What the heck does the S5 Pressure sensor do?
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Joined: Oct 2002
Posts: 3,873
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From: Bothell, WA
What the heck does the S5 Pressure sensor do?
I have been getting a Pressure sensor out of my s5 n/a motor for quite some time now.
The the thing has no broken wires, I tested them with a voltmeter. The sensor could be bad.
Either way I cant idle, and theres 2 things left that could be causing it. The pressure sensor, is one of them.
So what does this thing do? How does it apply to the engine? What happens to you guys if its unpugged?
The the thing has no broken wires, I tested them with a voltmeter. The sensor could be bad.
Either way I cant idle, and theres 2 things left that could be causing it. The pressure sensor, is one of them.
So what does this thing do? How does it apply to the engine? What happens to you guys if its unpugged?
I Raise Chickens
Joined: Jul 2001
Posts: 1,219
Likes: 35
From: Half Moon Bay, CA
Re: What the heck does the S5 Pressure sensor do?
Originally posted by hornbm
I have been getting a Pressure sensor out of my s5 n/a motor for quite some time now.
The the thing has no broken wires, I tested them with a voltmeter. The sensor could be bad.
Either way I cant idle, and theres 2 things left that could be causing it. The pressure sensor, is one of them.
So what does this thing do? How does it apply to the engine? What happens to you guys if its unpugged?
I have been getting a Pressure sensor out of my s5 n/a motor for quite some time now.
The the thing has no broken wires, I tested them with a voltmeter. The sensor could be bad.
Either way I cant idle, and theres 2 things left that could be causing it. The pressure sensor, is one of them.
So what does this thing do? How does it apply to the engine? What happens to you guys if its unpugged?
From what i know about how the s5 ecu works, it doesnt use the MAP sensor to adjust the pulse width along the fuel curve, it still uses the MAF. The MAP sensor acts as sort of a compensation factor. I know for a fact that it will run pig rich if its unplugged. Which, unfortuntely for you, probably isnt the cause of your non-idling problem. I was testing the s5 computer for awhile, and ran with the map sensor unplugged, it was pig rich across the board, but it idles and drove ok.
Joined: Mar 2001
Posts: 31,833
Likes: 3,232
From: https://www2.mazda.com/en/100th/
Originally posted by Scott 89t2
I think it controls timming
I think it controls timming
the fc engine management is like the electronic version of an old british car with a distributor and su carb
mike
Last edited by j9fd3s; Oct 2, 2003 at 08:46 PM.
Thread Starter
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Joined: Oct 2002
Posts: 3,873
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From: Bothell, WA
Re: Re: What the heck does the S5 Pressure sensor do?
Originally posted by cymfc3s
From what i know about how the s5 ecu works, it doesnt use the MAP sensor to adjust the pulse width along the fuel curve, it still uses the MAF. The MAP sensor acts as sort of a compensation factor. I know for a fact that it will run pig rich if its unplugged. Which, unfortuntely for you, probably isnt the cause of your non-idling problem. I was testing the s5 computer for awhile, and ran with the map sensor unplugged, it was pig rich across the board, but it idles and drove ok.
From what i know about how the s5 ecu works, it doesnt use the MAP sensor to adjust the pulse width along the fuel curve, it still uses the MAF. The MAP sensor acts as sort of a compensation factor. I know for a fact that it will run pig rich if its unplugged. Which, unfortuntely for you, probably isnt the cause of your non-idling problem. I was testing the s5 computer for awhile, and ran with the map sensor unplugged, it was pig rich across the board, but it idles and drove ok.
I tested all the wires and they check out ok, but heres the last part I'm not sure about. If my vacuum was too low, could that cause the sensor to throw a code? I currently have about 5-10 inches of vacuum. I'm not sure for a rotary but on a piston engine thats horrible vacuum? How much vacuum should I be reading?
Thread Starter
FD > FB > FC
Joined: Oct 2002
Posts: 3,873
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From: Bothell, WA
Originally posted by Scott 89t2
I think it controls timming
I think it controls timming
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