my2monkeys
NAXJA Member
- Location
- Mission Viejo, CA
My 89 is due for CA Smog at a "Star Station" and the Knock Sensor shows a value of "0" on the MT2500 scanner.
The other sensors are all working good and ST and LT fuel trims are + or - 128.
I dont think their test equipment will show the Knock value not being correct
What do you guys think, should I test it anyways?
The connector on the Knock gets old and breaks off the sensor body.
I tried to glue it back together but after researching how it generates voltage
I probably kept it from vibrating and that's why it reads 0 knocks.
Boy, they sure think of crazy ways to design these different kind of sensors.
I can wrap my head around the Potentiometer sensing idea, but like the
Titania o2 sensor, how they discovered these substances will react a certain
way, predictably and reliably is fantastic.
Anyway, I need to smarten up and figure out what affect having 3 ohms of resistance on the 5 volt supply wire does to the resulting volts at the ECU?LOL:hang:
These are things I should have learned in High School :doh:
Didn't care about them back then, "when would I use OHM's Law" I would think.
BTW, since the Knock generates it's own voltage that the ECU interprets, the ECU doesn't send a reference voltage, right?
The Renix Fuel Inj. Manual doesn't go into much detail on the amount of voltage is being produced nor how the ECU measures said voltage.
I'm sure it's obvious to the well learned in electrical theory so any push in the right direction is always well recieved:banghead::dunce:
The other sensors are all working good and ST and LT fuel trims are + or - 128.
I dont think their test equipment will show the Knock value not being correct
What do you guys think, should I test it anyways?
The connector on the Knock gets old and breaks off the sensor body.
I tried to glue it back together but after researching how it generates voltage
I probably kept it from vibrating and that's why it reads 0 knocks.
Boy, they sure think of crazy ways to design these different kind of sensors.
I can wrap my head around the Potentiometer sensing idea, but like the
Titania o2 sensor, how they discovered these substances will react a certain
way, predictably and reliably is fantastic.
Anyway, I need to smarten up and figure out what affect having 3 ohms of resistance on the 5 volt supply wire does to the resulting volts at the ECU?LOL:hang:
These are things I should have learned in High School :doh:
Didn't care about them back then, "when would I use OHM's Law" I would think.
BTW, since the Knock generates it's own voltage that the ECU interprets, the ECU doesn't send a reference voltage, right?
The Renix Fuel Inj. Manual doesn't go into much detail on the amount of voltage is being produced nor how the ECU measures said voltage.
I'm sure it's obvious to the well learned in electrical theory so any push in the right direction is always well recieved:banghead::dunce:
