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16 votes
Accepted

Car oil pressure gauge flips between 0 and 100%

Since this is a Tahoe, I'm going to assume it has the 5.3L LM7 (LSx variant) in it. These have an oil pressure sensor at the back top of the engine under the cowl portion (near the windshield). It ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes

Why do modern vehicles omit a temperature gauge?

Your sample may just be non-representative. All the ones I know (I'm mostly into Japanese performance cars) have oil temps. Even many non-performance cars have an indicator that goes out once the ...
Rory Alsop's user avatar
  • 18.6k
4 votes
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Re-wiring Harness in Jet Boat w/ Ford 460

Do you know what each gauge is rated at for current carrying capacity? I would think a daisy chain is fine as long as the wire gauge is large enough. Don't neglect to use the same gauge of wire for ...
zipzit's user avatar
  • 6,539
4 votes

Temperature gauge goes down when I drive for a distance, but is usually in the middle driving in town

It "sounds" as though from your explanation your thermostat is staying open partially when the engine is cooled to normal levels. When you're travelling down the road, there is a greater flow of air ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

Car oil pressure gauge flips between 0 and 100%

There is a oil pressure sensor that screws into the engine block or head. An electrical connector on the sensor connects the sensor to the vehicle's wiring harness. The sensor electrical signal is ...
HandyHowie's user avatar
  • 25.2k
3 votes

2005 Chevy Impala Gas Gauge shows half reading when gas is empty

I would suggest the sender in the tank is probably bad. It's probably getting stuck at the half way point in its transition towards empty. This could be an obstruction not allowing it to go down all ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

Audi temperature gauge not working correctly

One option would be to fit an aftermarket temperature gauge - You can buy various sorts for fitting to kit cars and classics, and a full kit will also come with a suitable sensor to fit into one of ...
Nick C's user avatar
  • 28.7k
3 votes
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2001 pontiac montana minivan- gas gauge does not work

Disconnect the fuel gauge sending wire from the fuel tank sending unit, with key on the fuel gauge will either go to Full or empty, now ground the fuel sender wire to a good ground, the gauge should ...
Moab's user avatar
  • 7,990
3 votes
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Tachometer reading fluctuates at constant engine load/speed

You're getting an intermittent signal to the tach from the ECU or the tach sensor. If the tach comes from the ECU (which it seems to after a bit of Googling, but I don't know Miatas well enough to be ...
dlu's user avatar
  • 14.5k
3 votes

Car oil pressure gauge flips between 0 and 100%

I would connect a "physical" pressure gauge (Bourdon gauge) with a pipe and check the actual pressure. I would do this as soon as possible to make sure that there is no problem with a ...
Solar Mike's user avatar
  • 34.6k
3 votes

Saturn ion 2007 Temperature gauge

You should scan the engine for codes. On a Saturn you can have a P0128 (low coolant temp) code for a while with no check engine light. When you get a P0128 code, the ECM will turn on the engine fans, ...
MTA's user avatar
  • 6,140
2 votes

External regulator just installed and now there is a battery drain that kills my car

Certainly the issue would probably have to do with the last change made to the system. I'm sure this doesn't escape you. You will need to test for parasitic drain if you want to nail the issue down. ...
DucatiKiller's user avatar
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2 votes
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How does Audi A6 C6 battery level meter work?

I found the answer in this manual. Basically, the Battery Management Control Unit uses: current draw on the battery (measured at the control unit) temperature of the battery (measured at the control ...
tlhIngan's user avatar
  • 12.2k
2 votes

Instrument cluster malfunction

This appears to be a known issue with the 2007 Toyota Camry. Here is a list of consumer complaints to the NHTSA. First, call the Dealership, give them your VIN and ask if there are any recalls ...
CharlieRB's user avatar
  • 9,015
2 votes
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How to know the volume of gasoline used exactly based on the mileage of a truck?

Best way is to record the actual mileage on the receipt as you pay for the fuel : then from the past receipts you have distance per tank and cumulative and the exact volumes of fuel. Just calculation ...
Solar Mike's user avatar
  • 34.6k
2 votes

Is it possible to splice in a 2nd temperature gauge?

It should come with its own sensor - the sensor needs to be matched to the gauge... If you connect the gauge to the existing sensor it may disrupt the signal to the ecu and cause all sorts of ...
Solar Mike's user avatar
  • 34.6k
2 votes
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Diagnosing stuck temperature gauge on Vauxhall Astra Mk3/F

The issue is either the sender (most likely), the gauge, or the wiring between them. Some vehicles have a separate sender for the gauge. The usual way to test the sender is to measure the resistance ...
rpmerf's user avatar
  • 8,403
2 votes

My Harley Davidson's fuel gauge has become very erratic over the last week

An electronic solution to the engineering problem of damping might be easier than complicating the mechanical sensor inside the fuel tank. Indeed this Harley-Davidson forum has: fuel gauge Q. . . one ...
Weather Vane's user avatar
  • 2,289
1 vote

A/C: Why does the LOW-side pressure *increase* when the compressor runs?

As we say in the software world, this turned out to be a PEBKAC error. (Problem Exists Between Keyboard And Chair) I put it back together and vacuumed it out again, not expecting anything different, ...
AaronD's user avatar
  • 612
1 vote

Fuel Gauge Inaccurate

I have never had any car with an "accurate" fuel gauge. Not going to go into any definition of "accurate"... But, at best, I take the gauge as showing "at least half full" or "time to consider ...
Solar Mike's user avatar
  • 34.6k
1 vote

2007 bmw 318i on red temp gauge within 5 minutes of starting

When the temp gauge goes up into the red, lift the hood and look, and touch gently: is the motor hot? If the motor isn't overheating, then the temperature gauge, wiring, or coolant sensor is faulty. ...
DavidRecallsMonica's user avatar
1 vote
Accepted

Which tire pressure gauge can I trust?

A precision mechanical gauge with correct range for your application is one you can trust. For your application, I recommend a 0 - 60 PSI mechanical gauge. If the scale goes up to higher values than ...
juhist's user avatar
  • 14.5k
1 vote

Why won't my gas gauge fill past 3/4?

Your float in gas tank has either got something stuck in it keeping it from going on to full tank, or it's got a dead spot and your sensor's not reading. More than likely your vehicle hit a pothole ...
william reeder's user avatar
1 vote

Which value should takes to show Gauge value, Fuel pressure or Intake Manifold Pressure?

Gauge pressure (GP) is linked to absolute pressure (AP) by atmospheric pressure as in : AP = GP + atmos p Units can be Bar, Pascals, psi, mmH2O, inHg etc But you can have them selected based on ...
Solar Mike's user avatar
  • 34.6k
1 vote

Fuel gauge not working on 50cc moped

Step 1: check the gauge works - usually grounding the wire to the tank unit cause a full-scale reading, if good proceed to step 2, if not check wire from gauge, gauge and supply. Step 2: connect tank ...
Solar Mike's user avatar
  • 34.6k
1 vote

Fuel needle problem

If the needle goes down when the tank is getting empty (IOW: The bottom half still works) the culprit is most likely the rheostat which is attached to the float now is not working correctly. This ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
1 vote
Accepted

Is there a difference between a cylinder compression gauge and an oil pressure gauge?

I guess it really depends on how you look at it, but yes, they are two different specific tools. They are the same in the respect they measure pressures. They are different in that one measures ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
1 vote

Voltage Regulator problems on a 2000 Plymouth Neon

On that MY Neon an "intake air gauge" doesn't have anything to do with the charging circuit. The amount of amperage produced by the generator is controlled by Electronic Voltage Regulator (EVR) ...
Ben's user avatar
  • 10.7k
1 vote

Possible causes for a high temp gauge?

So, if your sensor/sending unit is giving wrong data, your check engine light should be lit. If for some reason that didn't happen another way to check is by disconnecting the temp sensor altogether. ...
kyle_engineer's user avatar
1 vote

Possible causes for a high temp gauge?

I think you can diagnose it easily and diagnosis probably do not require any work under the hood. You, or your mechanic should connect to your OBD port and check what the computer thinks the ...
Evren Yurtesen's user avatar

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