TC nose on sport and 5.0 temp needle high

Topic: TC nose on sport and 5.0 temp needle high (Read 6591 times) previous topic - next topic

TC nose on sport and 5.0 temp needle high

Reply #15 – May 13, 2014, 06:47:39 AM

Have you verified the IVR?

TC nose on sport and 5.0 temp needle high

Reply #16 – May 13, 2014, 09:06:03 AM

Quote from: T-BirdX3;433656

The stock gauges are famous for not being accurate, so until you install an aftermarket gauge to get an accurate reading you may be chasing ghosts.

well,
was in process of attempting that then i dropped the guage, fubar'd the calibration on it.

TC nose on sport and 5.0 temp needle high

Reply #17 – May 13, 2014, 09:15:38 AM

Quote from: MechanicMatt;433660

Guys, these cars we all love are getting old. In turn there gauges are getting old too. Id put a laser thermometer on it and know for sure what the temp is.

Why ditch the electric fans??

I'll go with that, however the guages for Temp i dont know for sure but they are such old tech that tend to trust them. Old tech buttstuffog is typically what you *will* find in most calibration labs to certify and calibrate your tools or measuring devices.

A laser temp reading will not be accurate , i have another temp measuring device that is a k wire which i can snake up into the radiator hose and with a dab of silicone, i can get the tiny little approx 22awg temp probe directly into the water while the engine is running ... going to do that this morning.

I ditched the Efan because #1 its not oem, and we wanted to lighten load on the 3g plus we wanted to go back to the fan we know is spinning regardless of the associated subassembly pieces parts or possible failure.
There was nothing wrong with Privateers design, I wanted to remove this item from my son's probable faults when he is broke down somewhere and needed to troubleshoot.

TC nose on sport and 5.0 temp needle high

Reply #18 – May 13, 2014, 09:18:15 AM

Quote from: TheFoeYouKnow;433683

Mach 1 Chin spoiler. Stylish AND functional. I say get more air across that rad, Either by scooping more up from underneath, or by swapping in an electric fan (I'm still running that 2-speed I built and it's awesome). Preferably both. Another thought: if you've got a TC hood, I've always wanted to get one and relocate my trans cooler to the hood port with it's own dedicated fan.

good info, thanks , serously considering options like this because at the end of the day, what we need to happen is the temp drop while moving about slowly in town, read further for update from yesterday........ pls dont bash me but this is yet another example of the high level of technical people we tend to keep around here.................... you'll see.

good point on the IVR,, reason i say this is mason says he is noticing that his system sentry is triggering a "low fuel" warning but the guage is higher than what he thinks should be low fuel.
this goes back to my earlier comment on the efan,, when we first got the car, similar issues but i ended up finding the little tiny "gray" resistance wire" that is parallel with the large GRAY/yellow conductor on the ignition switch had been chared and discolored. it finished breaking off as i messed with it.
i recut the least amount off and reconnected, iirc i soldered it one but will revisit that.
the resistance wire may be the issue.

TC nose on sport and 5.0 temp needle high

Reply #19 – May 13, 2014, 09:32:36 AM

update~
my son called me around last fall telling me his temp guage is reading kinda high now that he is constantly driving at slower speeds but at that time he had the standard sport nose and grille,, he said the temp needle was "sometimes" hitting 75%.
We jacked with it a little and i couldnt duplicate the issue.
He went back to charlottsville Va and eventually swapped out the temp sensor which to his opinion resulted in a "stay tuned"

fast forward to this past mid april and he called to tell me his temp guage is going up as the days get hotter.
he took it to a place that does coolant system flushes, and get this.............................................................
He was told by the tech that "you sure got a good water pump, see that water running", the radiator cap was off at this time.

I asked my son was the motor hot and he said not really, the place i took it to is close to my appartment.
I told him that doesnt sound right, sounds more like the Tstat is stuck.

fast forward to yesterday,,,, yes the water is flowing through the radiator with a bone cold motor so i showed him my 20th,, and what the water is suppose to do.
I told him the water should basically sit still and to a point eventually it will start to gurgle out over the top of the fill kneck till at some point the tstat will open and then it will start to flow,, but that takes a while.

Tstat was stuck open.

replaced the *Mother F*&*$& with a 195

I drove the car around like he does,he normally uses "D" for driving around town.
simulated town driving , simulated high speeds in "D" and in "OD"

The needle is "wanting" to maintain a position just on the edge of the letter "N" on norm for the buttstuffog cluster.
I call this approx 80% of scale.... i dont like it.
I am going out now to do a direct in the water reading and will update.

so,, the tech was wrong but i dont want to speak negatively like that to someone, i just feel like it was very misleading or he was missing some basic fundumentals of water circulation.

we have *not* tested the temps with the hvac on,, like tom mentions,,, that would probably have a larger effect on the max reading i was able to badger out of the car.

will have to take a look at the little gray wire on the ign sw which serves as the IVR resistance wire since its commone to the results displayed on both the temp and fuel readings displayed.

TC nose on sport and 5.0 temp needle high

Reply #20 – May 13, 2014, 12:32:57 PM

today .......
we ran the car hard then quickly connected our temp probe up to our meter.
the needle was just barely touching "N" on norm for the buttstuffog cluster.

thoughts? before we inspect the IVR 12v to 5v resistance wire on the ign switch?

during warm up for about 10min, the needle was just below "N" and the temp value on our meter was in a range of 194 to 198deg.

all this above mentioned testing done with no hvac running.

TC nose on sport and 5.0 temp needle high

Reply #21 – May 13, 2014, 12:59:15 PM

Seems about right to me. 200-220 is about optimal in my opinion.

TC nose on sport and 5.0 temp needle high

Reply #22 – May 13, 2014, 08:36:34 PM

Thermostat controls tempeture as long as there is enough flow.

my guess is your irv is screwey. unless you've blown your cap, your probably not overheating.

TC nose on sport and 5.0 temp needle high

Reply #23 – May 13, 2014, 10:00:34 PM

well, we did add this to the bumper cover.
very nice item, intended for a chevy colorodo but easilywraps around after you trim.

TC nose on sport and 5.0 temp needle high

Reply #24 – May 13, 2014, 10:02:46 PM

Again the bi metal gauges in these vehicles have been flaky since day one, a couple friends were complaining about operation of gauges in their '88 Sports when new...

Been discussed at length on NATO, some have subbed a LM7805 regulator for the bi-metal inside the IVR but resulted in constant low readings... Possibly a 7806 would give a more accurate reading, dunno if anyone tried the higher voltage regulator...

TC nose on sport and 5.0 temp needle high

Reply #25 – May 13, 2014, 10:21:14 PM

here are some pics of the chin spoiler with info.
all of which changed *****NOTHING********
inspected the ivr 12v resistance wire and its solder connection , verified it looks ok.
it looks like i need to verify the ivr output is 5v or not.... like tom said above.

TC nose on sport and 5.0 temp needle high

Reply #26 – May 13, 2014, 11:08:55 PM

Hmmm, you don't like the laser thermometer? I have a fluke 87, and all the attachments, even though the fluke may be more accurate to hook up...... In my business time is money (flat rate tech) and if the laser is off 2*-3* it generally won't mislead me too much. 206 isn't too hot, Id check that resistor with your meter. Good Luck.

TC nose on sport and 5.0 temp needle high

Reply #27 – May 14, 2014, 07:54:27 AM

no~ i was thinking for this application i wasnt real confident that my laser thermometer would get the correct value... reading surface temps and all.
i do like the laser testing.

TC nose on sport and 5.0 temp needle high

Reply #28 – May 14, 2014, 10:21:40 AM

Hey Tom,
i know you know this but for the benefit of othere.........
the ign switch gray / yellow wire has the parallel solid gray ~solid conductor 8.5ohm ~ resistance wire home run up to the ivr input.

if this is defective, have you considered or would object to the idea of doing a 22awg sol conductor with a series 8.5ohm 20w or 50w resistor i can get from Ohmite?

technically , i have modifed the ammeter to be a volt meter and have an existing 12v isolated source in our buttstuffog cluster now.

thoughts on this? and your suggested wattage..
or the other option you mentioned?
or should i just go the way of external guages.... which mason would rather make his oem one work again.

TC nose on sport and 5.0 temp needle high

Reply #29 – May 14, 2014, 02:27:41 PM

Doesn't look to be overheating to me. It's probably a gauge problem. If the hoses are firm after it warms up and the overflow isn't full and puking coolant the car is more than likely not overheating.