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another gauge ? by rcm
Started on: 10-13-2013 05:46 PM
Replies: 11 (260 views)
Last post by: rcm on 10-22-2013 04:52 PM
rcm
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Report this Post10-13-2013 05:46 PM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
ok I have a 86 se 2.8 with temp gauge that goes to 120 degrees.Replaced sender no change.Ground one wire the
bulb comes on,ground the other wire gauge pegs 260.Fan cycles on and off.any ideas.
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Gall757
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Report this Post10-14-2013 09:58 AM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
Welcome to the Forum!

The fan works on a different sender. When you test to ground are you using the sensor housing or the engine block? Did you use any tape when you installed the new sender? The threads must be bare and clean.
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rcm
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Report this Post10-14-2013 01:12 PM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yeah the fan switch is up front but just saying it is cycling in relation to the gauge only reading 120 .
I did not use Teflon but did use rtv on the threads.I didn't think that was the problem since it does
come up to 120 and quit.
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rcm
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Report this Post10-14-2013 04:26 PM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
ok went back out to make sure.I grouned one wire to the sender the light came on
ground the other wire to sender and gauge swings to 260.
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MadMark
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Report this Post10-14-2013 07:31 PM Click Here to See the Profile for MadMarkClick Here to Email MadMarkSend a Private Message to MadMarkEdit/Delete MessageReply w/QuoteDirect Link to This Post
You probably are experiencing a problem that occurs on all Fiero's. The wiring to the temp gauge is wired in such a way that when you turn the car on it tests the idiot lights. When it does that it pegs the temp gauge and it eventually spins the dial out of calibration. I believe there are some on here who can point you to what you have to do to fix the problem. I had this problem and when I had my engine swapped one of the mechanics fixed my temp gauge.

So I would do a search of the forum for this problem or maybe visit the Ogre's Cave where he might explain it better and have the fix too.
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rcm
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Report this Post10-14-2013 08:21 PM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
Well that's just it my gauge doesn't do that when key is on.And it does go all way to 260 when grounded.
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rcm
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Report this Post10-19-2013 11:07 AM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
bump
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Gall757
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Report this Post10-20-2013 08:44 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
At 100F your sensor for the gauge should have a resistance of 1400 ohms, and at 260 it should be 55 ohms (or lower). It appears that your sensor has failed.
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rcm
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Report this Post10-20-2013 09:53 PM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
Sensor is new and the old one did the same thing.
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rcm
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Report this Post10-21-2013 04:52 PM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
Well after replacing alt,cts I think I found out why the gauge doesn't get over 130.I pulled the thermostat and the
po had a 160 degree in there.So I need to figure out where to go.The 195 or the 180?

[This message has been edited by rcm (edited 10-21-2013).]

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Gall757
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Report this Post10-21-2013 05:01 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
Fieros have a lot of coolant....I always figured that the engineers knew what they were doing when they put the 195* in.
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rcm
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Report this Post10-22-2013 04:52 PM Click Here to See the Profile for rcmClick Here to Email rcmSend a Private Message to rcmEdit/Delete MessageReply w/QuoteDirect Link to This Post
I put in a 195 thermostat and now the temp gauge is coming up to 175.Because the fan is coming on early and suspect the
fan switch must be 160 to 180.Now I need to replace that one with a 210-200.
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