oil pressure sender

Is the oil p sender specific for this particular engines ford pcm 351 w with protech ingnition or they are just universal? I replaced my oil sendar wich was dead, with one from an Y block style engine we have down here. It has the same fittins and one wire electrical hook up as the one i replaced, but it will go to max reading when engine is running. Either the sender is not compatible or y still have to figure out my gremlins on the grounding issues on my electrical instalation.
Any ideas on how to check for bad ground on the entire boat installation...

what would be the differnce between an automotive sender and a marine one? The one i got is from auto use. how can i check the resistance range of both parts in order to make sure thats the problem and not a foulty gauge or ground issue....

Chris, Im pretty sure that there is a seperate switch (to the ECU) and sender (to the gauge) on the Pro-Tec set up. If he's got a regular automotive sender in there (1-wire hook up) and the Pro-Tec isnt putting the engine into limp mode, then they'd have to be seperate.

Sebastian, Im 99% certain that the automotive and marine senders are different. Do a search on here. Probably no need to verify- just get yourself the correct sender.

Sebastin,
The Pro Tec system uses a unigue oil sender.
Try Discount Inboard Marine. Search under the Pro Tec section to find the correct sender.
Jimsport93

Tim,
I did jump the gun. You are correct. The Protec pressure switch is different from the oil pressure sender.
I spoke with Vince at Discount Inboard Marine. He did say that the marine oil sender has different ohm resistance vs the automotive type.
Hope this helps.
Jimsport93

Well, yesterday while testing the boat i checked the oil pressure thing, guage works fine as when i disconect the cable it will go to zero and if i hit the engine block it will go to max. So bad sender. My logic says I need part 1236 from skidim.
Pd how do i post a link to another page? Stupid question for a senior member ahh

Tr, marine parts for American V8 engines are really hard to come by here, I ordered my pressure sending unit from skidim too.

Kapla, Barrera or Folino might have the part, It's the same sending unit for Ford and GM's so you could try a Mercruiser one.

Anyway, Skidim is great to deal with, see if there's something else you need to make shipment cheaper.

update
yesterday I went to pick up the parcel at the post office customs. After paying 6 dollar tax i have the new OPS from skidim, so total cost was $43 against 80 that I was asked at a local parts here, I think the 1 month wait was worth. I will install it this WE and let you know how it turned out!!!
Lucho whats that c#%& you`re selling on ML....
very expensive on my opinion....

Ill take a Shot.
If memory serves me their were two units on the oil pressure line that had what some call sending units. One is a sending unit for the oil pressure gauge the other is a oil pressure switch/sensor for protec system the warning light and will cause the motor to go into "limp mode" if it fails. Some times these units get confusing. Their should be a green wire that goes to the pressure switch/sensor. The blue goes to the pressure sending unit. The problem that I run into when talking to people with either sending unit problems or switch is that they can not identify what is what. I will use the term normally, normally the sending unit protrudes directly away from the block it is also "normally" a larger looking component. The switch is off set on the line in a T fashion and is "normally" smaller in size than that of the sending unit. You might want to make sure that these wires are going to the right units.
If you need a wiring diagram for that system I can copy and send you one.
Hopefully this helps in chasing down your problem.

Jody

Seb,
The sender is a variable resistor that changes the voltage to the gauge as oil pressure varies and the gauge is a volt meter only marked in PSI. Check the voltage you are getting to the "S" terminal on the gauge. You can also remove the wire from the "S" terminal (it goes to the sender) and check for resistance. It almost sounds like this wire is shorted to ground someplace. If you get close to 0 Ohms, then it's shorted. If not, then it's the gauge.

didn´t get the chance to do that.. but that was also the idea of my mechanic friend, to check resistance at the wire...
Maybe that was the problem and not the sender....
The gauge pegs out in the moment you hook the wire to the sender with the key on contact position, w/o the engine runing.. so I guess the ground issue is a possible culprit.

About the sender is the one from skidim for that engine..so it should be ok. Faulty? are this things delicate? can get damaged by movenment during transportation? or is something solid? how can I check if the sender is bad?
I´m stuck here...

I will have a tester for checking resistance... and let you know if any new...



sebastian

Yes Pete the first is the one I have...
Well did some testing. Reading w/o cable attached with the engine of was 240 ohms at the sender...
So we took the gauge, and connected with a piece of cable directly to the sender to check if the old cable was the culprit. Same thing, so the problem is the gauge. Needs to be recalibrated.... I took it to a guy that fixes them and will have a quote...
I think that moisture or water may have affected the gauge....
I will let you know what turns out!!!
Thanks
Sebastian

Pete

yes I took it to a guy that do automotive gauges, but he will take it to a guy that do marine gauges... they don´t mess with other fields!!!
Will have a quote....hope its fixeable...