Which wires on the MAF are for the IAT

Tiny
PINOOCH07
  • 1993 SUBARU IMPREZA
  • 144,000 MILES

I am putting on a resistor chip, to see if it really improves my mileage, but I cant seem to find anyone who knows either where the IAT is or which of the 4 wires on the MAf are for the IAT

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Monday, November 28th, 2011 AT 10:07 PM

19 Replies

Tiny
RASMATAZ
  • MEMBER

For what engine liter? There's a couple of them-

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Monday, November 28th, 2011 AT 10:15 PM
Tiny
PINOOCH07
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1.8

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Monday, November 28th, 2011 AT 10:22 PM
Tiny
WRENCHTECH
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It appears it doesn't have one. You were just wasting your money anyway.

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Monday, November 28th, 2011 AT 10:42 PM
Tiny
RASMATAZ
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Looked at it again on the 1.8 which is the impreza-it doesn't have one-like Wrench said-

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Monday, November 28th, 2011 AT 10:45 PM
Tiny
PINOOCH07
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It does its in the MAF, so what could I do to improve power?

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Monday, November 28th, 2011 AT 10:46 PM
Tiny
WRENCHTECH
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No, it does not. I just looked at the PCM wiring and it does not have an IAT input.

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Monday, November 28th, 2011 AT 10:47 PM
Tiny
PINOOCH07
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Ok, sounds good, So what shall I do to improve power

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Monday, November 28th, 2011 AT 10:51 PM
Tiny
WRENCHTECH
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A minute ago it was mileage that you wanted to improve. Now it's power. They are completely opposite goals and if you get one, you lose the other. You have a computer controlled car. Other than keeping it well tuned, keeping the tires inflated properly and changing your driving habits, your only other option is a different vehicle but first decide whether it's power or fuel mileage that you are after.

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Monday, November 28th, 2011 AT 10:56 PM
Tiny
RASMATAZ
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You want a little power try this -use a 10K's ohms resistor on the coolant temperature sensor harness-There's a lot of ways to improve power but do you have the funding for it?

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Monday, November 28th, 2011 AT 10:59 PM
Tiny
PINOOCH07
  • MEMBER

Sorry to confuse you, the reason I said that was because this "chip" was supposed to do both at the same time. I have already email the company for a return and refund, any car with AWD gets only moderate mileage. So im fine with getting a little worse mileage, but would like to get a little more power for take off.

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Monday, November 28th, 2011 AT 11:01 PM
Tiny
PINOOCH07
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I can fund certain things, but its a 1.8. Only would like to do minor stuff that doesnt require a tear down and rebuild

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Monday, November 28th, 2011 AT 11:04 PM
Tiny
PINOOCH07
  • MEMBER

With the 10k'ohm which I can get for a few cents, I would just connect it to the two wires correct? And will it throw my gauge off? I will donate more for everyone's help, I really appreciate it.

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Monday, November 28th, 2011 AT 11:18 PM
Tiny
RASMATAZ
  • MEMBER

Dunno if it'll spit out a code but the coolant temperature will be affected there'no input signal to the computer -this trick of the resistor it will tell the computer that the engine is still cold and needs fuel-it'll be running in the open loop mode

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Monday, November 28th, 2011 AT 11:35 PM
Tiny
PINOOCH07
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Ok, any other places I can put the resistors?

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Monday, November 28th, 2011 AT 11:37 PM
Tiny
RASMATAZ
  • MEMBER

Dunno on other places-Good Luck

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Monday, November 28th, 2011 AT 11:40 PM
Tiny
PINOOCH07
  • MEMBER

Hi, I was wondering if there is a wiring diagram for the MAF available? The company insists every car since the 1990's has and IAT sensor and they said its combined with my MAF

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Tuesday, December 20th, 2011 AT 11:06 PM
Tiny
WRENCHTECH
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Well, they are wrong. IF it had one, it would be wired to the PCM. They don't publish a diagram for the MAF alone but here are the PCM pinouts and you will see no input for Intake air temp.

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Tuesday, December 20th, 2011 AT 11:35 PM
Tiny
PINOOCH07
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So there isnt anyway that there is any IAT?

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Tuesday, December 20th, 2011 AT 11:43 PM
Tiny
WRENCHTECH
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I don't know any other languages to say that in. THERE IS NO IAT IN THAT CAR.

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Tuesday, December 20th, 2011 AT 11:45 PM

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