Heating issues HELP

[2GTalonTSI]

OK DSM Gurus... ;)

My 95 talon gets a little warm since it has been hot. Close to the red but not quite. The hills I travel on to and from work are not that big. I have not been running the AC for fear of overheating the car.

The cars fan is wired to the ignition and not the temp sensor. (aparently the prev owner could not get it to work right) It looks to me as if only the fan on the passenger side is running, the driver side fan is doing nothing, I have checked while the car was near the red mark on the gage. (thinking maybe both fans would be working)

I wanted to tear into it a little this weekend as I have to make a trip to ellensburg sunday and it is supposed to be in the mid 90's! So any pointers would be greatly appreciated.

Mark.

Thanks in advance!

[96gsx]

so, with the fans wired dirrectly to the ignition are both fans running all the time, or only just one.

[2GTalonTSI]

Just the one on the passenger side, been doing some reading and looks as if the one on the driverside is for overload from the AC etc. Thanks for response.

[96gsx]

The ECU kicks the fan on once it hits 206deg IIRC. With the fans wired dirrectly to the ignition you're eliminating that option. Rewire your fans to the coolant sensor or cross wire the fans so they both come on..

[2GTalonTSI]

OK cool I am looking for a diagram for the wiring. Thanks again. ;)

[Kolat]

only one fan is triggered by the temp, the other one is the AC fan and just kicks on when you have the AC on :-p

T

[talntid]

Bring 'er over, and we'll see what's up :)

.. oh, and buy DSMlink :)

[2GTalonTSI]

Bring 'er over, and we'll see what's up :)

.. oh, and buy DSMlink :)


Hmmm you going to be around sat? I will get a DSM link as soon as I get the $$$$$$ ;)

[2GTalonTSI]

only one fan is triggered by the temp, the other one is the AC fan and just kicks on when you have the AC on :-p

T


Yeah that is my understanding. THX for the input. :D

[talntid]

I should be at my place on SAT... BTW, u got a thermostat housing for a 1g? the part that bolts to the head...

[96gsx]

I always thought the T-stat contolled both fans, and the ECU switches the AC fan on at 210deg..

[96gsx]

I'm wrong..**Here's a little more info for you.**

It just takes so much time to go digging into the code to make sure the values are correct that I, for one, am reluctant to do it. For example, it has taken me 40 minutes to confirm all the following values...and I've got 82 other "updated threads" to wade through this morning. Granted, some of that time was spent coding up a little conversion tool so I didn't have to keep converting raw to "displayable" values from the code. But you get the idea.

The ECU will not update long term fuel trim values (called "learn mode" in the first post of this thread) under at least the following conditions:

2G: coolant < 179F, intake >= 133F, baro < 22.9 inHg, baro > 31.6 inHg
1G: coolant < 190F, intake >= 123F, baro < 22.9 inHg, baro > 31.6 inHg

The ECU will force open loop mode under a zillion different conditions, including the following.

2G: coolant < 51F, coolant > 228F
1G: coolant < 87F

Dave has already covered fan operation on 2Gs. I'll quote here again for completeness. At speeds less than about 45 mph with the A/C off, the radiator fan will be switched on low at 210 and off at 203. Under all conditions the radiator and A/C fans will be switched on high together at 224 and off at 217.

Fan operation on 1Gs, of course, is not ECU controlled.

The 2G code includes a manual (as opposed to table based) reduction in ignition advance that does not appear to be present in 1G code. This pulls a total of one degree of timing at 206F or a total of two degrees at 224F (they are not cummulative).

Intake temperature will also cause a reduction in ignition advance. The tables are laid out like so, with interpolation occuring between the points.

2G intake air temp ignition advance adjustment:

185F = -3°
132F = -2°
100F = -1°
73F = 0
48F = 0
20F = -1°
-23F = -2°

1G intake air temp ignition advance adjustment:

185F = -3°
132F = -1°
100F = 0
73F = 0
48F = 0
20F = -1°
-23F = -2°

Whew. OK, hopefully that's enough for now.

Thomas Dorris

Fan controle information
Good point. Currently there is only one dataloggable item related to fan control. That item, as you noticed, is RadiatorFan. That will switch from 0 to 1 when the ECU is commanding any fan on (low or high either one). The missing item would be called something like "CondenserFanHi" which would basically indicate activation of all 3 ECU-control fan relays (because the ECU does not activate the two high relays without also activating the radiator low relay).


Quote:
Originally Posted by questhe
In the manual, it looks like there are 3 relays: low for both, and then each has a high relay.

Let's start from the top. The manual shows 4 relays total (5 if you count the Automatic Trans override thing).
RADIATOR FAN RELAY (LO1)
RADIATOR FAN RELAY (HI)
CONDENSOR FAN RELAY (HI)
CONDENSOR FAN RELAY (LO)
The condensor fan low relay (4) is activated by the "AUTOMATIC COMPRESSOR ECM", not our beloved engine control module.

The ECU only controls the radiator low (1), the radiator hi (2) and condensor hi (3) from above. Activation of (1) is what you see when you datalog RadiatorFan in DSMLink. Activation of (2) and (3) is what you would see if we added the CondenserFanHi item.

The problem, to be honest, is that we've been so focused on V3 the last several months, that I'm not sure I'm prepared to build a new release of V2 at the moment. If you really need this, I'll certainly consider it. But for now, I'd rather leave it alone.

Thomas Dorris

correctly wiring manual control switch
http://vfaq.com/mods/wayback/2gcoolingfan.html

[2GTalonTSI]

OK I got the secondary fan to work, not sure what I did or not but it is working now. played with the fuses and that is about it. Hmmm.... oh the life of a DSM owner. ;)

[2GTalonTSI]

BTW, u got a thermostat housing for a 1g? the part that bolts to the head...


Sorry I do not have that part sir.

[droppinbottom]

Man i know you are just trying to help but dont quote from the link forums. that site is member only.

does your ac work? if not just check the other fan by turning on the ac. that is how i have my slimline setup since i no longer have the ac in mine.

[2GTalonTSI]

Got everything working thanks tho... :)