Re read the post that precedes the quoted post. Your car isn't "reversed" it's an '85 as you said, not an '86, that I first posted for.

My car is different. I don't have an aux fan. I believe the aux fan is forward of the radiator. You would hear, but not see it running, as you grounded the wire on the pass. side of the car. Your last posts indicate that the wiring to the main fan has been changed. Possibly the fan is wired to both the ECM and the aux fan switch and it has been working all along. You should have two fan relays. It's time to undo the genius plan you've inherited and get it straightened out.

RACE ON!!!

 

Now I have not read all of the detail that has been included thus far, but the '86-'89 would have the round coolant sensor on the drivers side in the front hole, and the other coolant sensor with the simple flat tab on the back on the passengers side. I believe that someone had the heads off the motor prior and re-assembled the heads on the opposite banks, and then tried to "jerry-rig" the connections. Just a thought.

Now before going nuts in correcting this error, the sensors can simply be swapped back to the correct sides of the engine. THERE IS NO NEED TO SWAP THE HEADS!

Best of luck,
Aaron

 

You should have.That is flat wrong, which you would be aware of, if you'd read the previous posts. You also missed the part about the ZZ4 engine.

RACE ON!!!

 

Droshiki,
I meant to write-it as '86-89. It sounds as if you are on the right path to solving your problems.

CFI-EFI,
Your tact, or lack therof, leaves something to be desired! You need to really get a handle as to what is wrong in your life that causes you to conduct yourself in the manner in which you do.

Cheers!

 

WHAT?

It's my fault you did "not read all of the detail that has been included thus far"? I only said , "You should have." And it's my fault that either through not reading or ignorance of the topic, that you contradicted correct information given? My response to that, was, "That is flat wrong", which is true. How would YOU prefer that I sugar coat pointing out gross, incorrect, denial, of correct posts and blatant misstatements?

I forget. Who is it that rushes in (without reading?) where angels fear to tread? You might want to take a look at, "your life". Why so sensitive?

RACE ON!!!

 

WHAT?

It's my fault you did "not read all of the detail that has been included thus far"? I only said , "You should have." And it's my fault that either through not reading or ignorance of the topic, that you contradicted correct information? My response to that, was, "That is flat wrong", which is true, of course. How would YOU prefer that I sugar coat pointing out gross, incorrect, denial, of correct posts and blatant misstatements?

I forget. Who is it that rushes in (without reading?) where angels fear to tread? You might want to take a look at, "your life". Why so sensitive? Especially when you are so wrong?

RACE ON!!!

 

Geez guys.....easy there...(never knew this was going to get this complicated)

Happy new Year!

OK, here is what I found out.

As was stated earlier, either the ECM or the temperature switch in the head can turn the fan on. My book (Haynes) says that either one will turn it on at 239 degrees, the head temp switch being a backup to the ECM.

My ECM has been turning the fan on at 180 degrees. I am curently running an aftermarket chip specifically burned for the ZZ4. It wasnt overheating with stock chip either, but thats moot at this point, I am not going to put it back in just to check. In any event thats why I havent been mising the function of the head temp switch.

Aux fans- again according to Haynes- some had them, some didnt. If you did, it's smaller, located in the upper left corner of the front of the radiator, and has a relay (as opposed to the main fan relay) mounted on the upper left corner of the radiator shroud.

I have no aux fan relay, and I have a very large fan crammed up in front of the radiator. These facts, plus the kluge wiring to it, make me believe that is indeed an add-on.

I plugged it in (remember it was unplugged) and besides the fact that its blades were hitting its frame from being crammed in there.....the car ran 10 degrees hotter with it.

So... I am going to take the aux fan out of there- repair the wiring - and replace the head temp switch. I am pretty sure you can get them in a variety of temps...so I will shoot for about 200 or so.

Thanks to everyone for getting me pointed in the right direction and getting my thinking cap put on!!