Not sure if its my gauge or the thermostat..... when i'm driving the needle hardley moves too 130...when i'm still and idling for awhile the temp creaps alittle past 130...what do you guys think?....thermo?
MK III ,1.5 Kenne Bell Supercharged 302, 6 tiny PSI of boost but boy doesn't she go!- SOLD....Now have a 03 Terminator Mustang Cobra
Stock Radiator or BMFAM unit? If you've got the stock unit I can't imagine that even without a thermostat that you'd run @ 130. With a BMFAM unnit and cold temp's outside it's possible if your thermostat's stuck opend.
Get an infrared heat sensor and check it. Armed with that infor it then its a process of elimination.
\"Buffy the Hot Rod Slayer\" we call her. Remember guys: \"That which does not kill you makes you stronger.\"
Take the sender out and put it in a pot of just-boiled water. It should shoot right up to 200 or more, depending on how fast you are getting the water from your stove to the garage.
That's the easy part. Now you need to know what voltage output to expect from the sender at both ends of the scale. Once you have that you can use a voltmeter to determine if it is the gauge or the sender. Sorry I can't provide this info for you. Maybe someone else can chime in here.
Mk.II 5.0, RPM heads, Explorer intake, 65TB 75MAF-24#, PS, PB, 3.73 posi, 17\" Cobra R\'s, dual roll bars, street performer seats, classic gauges, VPM sway bars, 3-link.
It's not voltage, it's resistance. The system is always at 12 volts.
The sender is at high resistance when the temp is low. Resistance drops as the temp goes up.
There's a Ford Rotunda tool to check it, but, the senders are cheaper than the tool I'm sure.
Change the sender and see if that makes a difference. If it doesn't, you have a spare.
Are any of the other gauges acting like they might not be right?
Make sure ALL your grounds are attached and are GOOD. A bad ground will add it's own resistance to the system and that can cause the gauge to get a false signal.
Mick, I see where you're running the stock gauge. Are you running a stock sender? Are you sure the gauge and the sender are compatible with each other? Are you sure you're not using what had previously been the sensor for the computer?
Stock Mustangs have a sender for the gauge (up front near the distributor) AND a sensor for the computer (in one of the heater hard lines). They're not the same part.
3733k Stock 5.0, 3:55 gears, 15" Halibrands, '91 donor, Tremec 3550. "Arrest Me" Yellow / Black Stripes.
My car: a lightweight, precision-guided, sledgehammer.
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