Need help with this one.....89A4
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by cuisinartvette
CFI, I'm trying to get straightened out on what does what, thus my ?? marks at the end of my previous post.
So if the fanswitch on the drivers side head is kicking the aux fan on at 162, when/what governs the main fan and when is that supposed to come on?
So if the fanswitch on the drivers side head is kicking the aux fan on at 162, when/what governs the main fan and when is that supposed to come on?
Originally Posted by CFI-EFI
Quote:
Originally Posted by cuisinartvette
1.) 89 Drivers side-Fan switch for main fan
2.) Pass side-To gauge?
3.) Manifold-To ECM? ECM kicks aux fan on at 228
4.) Someone correct me if I'm wrong..
Man that car is ALL screwed up.
1.) Fan switch for the AXILLARY fan.
2.) Yes.
3.) Yes, BUT, the ECM is supposed to control the MAIN fan.
4.) Done.
Originally Posted by cuisinartvette
1.) 89 Drivers side-Fan switch for main fan
2.) Pass side-To gauge?
3.) Manifold-To ECM? ECM kicks aux fan on at 228
4.) Someone correct me if I'm wrong..
Man that car is ALL screwed up.
1.) Fan switch for the AXILLARY fan.
2.) Yes.
3.) Yes, BUT, the ECM is supposed to control the MAIN fan.
4.) Done.
Originally Posted by cuisinartvette
Edit: As far as I can tell, the fans have never been rewired. The fan switch I used was the one sold by Mid America, instructions followed to a T, soldered the joints, all looks good.Its properly done.
RACE ON!!!
Last edited by CFI-EFI; Jan 1, 2006 at 12:42 PM.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
In any case, I have tried to explain how it was supposed to work, and the location of components what the car was built.
..Now I gotta get out there and play with this thing..
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by hippy
The ECM prom governs when the main fan comes on and the ECM gets its signal from a switch located either in the passenger head or front of manifold.
Originally Posted by hippy
Since you changed out your passenger side switch and the fan no longer comes on when the motor is cold I SUSPECT that switch was bad and sent a false high heat signal to the ecm thus turning the main fan on early.
Originally Posted by hippy
Like I said just pull the wire to the passenger side sensor and see if your dash gauge works or not. Then you know what controls what.
RACE ON!!!
Le Mans Master
Joined: May 2000
Posts: 7,033
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Originally Posted by CFI-EFI
Not either. The front of the intake manifold. That has been clearly stated.
The passenger side head sender, is ONLY or the dash gauge. It has NOTHING to do with either fan.
It has been clearly stated, "what controls what".
RACE ON!!!
The passenger side head sender, is ONLY or the dash gauge. It has NOTHING to do with either fan.
It has been clearly stated, "what controls what".
RACE ON!!!
As far as what has "clearly" been stated. I've read typos in books b4, so nothing to me is clear unless I am actually doing the work and can see it with my own 3 little eyeballs.
Gotta do a quickie edit.
His main fan was coming on early, he replaced his passenger side switch, fan isn't coming on early now. Why do you suppose that is if this has been explained clearly as to what switch does what?
Last edited by hippy; Jan 1, 2006 at 01:10 PM.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Quick update:
1)Disconnected the connector to the switch on pass side head, no coolant reading, so I guess that's where the gauge gets the reading from
2) Tested O2, works fine.
3)Car runs strong, still has a slight stumble at idle. Sprayed water around runners/plenum/air coupler, nothing,.I'll spend more time around the FI and make sure orings arent sucking air.
4)I'll stick it back on the dyno next week to see where the A/F is at.
Thanks for the help guys, keep you posted.
I'm doing something wrong checking the TPS voltage, cant get a reading. Have the multimeter at 20 (V), black prong in second wire, red in top wire, no reading???
Timing at 6 deg.
Edit: Also stuck that thermomaster chip I've had laying around so main fan comes on earlier now. Good enough.
1)Disconnected the connector to the switch on pass side head, no coolant reading, so I guess that's where the gauge gets the reading from
2) Tested O2, works fine.
3)Car runs strong, still has a slight stumble at idle. Sprayed water around runners/plenum/air coupler, nothing,.I'll spend more time around the FI and make sure orings arent sucking air.
4)I'll stick it back on the dyno next week to see where the A/F is at.
Thanks for the help guys, keep you posted.
I'm doing something wrong checking the TPS voltage, cant get a reading. Have the multimeter at 20 (V), black prong in second wire, red in top wire, no reading???
Timing at 6 deg.
Edit: Also stuck that thermomaster chip I've had laying around so main fan comes on earlier now. Good enough.
Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
Originally Posted by cuisinartvette
Quick update:
1)Disconnected the connector to the switch on pass side head, no coolant reading, so I guess that's where the gauge gets the reading from
2) Tested O2, works fine.
3)Car runs strong, still has a slight stumble at idle. Sprayed water around runners/plenum/air coupler, nothing,.I'll spend more time around the FI and make sure orings arent sucking air.
4)I'll stick it back on the dyno next week to see where the A/F is at.
Thanks for the help guys, keep you posted.
I'm doing something wrong checking the TPS voltage, cant get a reading. Have the multimeter at 20 (V), black prong in second wire, red in top wire, no reading???
Timing at 6 deg.
Edit: Also stuck that thermomaster chip I've had laying around so main fan comes on earlier now. Good enough.
1)Disconnected the connector to the switch on pass side head, no coolant reading, so I guess that's where the gauge gets the reading from
2) Tested O2, works fine.
3)Car runs strong, still has a slight stumble at idle. Sprayed water around runners/plenum/air coupler, nothing,.I'll spend more time around the FI and make sure orings arent sucking air.
4)I'll stick it back on the dyno next week to see where the A/F is at.
Thanks for the help guys, keep you posted.
I'm doing something wrong checking the TPS voltage, cant get a reading. Have the multimeter at 20 (V), black prong in second wire, red in top wire, no reading???
Timing at 6 deg.
Edit: Also stuck that thermomaster chip I've had laying around so main fan comes on earlier now. Good enough.
Now I'm curious why that main fan turned off replacing the passenger head switch.
Do you have the TPS harness tester. You unplug your pigtail to your tps and plug this unit in between. There are 2 alligator clips on wires that you hook your multimeter into? It makes checking TPS voltage a lot easier as getting your probes jammed in the pigtail is kinda a bitch.
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Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by hippy
Yes, I know it doesn't control the fan directly but indirectly. It sends a signal to the ecm. I get it.
Originally Posted by hippy
His main fan was coming on early, he replaced his passenger side switch, fan isn't coming on early now. Why do you suppose that is if this has been explained clearly as to what switch does what?
RACE ON!!!
Le Mans Master
Joined: May 2000
Posts: 7,033
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Originally Posted by CFI-EFI
Apparently you DON'T get it. The sender in the right side head is for the dash gauge only. The ECM receives NOTHING from that sender, directly or indirectly. The main fan is controlled by the ECM and the temp setting burned into the prom. The ECM gets it's engine coolant temperature information ONLY from the ECT sensor in the front of the intake manifold, not partially from the gauge sender, the fan switch, or off of the Internet. All of this is stated above.
*I* have explained clearly where each device is and it's function. Goodness knows if he wrote, or you read, correctly about the fan coming on early when he replace the gauge sender. For it's effect on the fan, he may as well have added a quart of oil.
RACE ON!!!
*I* have explained clearly where each device is and it's function. Goodness knows if he wrote, or you read, correctly about the fan coming on early when he replace the gauge sender. For it's effect on the fan, he may as well have added a quart of oil.
RACE ON!!!
Just because you say it's so means it's so? All I told him to do was pull the wire to test if that's the case. I read what you said and since you aren't infallible I told him a simple test to prove what you said to be right. I stated I didn't remember for sure which sensor did what. Is that a problem? Did you read any other misinformation in this thread? Are you infallible?
Quote the rest of what I wrote before you spout off like you are a supreme deity.
Last edited by hippy; Jan 1, 2006 at 05:22 PM.
Race Director
Joined: Sep 2000
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From: The Top of Utah
Originally Posted by hippy
Did you read any other misinformation in this thread? Are you infallible?
Originally Posted by hippy
Quote the rest of what I wrote before you spout off like you are a supreme deity.
Originally Posted by hippy
Yes, I know it doesn't control the fan directly but indirectly. It sends a signal to the ecm. I get it.
As far as what has "clearly" been stated. I've read typos in books b4, so nothing to me is clear unless I am actually doing the work and can see it with my own 3 little eyeballs.
Gotta do a quickie edit.
His main fan was coming on early, he replaced his passenger side switch, fan isn't coming on early now. Why do you suppose that is if this has been explained clearly as to what switch does what?
As far as what has "clearly" been stated. I've read typos in books b4, so nothing to me is clear unless I am actually doing the work and can see it with my own 3 little eyeballs.
Gotta do a quickie edit.
His main fan was coming on early, he replaced his passenger side switch, fan isn't coming on early now. Why do you suppose that is if this has been explained clearly as to what switch does what?
RACE ON!!!
Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
Originally Posted by CFI-EFI
I have read MUCH misinformation in this thread. Aren't you paying attention? I have done my best to straighten it out. Your contradicting me, with no back up, doesn't help. I am NOT infallible. If I have misstated something, point out what, and where. I will either apologize or ask you to back up your accusation.
OK. Here is the whole post:Quoting the whole post doesn't make the first paragraph any more correct. You say, "I get it.". But what you post, proves you DON'T get it. Instead, you contract what I say, making it look like you know better or different than I have stated. Say that I am wrong, and then back it up. Some people look to these threads to learn, if you can't contribute in a positive manner, then...
RACE ON!!!
OK. Here is the whole post:Quoting the whole post doesn't make the first paragraph any more correct. You say, "I get it.". But what you post, proves you DON'T get it. Instead, you contract what I say, making it look like you know better or different than I have stated. Say that I am wrong, and then back it up. Some people look to these threads to learn, if you can't contribute in a positive manner, then...
RACE ON!!!
Originally Posted by hippy
I am not totally sure what switch (front of manifold or passenger head) controls the dash gauge and which sends its signal to the ecm. What I would do if I were you just to find out is disconnect the switch in the passenger head and see if your dash gauge works.
Originally Posted by hippy
The ECM prom governs when the main fan comes on and the ECM gets its signal from a switch located either in the passenger head or front of manifold. Since you changed out your passenger side switch and the fan no longer comes on when the motor is cold I SUSPECT that switch was bad and sent a false high heat signal to the ecm thus turning the main fan on early.
Originally Posted by hippy
Yes, I know it doesn't control the fan directly but indirectly. It sends a signal to the ecm. I get it.
I wasn't trying to hurt your feelings by telling him to pull a wire to verify that the particular sensor in his passenger head was indeed for the temp gauge. I said I don't remember which sensor does what so a test for me to do to verify is pulling the wire. If you notice we posted at the same time this morning when I first said I DON'T REMEMBER. If I don't remember I won't necessarily blindly follow someones facts.
I wasn't trying to one up you, I was giving him something to try to verify what is being told to him to be correct. Is that a problem or should no one on this forum ever question what you say?
You say people come here to learn, guess what? They learned that they can pull the wire on the passenger side temp sensor and see that their temp gauge on their dash no longer works.
Now since he has stated that he pulled the wire and his gauge died I feel VERY comfortable saying that you are indeed correct. THE PASSENGER SENSOR WORKS THE GAUGE AND THE MANIFOLD SENSOR FEEDS THE ECM.
YOU WERE RIGHT AND I STILL DIDN'T REMEMBER THIS MORNING WHAT DID WHAT.
Can we be friends again, I miss ya buddy.
Last edited by hippy; Jan 1, 2006 at 06:41 PM.
Drifting
Joined: Mar 2005
Posts: 1,923
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From: GA
Originally Posted by cuisinartvette
I'm doing something wrong checking the TPS voltage, cant get a reading. Have the multimeter at 20 (V), black prong in second wire, red in top wire, no reading???
Drifting
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Originally Posted by CFI-EFI
WRONG!
I have NO clue as to why Morley would cite his Camaro or Firebird as examples for Corvette wiring.
RACE ON!!!
I have NO clue as to why Morley would cite his Camaro or Firebird as examples for Corvette wiring.
RACE ON!!!
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
There is a lot of room for rebuttal, but I think most of the main points have been made on all sides, and more importantly, some of cuisinartvette's questions have been answered. I believe there is now a consensus of the locations and functions of the various sensors, which is why *I* joined the discussion, on the first place. There was too much incorrect sensor info being bandied about. 
RACE ON!!!
RACE ON!!!
Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
Originally Posted by CFI-EFI
There is a lot of room for rebuttal, but I think most of the main points have been made on all sides, and more importantly, some of cuisinartvette's questions have been answered. I believe there is now a consensus of the locations and functions of the various sensors, which is why *I* joined the discussion, on the first place. There was too much incorrect sensor info being bandied about.
RACE ON!!!
RACE ON!!!
Quit looking Cuisin.