R32 Gts-t Temp Sensors

[ashr32]

Hey guys,

ive done my major service including thermostat and rad hoses.

i also put in a Spec M 52mm alloy radiator in prep for track this year but here is the problem.

the car is running hotter. ive bleed the air out 10+ times so its not that and the car doesnt overheat its just hotter

i have an aftermarket temp gauge which is connected to a greddy alloy top rad pipe and it reads 80 once warm but at the lights

it gets upto 90ish which is about 5 degrees hotter than before.

ive noticed also that it doesnt cool down as much when im do 100km like it did before.

the stock gauge reads as it always does (right in the middle) and when i pluged in consult it shows the temp to be about 10 hotter than the aftermarket gauge. but that means at the lights at idle its really 100 degrees

so its gone from running temps of 76ish to 80 to a new radiator that sez its 30% more efficent and upto 100 degrees

i know the radiator is good so i was thinking maybe its because the rad is alloy not plastic so the gauge sensors are getting hotter by defualt?

secondly i have a bad mis once warm and ive checked everything else, coils, plugs, afm ect.

so i thought it could just be the standard temp sensor so i call nissan and they said i have 2.

1 for the gauge and one for the ECU. im guessing the gauge sensor is connected to the bottom of the rad

but where is the other and which should i replace if any???.

from nissan

The sensor for the guage is $59

The sensor for the ECU is $85.

any ideas guys?

extra info

im using the stock shroud. no leaks no problems with the colour of the fluid

[blind_elk]

The sensors are located on the top pipe, near the head. They are not mounted in the radiator itself.

You're running tha factory fan? And the stone tray underneath?

[ashr32]

The sensors are located on the top pipe, near the head. They are not mounted in the radiator itself.

You're running tha factory fan? And the stone tray underneath?

hey

yeah using the stock fan with no stone tray.

there (IS) a sensor at the bottom left side of the radiator next to the bottom radiator pipe

the radiator is plug and play so all the stock stuff is retained

regardless can a temp sensor cause a mis? how can i test? i have consult if that helps?

cheers guys

SAU - keeping my car on and off the road since 2007!!!

[Bliksem]

Yes, its possible that it "could" cause a miss. It can cause the ECU to run rich as it thinks the motor still hasn't reached opperating temp and will stay in warm up mode. You will usually also get poor fuel economy with this too. Should be able to use consult to find an error code if theres a sensor out.

Edited January 7, 2009 by MintR33

[blind_elk]

Ok, try putting the stone tray back on. It will help reduce the ability for air to not go through the radiator. You need to make sure that as much air as possible goes through the radiator - it's not going to cool anything if it simply slips out underneath the car.

Also, consider this: your new radiator is nearly twice as thick as the factory unit. It might be possible that the air traveling through the radiator gets too hot in the front half of the fins, and therefore can't draw as much heat in the rear half, leaving the coolant only partially cooled.