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Author
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Topic: mass air meter adjustment
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speedy
Gearhead Posts: 92
From: Parkersburg WV
Registered: Nov 99
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posted 10-19-2000 08:19 PM
   
I read somewhere to adj. the mam, oblong the holes and use a multi meter to get the best performance. Does anyone know the readings I should get?Thanks,Andy.
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Stewart
Pit Boss Posts: 3620
From: Monterey, CA Mustangsandmore Member #437
Registered: Apr 2000
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posted 10-19-2000 11:16 PM
Speedy, are you referring to the sampler tube...the opening leading to the heated wire with which the computer uses to detect changes so as to determine the amount of fuel to mix with the air? Because if you are, everything I've read has said DON'T do it. Basically what I've heard is that if you mess with that, you're asking for lots of trouble.There may be an easy way, I dunno, for I am far from an authority, so hopefully the "guys who know" can answer better than I'm able. But from what I've read from different sources, if the correct ratio of sampler opening isn't exactly matched up with the rest of the induction system, then you'll get false readings and a terrible running engine. Guys? Stewart PS - Why do you want to do this anyway? [This message has been edited by Stewart (edited 10-20-2000).]
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jimb
Gearhead Posts: 106
From: s. holland, il usa
Registered: Nov 99
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posted 10-20-2000 09:11 AM
I saw an add that runs in many of the Mustang mgazines by a company called Interactive Technologies, I hope I got that right. They sell what they call an "Air Adjuster". You are supposed to be able to adjust the voltage of the mass air meter to the computer with it. It sounds like what you are trying to do but only by changing the imput to the meter (Air through the sampling tube). I think is costs about $140-150. It works with any and all Mass Air meters, stock or aftermarket.
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Gearhead
Gearhead Posts: 569
From: The Rock, Crazy Canuckland, 1979 Indy Pace Car
Registered: Mar 2000
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posted 10-20-2000 02:29 PM
Andy, I think that you are referring to adjusting the TPS (Throttle Position Sensor). This sensor can be found on top of the throttle body (little black unit with a couple of wires hooked to it) and you can loosen the screws holding it down to "adjust" the settings a bit. Supposedly the setting should be in the 0.95-0.98V range for optimum performance. In order to get these readings some people do have to open up the holes a bit so that they can rotate the sensor beyond what the stock sized holes allow. From what I have heard the gains by doing this are pretty much unnoticeable.Don't mess with anything on the MAF sensor (right after the airbox)!! This could cause major problems if you don't know what you're doing (and even then they are very sensitive). ------------------
Cheers,
Ian
M&M Member #395
---------------
'79 Mustang Indy 500 Pace Car
Ian's Pace Car Page
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Capri
Pit Boss Posts: 918
From: Lyons, ILL, USA
Registered: May 99
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posted 10-22-2000 04:58 PM
The trick is 1.0 volt and this is on the TPS.Tony.
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Stewart
Pit Boss Posts: 3620
From: Monterey, CA Mustangsandmore Member #437
Registered: Apr 2000
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posted 10-31-2000 08:11 PM
Hey Speedy! What's the scoop? Did any of these answers help? Did you already do the work? How'd it work out??Inquiring minds want to know!!  Stewart 
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