Red Light On Dash?

[senilykSkylines]

Hi there,

My car is an R33.

I've looked but I cannot find any info.

I noticed the other day that when I flicked on the air con a red light came up on the right hand side of the dash. It had what looks like heat waves coming off a pipe like figure.

It only comes on when I turn the air con on. When I turn it off it disappears. Is it somethin to worry about? I wondered if it was some kind of exhaust sensor that has been disconnected when I had my 3" put in.

cheers,

Dan

[Moodles2]

Sounds like the catalytic converter temperature warning light, PowerFC use it to indiciate engine knocking

[senilykSkylines]

Sounds like the catalytic converter temperature warning light, PowerFC use it to indiciate engine knocking

Oh ok, would make sense because I took out the cat... being from NZ.

[89CAL]

power fc uses the check engine light to indicate knock by flashing it several times in a short space of time

if its the cat convertor overheat warning then there may be a wiring issue or maybe it was just unplugged when something was done/replaced

[senilykSkylines]

power fc uses the check engine light to indicate knock by flashing it several times in a short space of time

if its the cat convertor overheat warning then there may be a wiring issue or maybe it was just unplugged when something was done/replaced

The light will come steady on and maybe flick off for a bit after a while, and then turn on again. I have a Z32 computer installed not a powerfc.

[89CAL]

Yeah that's fine was just correcting the previous post.

That's a bit strange. The sensor should bring up a warning (that red light) when excessive temperature is noted in the cat. Sometimes this happens with a stock exhaust when the car dumps fuel into the engine at higher then normal boost levels. But since yours has a 3 inch exhaust I wouldn't think so

Sounds more like a wiring problem, or perhaps the sensor is old and as the wires heat up it's creating to much resistance, but again that doesn't explain why it's only doing it when you turn the air con on. Unless your z32 ecu is throwing to much fuel in when the air con is on, perhaps putting it into a rich and retard mode, I'm not sure.

Does the car drive ok when the ac is on and it does this? Maybe just check the sensor and wiring under the car just as a start. But it doesn't sound like anything to be concerned about

[senilykSkylines]

Yeah that's fine was just correcting the previous post.

That's a bit strange. The sensor should bring up a warning (that red light) when excessive temperature is noted in the cat. Sometimes this happens with a stock exhaust when the car dumps fuel into the engine at higher then normal boost levels. But since yours has a 3 inch exhaust I wouldn't think so

Sounds more like a wiring problem, or perhaps the sensor is old and as the wires heat up it's creating to much resistance, but again that doesn't explain why it's only doing it when you turn the air con on. Unless your z32 ecu is throwing to much fuel in when the air con is on, perhaps putting it into a rich and retard mode, I'm not sure.

Does the car drive ok when the ac is on and it does this? Maybe just check the sensor and wiring under the car just as a start. But it doesn't sound like anything to be concerned about

Hey thanks for the reply.

I will be seeing my tuner this weekend for other reasons, but I can check it out with him to see if it is the result of his tune. The car drove fine when i had it on A/C but I never really left it on for a long period once I had noticed it.

I don't even have a cat anymore so I would say that is nothing important also. It is just weird with the air con turning.

cheers,

Dan

[89CAL]

probably just a wiring fault then. Might just be earthing the wire for the cat sensor when the AC compressor is cutting in and out or something. Just check to see what they did to the sensor when they replaced your exhaust

[senilykSkylines]

Turned out to be incorrect wiring with a pin from the Z32 ecu swap. Being one of the last R33's made the pin was different.