TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

where is the mass air flow sensor?

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Old Sep 19, 2009 | 10:05 PM
  #1  
Stevolwevol's Avatar
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From: Michigan
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI
where is the mass air flow sensor?

I need to know where the maf is located on a 305 tbi. Any input would be appreciated.
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Old Sep 20, 2009 | 04:49 AM
  #2  
thomas1976's Avatar
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From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: where is the mass air flow sensor?

No MAF. The MAP, follow the vaccum hose on the rear of TB (F port) it goes to the MAP, on top of the firewall.
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Old Sep 21, 2009 | 09:10 AM
  #3  
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Re: where is the mass air flow sensor?

Yep.
Your MAP Sensor like said, should be on the firewall on the passenger side of the car.
If I remeber correctly the plug has 3 wires, may be 4 but pretty sure it's 3 wires.
And a single vac line.
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Old Sep 21, 2009 | 11:08 AM
  #4  
Stevolwevol's Avatar
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From: Michigan
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI
Re: where is the mass air flow sensor?

I'll check it out. I replaced the o2 sensor yesterday, and what a pain in the a**.. I got to it from under the car. I am still getting a check engine light. The guy who sold the RS to me gave me an o2 sensor, and said it needed to be replaced, so I replace it. Seems to run good though.
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Old Sep 22, 2009 | 09:38 AM
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: where is the mass air flow sensor?

have you pulled the codes yet to find out what problem the light is saying you have? Throwing parts at a vehicle drains the wallet reallllly quick.
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Old Sep 22, 2009 | 10:22 AM
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From: wisconsin
Re: where is the mass air flow sensor?

As stated pull codes and check for disconnected vac lines or defective vac lines(split)
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