obviosly different names are used for the sensors, as in the 4 years of automotive engineering that i have done and the further 2 years of working in the industry as an EFI technician, I have never heard of a pyrometer, all australia manufactured EFI engines have a sensor located on the exhaust manifold called a KNOCK sensor, it is used to read temperatures relating the combustion chamber, I should know I spent most of today of work helping my GF replace the factory exhaust manifold on her car with extractors, i had to purchase a brand new KNOCK sensor because the factory one would not fit the new manifold.
I not sure if they use different names but I'm telling you want is the go here in australia, I walked in to my local repco and asked for a KNOCK sensor to suit a 1997 EL falcon fitted with a 4.0litre EFI engine, the guy at the counter replied, is it for the factory manifold or extractors, i told him what is was for, we swapped money for the product, i went home and fitted it, the car runs fine, end of story!
BS....Knock sensor is in the block or intake. O2 sensor is exhaust. Doesn't matter where you are.
the only sensors located in the block of any engine that i own is the crank angle sensor and the oil pressure sender unit.
Google is your friend. I thought you knew how they worked. They can also be located on the head.
OK here is what i found according to the Gregory's maintanence manauls.
the knock sensor can be found in several locations, in the block, in the head, and the exhaust(in place of an O2 sensor depending on what engine it is) I had a look at the manaul for my 1986 ford faclon and my GF 1997 falcon so here goes.
this is quoted for the 1986 Ford XF Falcon S PACK fitted with the 4.1litre Multipoint EFI engine. pg 279 supplemental
"KNOCK SENSOR
The electronic fuel injection system on unleaded petrol models remains basically the same as that on leaded petrol models except for the addition of a knock sensor.
The knock sensor is mounted on the right hand front(exhaust side) of the cylinder head and is connected to the electronic control assembly.
the purpose of the knock sensor is to prevent engine detonation occurring when the engine is under load.
When the knock sensor detects an increase in combustion temperature due to engine detonation it sends a signal to the electronic control unit and the control unit will retard the spark to prevent detonation."
1997 Ford EL Falcon GLi fitted with the 4.0litre OHC multipoint EFI engine with computer control torque. pg 208 emissons control
"KNOCK SENSOR
The knock sensor works the same as previous models with the exception that it is located above the exhaust flange to aid with better detonation detection due to rapid temperature increases cause by detonation within the combustion chamber.
In vehicles fitted with the Tickford 4.0litre OHC engine an O2 sensor is fitted in place of the knock sensor and the knock sensor is located in the right hand side of the cylinder head (exhaust side) as with previous models"
the knock sensor can be found in several locations, in the block, in the head, and the exhaust(in place of an O2 sensor depending on what engine it is) I had a look at the manaul for my 1986 ford faclon and my GF 1997 falcon so here goes.
this is quoted for the 1986 Ford XF Falcon S PACK fitted with the 4.1litre Multipoint EFI engine. pg 279 supplemental
"KNOCK SENSOR
The electronic fuel injection system on unleaded petrol models remains basically the same as that on leaded petrol models except for the addition of a knock sensor.
The knock sensor is mounted on the right hand front(exhaust side) of the cylinder head and is connected to the electronic control assembly.
the purpose of the knock sensor is to prevent engine detonation occurring when the engine is under load.
When the knock sensor detects an increase in combustion temperature due to engine detonation it sends a signal to the electronic control unit and the control unit will retard the spark to prevent detonation."
1997 Ford EL Falcon GLi fitted with the 4.0litre OHC multipoint EFI engine with computer control torque. pg 208 emissons control
"KNOCK SENSOR
The knock sensor works the same as previous models with the exception that it is located above the exhaust flange to aid with better detonation detection due to rapid temperature increases cause by detonation within the combustion chamber.
In vehicles fitted with the Tickford 4.0litre OHC engine an O2 sensor is fitted in place of the knock sensor and the knock sensor is located in the right hand side of the cylinder head (exhaust side) as with previous models"
ummmm....that says it is in the head. Please provide something that says it can be located in the exhaust.
That's because Techron® is Chevron's detergent. There are lots of other detergents out there, and all gas has detergent in one form or another.
We need an auto forum here. :evil:
I realize all gas has to have a minimum cleaning additive in it, but how much per grade of gas from the same brand will vary. I know that Chevron supreme has more adds than the regular, and that Shell V-power (supreme) has 5x the mandated level of additives. But, both Shell and Chevron, with Shell being the most recent, are TopTier rated for their gasoline.
Your response doesn't make sense, i stated my original statement rather clearly, but i'll repharse: You buy gas from BP for example. Of course all the grades there at BP are going to have adds in them, [and different brands of gas have different adds compared other retailers]. But, amongst the BP grades, reg, mid, prem; each grade may have a different amount/level of adds compared to each grade of the same brand of gas.
Yes but some is far better than others. Techron exceeds current EPA requirements and is the first to meet the higher standards set by manufacturers.
:thumbsup:
It's worth noting that more additives don't necessarily give you anything extra and can even be detrimental to performance. They're a good marketing gimmick, if nothing else, but I would be very hesitant to buy a gas based on the advertised amount of additives. For example, I have found that I get better gas mileage with Shell, for example, but not by 25% as advertised.
Actually I qouted the wrong person. I meant to quote the "that is illegal" post. Even with the same supplier the amount of detergent varies by grade. It just can't go below approved levels.
OK, here's the deal. You are not an idiot...your manual is just confusing. What it's saying is that the knock sensor measures engine knock and the primary cause is increased cylinder temp. It can be mounted anywhere that is solidly connected to the engine like the exhast manifold, intake manifold, engine block, ect...it is measuring vibrations.
To test the veracity of my statement, connect a timing light if the vehicle has a distributor, for DIS connect a scan tool and observe ignition timing. Now rap sharply on the engine with a wrench or screw driver and observe the resultant timing. End of experiment.
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