Chevrolet - Montecarlo :: 2002 - Temp Gauge Bouncing From High In The Red To Low
Feb 8, 2014
I have a 2002 Monte Carlo what recently had a new radiator, thermostat, intake manifold gaskets replaced. I was spewing coolant everywhere. Since the repairs with all new OEM parts, I still get the 'Hot Coolant Temp" warning on my dash. The temp gauge is pinned at 260 but minutes later drastically drop to under half way after which it seems to balance out at slightly under half way.
I also see the 'Low Coolant" as well even though I am full. All of this occurring while driving. I checked the oil and underneath the oil cap. No frothy or milkiness. Exhaust seems ok, no white smoke. The heat inside my car when i run it seems to go from warm to cold and back again. I'm praying it's not a cracked heard or blown head gaskets.
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Coolant temperature gauge bounce up and down.
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Here's the deal with this car i just did head gasket, valve job, all new intake gaskets and spark plugs. Car idles fine and mid throttles fine but with high throttle it wont shift and flashes the random misfire light p0300 it seems to run out of power. I've heard everything from maf sensors to ignition coils and wires. i was just wonder a good place to start and good test to do. I have most testing equipment including scan tool so i can ride with it. o and all cylinders compression tested above 150.....
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What can cause a car to jerk forward while accelerating? Other symptoms include loss of HP and MPG. Recently had spark plugs and wires changed. Regular maintenance. I am about to see my mechanic and ask him to check the fuel pressure.
2002 Chevy Monte Carlo ss 100,000mi
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I own a 2002 Monte Carlo SS 3.8 6cyl. I believe it has a 4T65-E transmission.
On a regular basis if I drive 20 miles out of town, on my way back the transmission starts to shift hard (long shift?). From my research online, the 4T65-e is a faulty transmission to begin with. Is it worth replacing the Shift and Pressure solenoids? If I were to buy a new transmission where should I look? What are some model numbers?
Oil, trans fluid, filters are changed on regular basis.New catalytic converter. No Check Engine Light.
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I have a 2012 Crew cab Silverado 5.3 V8 with the towing package. When I pull my travel trailer (approx. 5000 lbs), the water temp stays 1/2 guage and the tranny temp is 170-190, however, on steep hills the water temp guage goes 2/3 to 3/4 guage for a short time and the tranny temp reaches 200-210 degrees. Is the elevated water and tranny temps okay or should I try to reduce them back to the normal range. What is the max temp I should keep the tranny at?
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02 6.8 4x4 excursion. When I start the truck cold, the trans temp gauge immediately moves to "running" temp. Not really sure how this happens, I'd figure that if the xducer was trash it would ride all the way high or all the way low. What's happening here? I'd sure like a functional gauge...
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We have replaced the sensor twice now and it still pegs on high. Sometimes when we just start up the car, other times after we are driving.
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My 2001 Malibu v-6 temp gauge is not working. I have replaced the temp sending unit and it works for a few weeks unit it goes out. What keeps killing the temp sendor?
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I replaced my battery. Once I connected my new battery, my fuel and temperature gauge started working strangely. They would either be high, then go low, then go back high. My interior lights, clock, and radio stopped working. Could it be a relay? I checked all the fuses with a test light and they all looked good.
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Bad news kids... it's terminal. Took my 95 3/4 ton 4X4 6.5 diesel suburban in complaining of temp gauge going high and dropping, alternator... ball joint fears.... And I just got a call, it's got a cracked head. So this is how it ends. Husband aint never gonna fix it. I knew this day was coming. He said the temp gauge going high then dropping is some sort of coolant preasure build up and release. I seen it every morning for the last year. He said he took her up to 120 kms and it did exactly what I said. And he knows exactly what my problem is. It's true, Toni knows this truck. So any guesses how long I got? What will happen when it goes? When would you park it for good? My last over heat was a couple years ago when a belt blew off, big heat is the only thing that would have cracked a head right? So the crack might be that old. And it's sad news. Driving it since birth, 95.
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I have a 95 s10 4.3L V6 auto with 92k miles.
This all started when one day on my way to work the temp gauge got to 260 then quickly fell. It has not gotten that hot since then.
When I start the truck cold and start driving, the gauge climbs to about 215-230 within 10 minutes of driving. Once the gauge hits what ever is the magic mark for the day it quickly falls (10 seconds or less) to about 170-180. Sometimes it will "cycle" up again to 200 or so then fall back to 170-180. Once it is done moving around it stays low and will not move much as I am driving.
I bought an IR thermometer and measured the temperature at various points in the cooling system. The top of the thermostat housing is about 195 or 200 right after it climbs and drops. If I drive for a while around town then check it, the housing reads hotter, about 220 max.
There does not seem to be enough temperature drop across the radiator, I have measured about 15 degrees difference max between the hoses and on some days only 10 degrees difference.
I have replaced the fan clutch (was bad or going bad), the thermostat, and the radiator cap.
After none of this fixed it, I took it to a mechanic who did a "block test" at my request and said it was fine. He thought what it was doing, climbing and falling was normal.
If I run it without the radiator cap on I do not see much if any flow when I look down into the radiator.
Right now I am thinking of doing the water pump and flushing the radiator this weekend.
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A few days ago, the temp gauge in my 1995 Subaru Legacy went sky high in a matter of 2 minutes. I immediately stopped the car, let it cool down & checked the radiator. The reservoir was empty and radiator took about 1/2 gal of water (I figured water was fine since the weather is 90 degrees here right now). Suspecting a leak, I also added a bottle of that "Bar's Stop Leaks" stuff. I hesitantly started making my way home, about 16 miles away. The car was perfectly fine -- no overheating at all. Next day, I drove the car maybe 10 miles & again no problems. Yesterday, I went to a friend's house -- about 50 miles round trip. I assumed (I know, dangerous) that all was well ... until today. This morning I noticed a small puddle of antifreeze near driver's front tire. The reservoir was down by about 1/2 it's capacity BUT the radiator itself was almost full (if it took 3 oz. that was a lot). Now I figure there's a leak, but if there is then why wouldn't the system drain itself all the way? Is it unusual to have a leak that limits drainage?I am also tempted to add another bottle of stop leak but looking around this ...
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We have a 2005 Chevy Tahoe. Been running great. Has 140,000 miles on it 80% open road. Couple of weeks ago was highway driving and noticed the coolant temp gauge went all the way down to nothing, and then back up to normal (middle of the dial) This happened 5-6 times and each time as the temp rose back to normal, the transmission would lurch.
I took it to a mechanic who could not figure out what was wrong, but acknowledged it was running terribly. He said that was what he would try before going to a dealer. I agreed and the car instantly seemed to be running perfectly. Now a couple of weeks later, the coolant temp gauge is dropping again. It is not going all the way to nothing, and the transmission is not lurching. It goes down from half to a quarter and then back again. So something still seems to be wrong. Otherwise all seems to be well.
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When I'm sitting still in traffic or going up a hill the temp gauge will go up. But it goes up real slow. You can set and watch temp gauge and it will just jump up every minute or so. And it has 2 fans on it but they won't kick on till temp gauge gets up over the half way mark. But when temp goes up i can raise the hood and the motor does not feel hot at all. What could cause this?
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I was recently given my first Volvo. Its an 88 240dl. While driving my temp gauge climbs up to the red and sometimes hovers inside of it. It normally climbs up at stop signs and comes down on straight always then climbs right back up close to red. When the gauge was in the red i stopped the car and popped the hood open to see that the engine was not actually overly hot.
first i replaced coolant. nothing
then i replaced the thermostat. nothing
flushed radiator. nothing
Today i finally had enough and decided to switch out the water pump with a new one hoping that it would solve the problem seeing as it still had the factory one on. It did nothing. the gauge continues to climb up. I did replace one of the two senders in hope that it would fix the gauge reading but nothing.
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On my 97 X SOHC, I have a temp gauge that is rather erratic. It reads high even with the engine off and cold and rises when the engine is running to the point the "Check gauges" light illuminates. Then bounces to normal then back near red line. This cycle continues.
To evaluate this, I bought a scan tool and the ECT reads as expected, around ambient to start, gradual climb till the thermostat opens, then hovers there while the radiator does its thing. Heater works as expected. So I'm fairly confident that my X doesn't have a cooling issue.
What my questions are: Can I disconnect the temp sender so I'm not watching the gauge bounce around and then the Check Gauges light is available for other issues that arise?
Does the check gauge light also send a signal back to the PCM?
Can I do any damage to the truck or will the PCM throttle the power back and flash the Check Engine light if a real cooling issue materializes?
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I have a 2002 F-350 6.8L, 4x4, crew cab, 8' bed, SRW, trailer tow pkg. I purchased it new in the fall of 2001. The truck currently has 54,000 miles on it (only gets used when I need to tow/haul something). It's kept in the garage and is in near showroom condition.
Everything on the vehicle is 100% functional except the transmission temperature gauge. Even when the truck sits for weeks, the needle will move to mid scale as soon as the key is switched on - haven't even started the engine yet! Put the scanner on it - no codes stored.
I'm attempting to trouble-shoot the TFT (transmission fluid temperature) sensor. Found some documentation online on the 4R100 transmission. It shows an electrical connector on the solenoid body with pins for the thermistor (so I can measure its resistance). However, I can't find a connector anywhere on my transmission that even remotely resembles the diagram I found online.
Question 1: When you first get in your vehicle and turn the key, does your tranny temp gauge read "cold" just like the engine temp gauge?
Question2: Does my truck have the 4R100 transmission? How can I verify that?
Question3: Looking for documentation on what connector and which pins are for the thermistor?
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I have a 2006 Jeep Liberty 3.7L that has a temperature gauge on the dash that reads an overheat when driving. The oil looks normal, there is no white smoke, no bubbling from reservoir. I have replaced the following:
Radiator
Thermostat
Water Pump
Coolant Temperature Sensor
Coolant Reservoir Tank
I am not leaking any coolant and the reservoir level has been fine. I have let the vehicle idle for 20+minutes, with no overheat. When I drive it around, the temperature gauge will read an overheat. When I stop the car and pop the hood, the engine is not overheated and both rubber hoses to/from radiator are flowing the coolant. The only thing that will bring the gauge down is turning on the heater full blast. Could this be the gauge itself being bad? Could it be a short in a wire somewhere? I had thought maybe a head gasket, but have no symptoms of a head gasket.
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I have a 2002 Kia Sedona mini van and last night while driving home the light that for the gas gauge and temp gauge went out, the other dash lights are still working. How difficult is it to replace a dash board light and how do you find out how to get to this light bulb?
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I have a 1969 chevy c10 pickup. One of its problems is the temperature gauge was not reading. I grounded the sender wire to the engine block to deterimine if the sender was bad, and ever since the gauge reads hot all the time, even with the ignition off. Could I have fried the gauge?
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