does a downpipe cause a check engine light?
#1
does a downpipe cause a check engine light?
Just picked up a new to me FD. The check engine light comes on and goes off suddenly, seems like there's no pattern. It's not with every drive either. I know that the car does not have a precat...could this be the cause?
I'd like to add that the car seems to drive perfectly...good boost, smooth transmission, very quiet, no rattling or shaking
I'd like to add that the car seems to drive perfectly...good boost, smooth transmission, very quiet, no rattling or shaking
#6
I got a 15 and 16
15 Oxygen Sensor - <0.55 volts for 25 secs in closed loop zone
16 EGR Function Sensor - open or short circuit
Would one just go about changing these? Should I change the O2 sensor on both the downpipe and the main cat?
Same with EGR? Or does it represent another problem?
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#10
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yeah the EGR valve doesn't do anything except keep the CEL off....
#11
Sharp Claws
iTrader: (30)
the EGR was only put on the car to keep the tree hugging california hippies off their asses so they would be compliant with the necessary equipment regulations that the state required in order to put the cars on the market.
of course mazda did, and made the system virtually non-functional to spite the tree huggers.
teheehee
of course mazda did, and made the system virtually non-functional to spite the tree huggers.
teheehee
#15
RX-7's since 1980
iTrader: (4)
I got the integrated circuit from mouser and the small pc board and case from radio shack. If you can solder wires its easy. There are 4 wires on the stock ECU plug that you need to tap into.
1B and 40 for the coil/4D and 3J for the contact. They wire directly to the 4 pins on the IC chip, no other parts are needed.
1B and 40 for the coil/4D and 3J for the contact. They wire directly to the 4 pins on the IC chip, no other parts are needed.
#16
I got the integrated circuit from mouser and the small pc board and case from radio shack. If you can solder wires its easy. There are 4 wires on the stock ECU plug that you need to tap into.
1B and 40 for the coil/4D and 3J for the contact. They wire directly to the 4 pins on the IC chip, no other parts are needed.
1B and 40 for the coil/4D and 3J for the contact. They wire directly to the 4 pins on the IC chip, no other parts are needed.
Where is a good source for o2 sensors, fuel filters, and the like?
#19
RX-7's since 1980
iTrader: (4)
you can go aftermarket with a generic type, but you will need to change out the connector and splice the wires. A rx7 specific aftermarket or Mazda part will be plug and play.
check here: universal denso $16, rx7 specific $44
http://www.densoproducts.com/resultsApp.asp
check here: universal denso $16, rx7 specific $44
http://www.densoproducts.com/resultsApp.asp
#20
you can go aftermarket with a generic type, but you will need to change out the connector and splice the wires. A rx7 specific aftermarket or Mazda part will be plug and play.
check here: universal denso $16, rx7 specific $44
http://www.densoproducts.com/resultsApp.asp
check here: universal denso $16, rx7 specific $44
http://www.densoproducts.com/resultsApp.asp
#21
Recovering Miataholic
Here is a circuit diagram for the "EGR delete" which keeps the CEL light off after the EGR valve is deleted (i.e. after EGR sensor connector is disconnected). Mine is mounted next to the PCME (ECU) behind the right-side cabin panel. This circuit is just a phase inverter, i.e. when PCME terminal 4O is "high," terminal 3J is "low." The same function can be provided with a switching transistor if you like.
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