure and air temprature - is that true? I'm pretty damn sure those are essential for running a car reliably in any weather (I live in the northwest). Can someone comment on that? Is it true that the car will act differently when, say, it starts raining?

Are there newer version of MAFTs that compensate for that? Or are there way around it?

Also, if the whole thing with "running like shit when weather changes" is true - then how are all GM cars running those sensors?

Please don't go into why running a 2g MAS is better, I really want to hear about the stability/reliability factor of a GM MAF + MAFT. And I don't care about tuning with it - I Have DSM Link for that.

Thank you!
 
#2 ·
I ran one for about a year on my 1g. It was a pain in the ass to tune with. I would tune the car decent and then a day or two later I would have to retune it because out of the blue the tune was way off. When it rained or there was a temperature change of 20 degrees it would run like crap. Yes the intake air temp was locked at a certain value, not sure about the barometric pressure sensor though. I was very unhappy with the unit. Although you always here about people who run it with no problems. I think it is just luck of the draw on how good of a gm maf you get as to whether or not you have success with it. I see there is a maft pro out now but I have no experience with it so perhaps that is a more reliable device.
 
#5 ·
Run it but tune with DSMlink. In this day and age you should have at least dsmlink to tune with. AFC is obsolete IMO. My care idles and runs like stock with GM MAF/Translator, 1600cc injectors and link. Except at WOT of course. :D
 
#6 ·
I ran it in my 1g for like 7 months when I first built it. I was having problems tunning it and was getting horrible gas mileage.

Last weekend I put on my new turbo and decided I would try it again. I put it on, with a BRAND NEW o2 sensor, set everything to base and went out tunning. (its VERY important to have a logger when using a MAFT!!!!) I got the MAFT dialed in pretty close, I have everything running a little rich (98%), I figure that is a little better than a little lean.

For the past week Ive been getting BETTER gas mileage than I was with my 1g MAS. With the bigger turbo and my heavy foot im getting ~24mpg. Ive heard that is pretty good for a 1g AWD.


To answer a couple of your questions, the temp is set to 80.4* and the GM MAF does read barometric pressure. I live in AZ so there isnt that much of a temp change around here so Ive never delt with that problem.

When i was having problems before it was because my o2 sensor was going bad, even though it only had a couple thousand miles on it.

There have been a few people ive know to run the MAFT and have very good results using an AFC to FINE tune the car. DSMLink is a better way to go with the MAFT but if the budget doesnt allow it, what are you going to do ya know...

Im pretty happy with it now that Ive done a bit of research and actually know what im doing when Im tuning it. I have the 3.5" sensor right now but Im looking to change it for the 3" one. Ive heard the 3" is easier to tune with for some reason but not sure.

Im running it in blowthrough and have my BOV vented right now but it doesnt seem any different than when I was using it vented with the 16g.


All in all, some people love it, some people hate it. It depends on your experience and how much you wanna learn about it and play with it.

Thomas
90 TSi AWD
 
#7 ·
Don't do it. There's no need for me to post why. You read all the reasons while searching.
 
#9 ·
The biggest problem I had using the maft was tuning my idle. It was very inconsistent and my low fuel trim varied from day to day. GM vehicles use a intake air temp sensor instead of a fixed number like the maft which keeps air metering more accurate with temp changes.
 
#10 ·
I recently put in my MAf-T after doing all my other mods, probably about a month or so ago.
I am running blow through, because I want to :cool:

I wish I had bought and installed my MAF-T before I did ANY mods to my car, my car runs ALOT better then it did before, better then even stock actually :confused:

However, screw tuning with that pos, I tune solely on my Safc II, and use the MAf-T solely for translation.

Happy cruising :banana:
 
#12 ·
Is it possible that people who are ex-MAFT users simply didn't take the time to set everything up and tune it properly? Because, yet again, I'm hearing mixed responses. Some people are happy, some aren't.

Living in WA, where it rains and is cold one day, and hot and sunny the next - how would MAFT hold up? Or would I need to have 2 different tunes in DSMLink - one for a rainy day, and one for a sunny one? :)

Also, you say that GM Mafs doesn't measure the temperature, and GM vehicles have a separate temperature sensor just for that reason. Is it possible to somehow wire up a GM temperature sensor to the 2g MAS plug, so it would take care of that as well?
 
#13 ·
if you are using link you wont need to worry about tuning the MAFT, you simply zero it out and tune with link. You will just be using the MAFt to convert the signal.

Ive heard they ae making a version of DSMLink that converts the GM MAf, anyone have and info on that?

Thomas
90 TSi AWD
 
#15 ·
There are a few people running the link maft combo and are happy with it. I believe Rippin maybe running this but not 100% sure, i konw he runs the MAFT.

I beleive you can wire in a MAP sensor with link, im not sure about an IAT sensor though.

If you have the eprom ECU and havent bought the link yet there is another route to go, speed density.....

Thomas
90 TSi AWD
 
#17 ·
It could be DD, a lot of cars now aday have speed density rather than maf setups.

Im working on gathering the parts myself to try it out. Ive heards its actually cheaper than link and allows you to tune the same. ive also read it helps you get in touch with your car better, I guess setup is a pain unless you find someone that can give you details on a rough tune.

Thomas
90 TSi AWD
 
#18 ·
gota0have0boost said:
The real question should be, who all here are EX-MAFT users. I am.
Unfortunatly yeah :banana:
 
#20 · (Edited)
EclipseTypeR said:
Please don't go into why running a 2g MAS is better, I really want to hear about the stability/reliability factor of a GM MAF + MAFT. And I don't care about tuning with it - I Have DSM Link for that.

Thank you!
EclipseTypeR said:
Yes I'd like to hear more about the DSMLink and MAFT compatibility.

As for zeroing out the MAFT and tuning with link - wouldn't I still have problems with temperature changes?

Man you really starting to not make any sense at all for being a noob with a link????? Wtf dude if you really want to run a gm maf and maft then just go get it zero it out and be done with it and tune the thing up with your dsm link... wtf are you worrying about tuning the maft if you have a link for? Also there is no magic button for tuning you car perfect every day or for any type of weather it takes time behind the seat and time tuning with your program and that is what makes your car run good not gm maf or link or anything for that matter its the person who is doing the tuning. You dont wana hear it but im going to say it anyway. Yes i got a gm maf with maft plus an safc and now i will be converting to the 2g mas and selling my gm maf and maft ......Why you ask? Simplicity/ Less is more / K.I.S.S. I think you just want to vent to atmosphere :rolleyes:
 
#21 ·
Liquid-tsi said:
Man you really starting to not make any sense at all for being a noob with a link????? Wtf dude if you really want to run a gm maf and maft then just go get it zero it out and be done with it and tune the thing up with your dsm link... wtf are you worrying about tuning the maft if you have a link for? Also there is no magic button for tuning you car perfect every day or for any type of weather it takes time behind the seat and time tuning with your program and that is what makes your car run good not gm maf or link or anything for that matter its the person who is doing the tuning. You dont wana hear it but im going to say it anyway. Yes i got a gm maf with maft plus an safc and now i will be converting to the 2g mas and selling my gm maf and maft ......Why you ask? Simplicity/ Less is more / K.I.S.S. I think you just want to vent to atmosphere :rolleyes:
Well Mr. Genius, I do just want to vent to atmosphere. And I don't really care if any of you consider me a ricer for that, it's my car, and I'll do with it as I choose. I won't just vent without a proper setup, which's why I'm examining the GM Maf route.

As for me not making sense - I'm not as concerned about tuning - it's more that from what I've heard - if I zero out MAFT and tune my car on a sunny day... it will drive like shit the first day it rains... And I want to know if that's true or not... Will my tune just be off by few percent to the point where it's not dangerous to the engine and I'm only loosing 5-10 HP, or will it A/F be jumping all over the place?
 
#22 ·
EclipseTypeR said:
Well Mr. Genius, I do just want to vent to atmosphere. And I don't really care if any of you consider me a ricer for that, it's my car, and I'll do with it as I choose. I won't just vent without a proper setup, which's why I'm examining the GM Maf route.

As for me not making sense - I'm not as concerned about tuning - it's more that from what I've heard - if I zero out MAFT and tune my car on a sunny day... it will drive like shit the first day it rains... And I want to know if that's true or not... Will my tune just be off by few percent to the point where it's not dangerous to the engine and I'm only loosing 5-10 HP, or will it A/F be jumping all over the place?
Well why didnt you say so? I will be selling my 3 inch gm maf and maft wana buy it?
 
#26 ·
Liquid-tsi said:
Oh dude wait im sorry i should have looked at your car. You have a 2g i have a 1g i dont think my maft will work for your car. I believe they make a maft for 2gs sorry:( .
There's a dipswitch on the Translator for 1g/2g. You just have to cut the 1g plug off and solder on a 2g plug or just hardwire the Translator to your factory harness.