Help needed for '97 RAV4 part identification [MAP sensor]

flex · 12-23-2009, 07:25 PM

Hi,

I need to identify a part located near the engine. Someone told me I should replace it to reduce pollution.

Can anybody help? What is it exactly? Does a replacement of such part could help in reducing pollution?

It's for an '96 automatic petrol rav4.

Thanks.

[img]/forums/album_pic.php?pic_id=10175[/img]

[img]/forums/album_pic.php?pic_id=10176[/img]

2001SL2 · 12-23-2009, 08:16 PM

I believe that is the MAP sensor, but I am not sure.

calgaryrav4 · 12-24-2009, 12:43 AM

It sure looks like the MAP sensor

Toyota # 89420-42010 correct?

I have never heard of replacing the MAP sensor to reduce pollution before...

mensajero · 12-24-2009, 04:25 AM

You guys are correct, it IS the MAP.

flex · 12-24-2009, 06:08 AM

Thank you for the information.

What is the purpose of such sensor?

2001SL2 · 12-24-2009, 07:12 AM

The sensor measures the changes in pressure (MAP=Mass Air Pressure) in the intake manifold and adjusts the amount of fuel injected accordingly

High pressure = low vacuum = WIde Open throttle
Low pressure = high vacuum = Closed throttle
Throttle plate partially open + high vacuum = engine under load
etc

It is essential for adjusting the fuel mixture and timing

flex · 12-24-2009, 09:44 AM

So, in case of possible malfunction, it may fix pollution problems with better fuel mixture adjustment.

calgaryrav4 · 12-24-2009, 07:28 PM

Quote:

Originally Posted by flex

So, in case of possible malfunction, it may fix pollution problems with better fuel mixture adjustment.

If its not working right your Rav will run very poorly or not at all.

Did you fail an emissions test recently?

flex · 12-25-2009, 03:02 PM

Well, the emission test didn't failed but is really poor.

We tried to disconnect the sensor few seconds during the test and emission went better... I think It may add too many fuel in the mixture adjustment.

The guy at the emission test told me he has already seen that before with another kind of car and the replacement of such sensor had resolved the problem.

The car has been checked by Toyota very recently for some parts replacement and engine check (among other little things). They didn't find unusual things.

calgaryrav4 · 12-25-2009, 05:15 PM

How many Km do you have?

Before jumping into changing the MAP sensor or other sensors, when was the last tune up done?

12-23-2009, 07:25 PM	#1 (permalink)
flex Junior Member Join Date: Nov 2009 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts Feedback Score: 0 reviews	Help needed for '97 RAV4 part identification [MAP sensor] Hi, I need to identify a part located near the engine. Someone told me I should replace it to reduce pollution. Can anybody help? What is it exactly? Does a replacement of such part could help in reducing pollution? It's for an '96 automatic petrol rav4. Thanks. [img]/forums/album_pic.php?pic_id=10175[/img] [img]/forums/album_pic.php?pic_id=10176[/img]

12-23-2009, 08:16 PM	#2 (permalink)
2001SL2 Advanced Member Join Date: Jul 2006 Location: Maryland Posts: 1,962 Thanks: 0 Thanked 1 Time in 1 Post Feedback Score: 0 reviews	I believe that is the MAP sensor, but I am not sure. __________________ Kurt Bored throttle body, Ram Air Intake, 2.5" dia. exhaust, DynoMax muffler, Thrush resonator, 9005 low beams... + more

12-24-2009, 04:25 AM	#4 (permalink)
mensajero Advanced Member Country: Join Date: Jan 1997 Location: Bqtas. Posts: 8,413 Thanks: 0 Thanked 46 Times in 45 Posts Feedback Score: 1 reviews	You guys are correct, it IS the MAP. __________________ http://www.cardomain.com/ride/400637

12-24-2009, 07:12 AM	#6 (permalink)
2001SL2 Advanced Member Join Date: Jul 2006 Location: Maryland Posts: 1,962 Thanks: 0 Thanked 1 Time in 1 Post Feedback Score: 0 reviews	The sensor measures the changes in pressure (MAP=Mass Air Pressure) in the intake manifold and adjusts the amount of fuel injected accordingly High pressure = low vacuum = WIde Open throttle Low pressure = high vacuum = Closed throttle Throttle plate partially open + high vacuum = engine under load etc It is essential for adjusting the fuel mixture and timing __________________ Kurt Bored throttle body, Ram Air Intake, 2.5" dia. exhaust, DynoMax muffler, Thrush resonator, 9005 low beams... + more

12-24-2009, 12:43 AM	#3 (permalink)
calgaryrav4 Senior Member Join Date: Apr 2009 Posts: 849 Thanks: 0 Thanked 0 Times in 0 Posts Feedback Score: 0 reviews	It sure looks like the MAP sensor Toyota # 89420-42010 correct? I have never heard of replacing the MAP sensor to reduce pollution before...

12-24-2009, 06:08 AM	#5 (permalink)
flex Junior Member Join Date: Nov 2009 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts Feedback Score: 0 reviews	Thank you for the information. What is the purpose of such sensor?

12-24-2009, 09:44 AM	#7 (permalink)
flex Junior Member Join Date: Nov 2009 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts Feedback Score: 0 reviews	So, in case of possible malfunction, it may fix pollution problems with better fuel mixture adjustment.

12-25-2009, 03:02 PM	#9 (permalink)
flex Junior Member Join Date: Nov 2009 Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts Feedback Score: 0 reviews	Well, the emission test didn't failed but is really poor. We tried to disconnect the sensor few seconds during the test and emission went better... I think It may add too many fuel in the mixture adjustment. The guy at the emission test told me he has already seen that before with another kind of car and the replacement of such sensor had resolved the problem. The car has been checked by Toyota very recently for some parts replacement and engine check (among other little things). They didn't find unusual things.

12-25-2009, 05:15 PM	#10 (permalink)
calgaryrav4 Senior Member Join Date: Apr 2009 Posts: 849 Thanks: 0 Thanked 0 Times in 0 Posts Feedback Score: 0 reviews	How many Km do you have? Before jumping into changing the MAP sensor or other sensors, when was the last tune up done?

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