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#1
10-31-2007, 10:39 AM
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3.1 V6 MAF Sensor Location
I wonder where would be the Mass Airflow Sensor (MAF) located on the 3.1 V6 engine.
I have a rough idle issue and already changed the injectors, spark plugs and EGR valve to no avail. The vehicle runs good at higher rpm and pulls well otherwise but shakes terribly at idle after reaching engine operating temperature. Reading on this forum I've heard that the MAF sensor or IAC valve might be the cause but I can't find the MAF sensor on my engine. Do you know where it's located and how can I test it before I change it? 
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#2
10-31-2007, 02:31 PM
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Re: 3.1 V6 MAF Sensor Location
THere is no MAF sensor on this 3.1. THis one uses a MAP sensor...Manifold Absolute Pressure...What year...if before 94 1/2, you can flash the codes if any...www.avigex.ca/xport/readingcodes.jpg
__________________
'93 Ponty Transport 3.8; 2011 SUzuki SX4 AWD (wife's) ; 2015 Sorento 2.4 AWD 1928 Graham Paige Model 629 I don't believe in miracles.
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#4
11-01-2007, 07:58 AM
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Re: 3.1 V6 MAF Sensor Location
The MAF sensor is a static device and eventual dirt will not change the pressure reading. Failure should pop a code...but I have experience of "partly" failed sensors that do not pop a code...
www.avigex.ca/xport/roughidle31_1.jpg www.avigex.ca/xport/roughidle31_2.jpg www.avigex.ca/xport/map31_1.jpg www.avigex.ca/xport/map31_2.jpg
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'93 Ponty Transport 3.8; 2011 SUzuki SX4 AWD (wife's) ; 2015 Sorento 2.4 AWD 1928 Graham Paige Model 629 I don't believe in miracles. Last edited by LMP; 11-01-2007 at 08:39 AM.
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#5
11-01-2007, 10:10 AM
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Re: 3.1 V6 MAF Sensor Location
Thanks for the links. They've been very helpful!
These are pages from the Repair Manual? Can you tell me where I can find the rest of it? There are some refferences I would like to pursue further.
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#6
11-01-2007, 10:41 AM
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Re: 3.1 V6 MAF Sensor Location
These are pages scanned from my '93 repair manual and also some provided by other forum members.
a lot of other pages available from here: www.avigex.ca/xport/index.doc this linked index is not totally up to date however. more up tpo date here www.avigex.ca/xport/index.txt but you have to copy the file names into the address bar YOU can also go to autozone.com and browse to your vehicle. The info is sometimes irrelevant or imprecise though . If you want very good parts description/availability/price. try www.rockauto.com
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'93 Ponty Transport 3.8; 2011 SUzuki SX4 AWD (wife's) ; 2015 Sorento 2.4 AWD 1928 Graham Paige Model 629 I don't believe in miracles.
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#7
11-02-2007, 03:21 AM
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Re: 3.1 V6 MAF Sensor Location
Thank you for the excellent info you provided!
I'll browse through it this weekend until my own hard-copy Pontiac Trans Sport Repair Manual arrives. I've visited autozone's repair info but, as you said, sometimes the info there is too inaccurate to be useful. Rockauto.com is my part supplier too, I reccomend them for excellent service and pricing.
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