Ford Ranger / B-Series :: 1997 - Water Temp Gauge Does Not Work
Feb 27, 2012
Water temperature gauge doesn't work. Assumed the problem was the sensor so bought a new one. Installed it, still nothing registering on the gauge after I know the water is heated up (drove it for 45 minutes, heater blowing hot).
So crossed the ground on the sensor and the gauge shot to the top so gauge is working.
Pulled wiring diagram and that sensor is SUPPOSED to register 79ohms for cold and 8 ohms for hot.. So bought a 10ohm resistor from radio shack and attached the water temp lead to it and the gauge read correctly about 1/8 inch from the H mark on gauge. This confirmed for me that gauge is not at fault.
Next I attached the ohmmeter to the sensor itself, boiled some water, placed the sensor tip into it and it read 86 ohms, in freshly boiled water! So at boiling the sensor isn't anywhere near to tripping the gauge to even start reading cold! So I tested the old sensor that I was replacing and in boiling water it shows 94 ohms?
What am I doing wrong, is there an assumption I am making here in error? I want to conclude the new sensor is bad, but the old sensor reads nearly the same reading under same conditions.So yes maybe they are BOTH bad but that seems to be pushing probability.
If it matters this sensor is the type that is inline from radiator to heater core, not the type that is in the engine block, at some point ford changed their sensor setup but didn't change the schematic drawing. Which doesn't matter the only difference is the one in-line has a ground wire to it rather then grounding off the engine block.
Vehicle is a 97 Ford Ranger with the 2.0 liter engine.
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Once the gas nozzle clicked off I gave it one last squirt to top it off and gasoline began flowing out under the car. Not dripping, not trickling, not squirting out back at me. Under the truck. Maybe a pint to quart of gas. After wondering if I was going to blow up that part of the county if I started my truck, I figured God wasn't done with me yet, so I started it and drove until I used up about 3 gallons. My husband thinks it is OK to keep the truck because by overfilling it I triggered a valve that actually supposed to do just what it did….release the extra gas.
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My girlfriend has a 97 Ford ranger that can't make it out of the driveway when it warms up to operating temp. This is what was replaced thus far. Cat, timing belt, plugs and wires, air and fuel filters. It has about 37 psi at the rail, the codes shown were second 02 sensor, and fuel to lean on bank one? I looked thru a few postings but I'm actually at work and can't really spend too much time looking thru much more. The timing was checked about three different times just thinking that was the problem after the new belt was installed. It does idle perfect at all temperatures it just won't go when it warms up. Unplugged the TPS, no change, was thinking electronic ignition module but not sure if it has one or where it is if it does.
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98 ford Ranger 2.5L.
I have not heat from the vents, doesn't get warm at all. If I idle the enginer in 30 Degree weather it gets to almost the C.
Upper Radiator hose is hot, I have verified the thermostat is new and it opens at 192 degrees as it should. Replaced the Water Pump, Fan spins freely.
I have attempted to burp the system, it isn't kicking out anymore air from the lines that I can tell. I used a large funnel and filled it with Anti-freeze, it filled the radiator, burped the system and the reservoir filled to overflowing. All with the engine hot. (To be specific the funnel was always full of fluid so no air could get sucked backwards)
The heater core hose on the left when looking from the front of the vehicle does not get hot, the one on the right gets warm. I theorize that the heater core is clogged up somehow and that is why that left line doesn't get hot. There is no fluid in the cab of the truck from the core.
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Problem: The exterior temp. gauge is blank.
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I think I've seen a thread on here about similar issues but I was unable to find it. I'm also not sure how to take the overhead console off yet. The console consists of ext. temp gauge, sun glasses compartment, and compartment for a garage door opener.
Some truck specs:
Year: 2001
Model: F150 Super-crew
Motor: 4.6L
Mileage: 250,000
Color: Silver
Original motor, second transmission.
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Also I have noticed that behind the seat on both side it gets wet and I have that window that you can open in the middle, would it be coming from there?
Also what would cause the doors to freeze and you have to pull as hard to get them open in the Winter time, are the seals bad on the doors?
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I know the engine has been replaced, with about 20k on it.
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When we have a heavy rain water leaks in on both sides saturating the floor board.
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Any advice on bleeding the coolant after I get it back together?
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