MAP or MAF Sensor???
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Senior Member
Joined: Dec 2003
Posts: 758
Likes: 1
From: Ontario, Canada
Car: 1988 Pontiac Trans Am
Engine: 5.0L Fuel Injection
Transmission: Automatic 4speed /w OVerdrive
MAP or MAF Sensor???
Hey everyone
This is a complete n00b question however I was wondering. Do TBI based engines have a MAP or MAF sensor? If so where abouts is it located.
Thanks
This is a complete n00b question however I was wondering. Do TBI based engines have a MAP or MAF sensor? If so where abouts is it located.
Thanks
Supreme Member
Joined: Mar 2001
Posts: 6,577
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
MAP
the sensor is located on the cowl, just above the pass. side exaust manifold, it gets its vacume signal from a tube that connects to the back-side of the throttle body.
the sensor is located on the cowl, just above the pass. side exaust manifold, it gets its vacume signal from a tube that connects to the back-side of the throttle body.
Thread Starter
Senior Member
Joined: Dec 2003
Posts: 758
Likes: 1
From: Ontario, Canada
Car: 1988 Pontiac Trans Am
Engine: 5.0L Fuel Injection
Transmission: Automatic 4speed /w OVerdrive
anyone got a good pic of this just so I have a rough idea what I am looking for?
Supreme Member
Joined: Mar 2001
Posts: 6,577
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
it is the only little black box, attached directly to the cowl. it is HARD to miss it.
Supreme Member
Joined: Jan 2002
Posts: 1,322
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From: Bloomingdale,IL
Car: 91 RS
Engine: 305 Tbi (L03)
Transmission: 700r4
Hmm not sure how it would get dirty but a failed map sensor will cause lots of drivability problems. You could test it really easy by using a vacuum pump and a volmeter. You should get readings from 0-5 from atmospheric to about 20in of vacuum.
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Joined: Feb 2001
Posts: 13,740
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
A dirty map will not affect the way your car runs. I bad one will because it will not give the proper readings to determin engine load.
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Posts: 1,843
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From: Chicago, IL
Car: 91 Camaro RS Convertible
Engine: 305 TBI
Transmission: 5-Speed
Axle/Gears: 3.42
What makes you think its the MAP right away thrax? If your car is running rich I would check some other stuff out first. Make sure you get a nice cone from the injectors that's just good to check anyways. I would change the O2 sensor before the map if its running rich.
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