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Rb25 Not Starting - Oxygen Sensor Question

cabbie_bro

By cabbie_bro,
in General Maintenance

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cabbie_bro Enthusiast

cabbie_bro

Posted
Posted

If the sensors are faulty would the ECU stop the car from firing?

My RB25 ran fine for awhile then died (sounded like it ran out of fuel). It just winds over now, sounds like it is just bout to kick then starts winding up again.

I have replaced my spark plugs and coil packs (tested for spark), replaced my Fuel Pump and confirmed fuel is getting to the rail and can smell fuel in the cylinder after winding. Checked my timing and valve gaps. Also tested with another ECU incase mine was faulty - same thing occurs (mate was sure it was the ECU)

The only thing i can think off is electrical, i have gone over the loom probably bout 5 or 6 times checking all the terminals and cleaning the contacts and also checking Fuses visually and with a multimeter.

Just thought i would ask incase anyone has any other thoughts before i take it to someone.

mad082 Grand Master

mad082

Posted
Posted

the 02 sensor can be disconnected and the car will drive fine. it generally runs richer when it isn't working properly.

if you turn the car over with 1 of the coils pulled out and with a spare spark plug earth to the engine, does it spark? if it doesn't then it could be the crank angle sensor.

does the fuel pump prime when you turn the key to "on"? you said you have replaced the fuel pump, but if the fuel pump relay is shot then it might not be getting power to it.

also try disconnecting the afm and see if it starts.

cabbie_bro Enthusiast

cabbie_bro

Posted
  • Author
Posted

Sorry what is WOT??

I have tested spark by doing as you stated.

And yes the fuel pump does prime. and confirmed fuel is coming out near rail by disconnecting the feed line and confirming fuel pumps out.

I have also tried using "Start ya Bastard" with no luck.

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