Erratic Oil Pressure
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Joined: Feb 2005
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From: Maple Ridge, British Columbia
Erratic Oil Pressure
Howdy,
well, I've got a question about my '03 dodge. I've noticed that my oil pressure gauge is all over the map. AFAIK the actual numbers on the guage are different up here than yours, so I'll be as generic as I can.
When I start it up, it sits at about a 3/4-11/16 position (assuming far left is 0 and far right is 1, and dead center is 1/2) but it also falls down to nearly 1/4, or just a hair above the redline. When accelerating, it steadily increases from 1/4 to about 7/16, and when the accelerator is released, it falls back to 1/4. No codes have been thrown. If my oil pressure was steadily lower, I would assume an injector problem or something like that, but its all over the place. Anyone have any ideas??
Edit** Bad sending unit??
well, I've got a question about my '03 dodge. I've noticed that my oil pressure gauge is all over the map. AFAIK the actual numbers on the guage are different up here than yours, so I'll be as generic as I can.
When I start it up, it sits at about a 3/4-11/16 position (assuming far left is 0 and far right is 1, and dead center is 1/2) but it also falls down to nearly 1/4, or just a hair above the redline. When accelerating, it steadily increases from 1/4 to about 7/16, and when the accelerator is released, it falls back to 1/4. No codes have been thrown. If my oil pressure was steadily lower, I would assume an injector problem or something like that, but its all over the place. Anyone have any ideas??
Edit** Bad sending unit??
You don't want to know the cost unless you still "got warranty".
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Joined: Mar 2004
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From: markham, ontario, canada
there is no oil pressure sensor on our engines. there is a 6psi oil pressure switch. anything over 6 psi and the ecm controls the movement of the gauge in the cluster according to what the coolent temp is, the air temp is, the engine speed... it calculates what the approx. oil pressure should be and shows that...
Originally Posted by factory service manual
Engine Oil Pressure Message - The instrument cluster circuitry restricts the oil pressure gauge needle operation
in order to provide readings that are consistent with customer expectations. For all models except
SRT10, each time the cluster receives a message from the PCM or ECM indicating the engine oil pressure is
above about 41 kPa (6 psi) the cluster holds the gauge needle at a point near the middle increment within the
normal range on the gauge scale. For SRT10 models, each time the cluster receives a message from the
PCM indicating the engine oil pressure is above about 41 kPa (6 psi) the cluster moves the gauge needle in
a linear fashion to the proper relative pressure position of the gauge scale.
in order to provide readings that are consistent with customer expectations. For all models except
SRT10, each time the cluster receives a message from the PCM or ECM indicating the engine oil pressure is
above about 41 kPa (6 psi) the cluster holds the gauge needle at a point near the middle increment within the
normal range on the gauge scale. For SRT10 models, each time the cluster receives a message from the
PCM indicating the engine oil pressure is above about 41 kPa (6 psi) the cluster moves the gauge needle in
a linear fashion to the proper relative pressure position of the gauge scale.
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GlennRMK
HELP!
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May 24, 2007 10:46 PM