I'm just finishing my MPI install on my project. Can anyone tell me what to do with the oil pressure sensor? I have a small brass manifold sticking out of the block. I know one hole is for the oil gauge and the other is for a sensor. Does the MPI ECM not need to know the oil pressure?
MPI 4.2L Oil Sensor Question
Jun 22, 2004
14 Replies
Nope..
So I plug the hole and toss the sensor?
Thanks! I'll do that.
All of the fittings are defined inthe instruction booklet.
When I installed the MPFI on my Jeep, I didn't go near the oil pressure sender. You are correct, the ECM doesn't need to know oil pressure.
I am not sure I would advixe you to toss the sensor, YOU need to know what the oil pressure is doing, just the ECM doesn't need to know.
It's a frame off, ALL the sensors were pulled. There are presently ONLY the wires in the loom from the MPI on the engine, there are NO others installed yet. I had just assumed that the new ECM would want the oil info just as the old one had. Painless is gonna send me the new looms and wires.
As for the oil pressure, there were two in one boss, one was for the old ECM the other is for the gauge. Apparently I lose one, since the ECM isn't interested in it.
I don't know what engine this is out of, but the failed Ford excuse for an emissions computer on the Jeep 4.2 does not use any oil pressure sensors.
Stock you have one for the gauge on the dash only.
The oil switch below the pressure sensor is used for the choke and manifold intake heater coil. It is switched on with oil pressure only.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT'sJeepers wrote:
Oh. I had just assumed that since there was another sensor it was for the computer. I was wrong.
So, I still don't need it then?
Mike according to my manual, the extra wire was for a low oil pressure shut down ckt. Not sure how or if it worked though
Does the MPI use it for a safety shut down?
If so, then the OP sure needs it.
Mike
Richard Harris wrote:
No my Mopar kit doesn't use the Op shutdown ckt.
Toss that manual. There is no low oil pressure shut down circuit.
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