What would cause the oil pressure gauge on your 1991 S15 jimmy not to work and how do you fix it?
Have you change the oil pressure sending unit, that's what I had to do.
A compound gauge is a pressure gauge that displays both negative and positive gauge pressure measurements. Gauge pressure is a measurement of pressure relative to ambient pressure. For example, if ambient pressure was 14.7 PSI and you were to measure absolute vaccum using a compound gauge, the gauge would indicate -14.7 PSI.
Gauge pressure usually refers to the pressure difference between ambient, atmospheric pressure and the pressure in a vessel or line. A gauge pressure of zero would mean that the vessel or line was at atmospheric pressure. Normally the pressures of interest are ABOVE atmospheric so the gauge pressure is positive. Vacuum gauge pressure measures how far BELOW atmospheric pressure a vessel or line is. As such vacuum gauge pressure may be measured as a negative…
The simplest method would be to mount a pressure gauge onto the chamber, then to observe whether the reading changes. It should remain at "zero" indicated gauge pressure. If your instrumentation is relative to atmospheric pressure, it would be a "minus" pressure and would vary with local atmospheric pressure. For very accurate readings, you would need something more sophisticated, such as an ionisation gauge.
Many sending units do not have continuity below 6-7psi. This would cause the gauge to read nothing and indicate a base engine problem. Some type of engine noise would be associated with this concern (ie. ticking, rattling). The sending unit or wire to the gauge could be open. This would be an electrical problem and have nothing to do with the engine. Along that same line would be a defective gauge.
What problem would you have if your 1992 Chevrolet Cheyenne 1500 is not getting enough gas to keep it idling?
Need to check fuel pressure with a gauge first. Then check fuel pressure regulator. Need to check fuel pressure with a gauge first. Then check fuel pressure regulator. Need to check fuel pressure with a gauge first. Then check fuel pressure regulator. Need to check fuel pressure with a gauge first. Then check fuel pressure regulator.
What is the cause for your 97 Checy Tahoe LT oil pressure gauge fluctuating constantly and idle is not staying constant Idle revs when in Neutral?
Is it possible for the oil filter gasket to blow on a Chrysler spirit and would the oil pump be the cause of it?
Assuming we are using a pressure transducer to measure barometric pressure, I understand that a gauge type transducer would be used. The internal diaphragm would have a fixed pressure behind it (at a guess would be at standard temp/pressure, STP, ie 20 deg C @ 1013mb), so the transducer has a reference to work against. The front of the diaphragm would be exposed to atmosphere. I would assume the reference (gauge) pressure would vary as…