P11 Temperature Rising..HELP!!!!!

G-DUB

Hey ppl i`m in desperate need of some help here. I have a P11, sr20ve engine...the car is parked up most of the time..I just start it now and then to make sure everything works. Recently sometimes when the car is idling the temp raises to about 3/4 or a little above that just before the fan comes on and drops back down to normal working temp after. It keeps doing this in cycle and I don`t know what could cause it. Then again sometimes the car works fine. If i turn on the AC the temp remains on normal working temp. The radiator nor engine has any leaks, I use coolant, the fans work and I tried changing the rad cap but still works the same way. Any help would be greatly appreciated...Thanks.

Goolie · Posted: Fri Nov 06, 2009 12:56 pm Post subject:

coolant temp sensor.. look into that. thermostat could also be sticking due to it corroding as the car is parked up most of the time.. look into both these things..

G-DUB · Posted: Fri Nov 06, 2009 1:04 pm Post subject:

Ok I not to long take out the thermostat and it not corroded..almost looks new. I tested it in some boiling water and it opening and closing. Where would the coolant temp sensor be located and how do I check to see if it operating normal?

Goolie · Posted: Fri Nov 06, 2009 1:30 pm Post subject:

sometimes these things do go bad (the sensor) and may need changing.. i cant tell u off hand where the sensor is in the VE motor, i'll have to wait till my bro comes home dis evening to check it.. but its a two pin sensor, when u unclip the jack, both fans should come on when the engine is on. look behind the engine close to the water pump side, but on the intake manifold side..

Anil_Sooknanan

G-DUB · Posted: Tue Nov 10, 2009 8:19 am Post subject:

Hey Anil why don`t you give me your views on what you think or know the problem is and I can try and fix it myself. I would appreciate that.

fordfanatic · Posted: Tue Nov 10, 2009 8:45 am Post subject:

do these cars carry a fan switch? if the auxilary fan coming on and keeping the cool then the normal fan just not coming on at the right time...... never worked on one of these cars so i have no idea if it has one or where it is located...... just throwing outr some idea for u.

G-DUB · Posted: Tue Nov 10, 2009 8:51 am Post subject:

I not sure on the fan switch..but it has 2 fans, one is for the AC and the other is for the radiator. Both of them working.

A-1 Superior Tech · Posted: Tue Nov 10, 2009 9:31 am Post subject:

these wont be the 2 speed fans? The temp sensor is easy to find, the ve i have here, its on the back by the throttle body area, you'll see a single wire screwed on one of the pipe thingy

G-DUB · Posted: Tue Nov 10, 2009 9:39 am Post subject:

I know where the temp sensor is...A-1 Superior Tech is not the single wire one that is the temp sensor that one is the temp sender unit it have a 2 wire unit next to it, that one is the temp sensor unit. But how the hell you does know if that bad and causing the problem? Is there a way to test it?

fordfanatic · Posted: Tue Nov 10, 2009 9:39 am Post subject:

OK well i understand that both fans are working but what I'm saying is that the normal cooling fan that would be working alone when the ac is off might be coming on too late......

G-DUB · Posted: Tue Nov 10, 2009 9:49 am Post subject:

oh ok...well i don`t know if there is anything that controls when the fan comes on

fordfanatic · Posted: Tue Nov 10, 2009 10:41 am Post subject:

ok..... well like my cars or older cars with out a computer we carry a fan-switch and a temp sending unit...... on a newer car i'm not sure if the temp sending unit sends the info to the comp then the comp switches the fan according to the temp......

G-DUB · Posted: Tue Nov 10, 2009 10:45 am Post subject:

well the sender unit works with the gauge in the instrument panel and the coolant temperature unit sends a feed to the ecu

G-DUB · Posted: Tue Nov 10, 2009 2:40 pm Post subject:

Ok I now took out the coolant temp sensor, cleaned it and put it back up and the temperature reading good now...the gauge is just under half and it not moving.

fordfanatic · Posted: Tue Nov 10, 2009 2:42 pm Post subject:

try it under some stress some hard driving..... if its possible try to note what temp the fan will come on........

G-DUB · Posted: Tue Nov 10, 2009 6:59 pm Post subject:

well i drove the car for abt a half hour...hard at times and with and without the ac...temp remained the same, just under the half way mark. Problem solved Very Happy

Thanks to all those tuners who gave me advice.

fordfanatic · Posted: Tue Nov 10, 2009 7:00 pm Post subject:

kool kool

Chipz · Posted: Tue Nov 10, 2009 7:14 pm Post subject:

This happened to me b4, thermostat was stuck