[HMUSN]

^ a mechanical oil pressure gauge

[Modified88Dreamer]

Originally Posted by 99v6stang okey i changed the oil and oil filter, and the pressure sensor. Still shows no pressure after i started the car, and now it threw P0453 Fuel Tank Pressure Signal circuit Input above maximum which im assuming has something to due with the svt fuel pump i just put in, what is wrong there? I only ran the car for about 10 seconds but it sounds like it is knocking or something and isnt making good sounds. Yes possibly the cam bearings could have gotten damaged, but i dont know. Would a scratch or something cause this or would it have to be the thing destroyed

When you put the new pump in you could have done damage to FTP sensor. Other possible causes could be that the FTP circuit is open, a damaged PCM which I highly doubt, SIG RTN circuit could be open, VREF (reference voltage) shorted to VPWR, and last the FTP could be shorting to the VREF or VPWR. If you can monitor the FTP V PID reading greater than 4.5 volts with Key On Engine Off it indicates a hard fault. Also would like to add that if and when you monitor the oil pressure from a mechanical one it should read 40-125 psi at 2500 rpm (Hot)

[stephen]

Originally Posted by 99v6stang the fuel pump was a 310 vmp svt fuel pump so it shouldnt have any problems I will check about the oil filter. That would have for sure filled up in like ten seconds of running? Yes. What kind of a guage do i need to check the oil pressure.

Any kind of after market mechanical gauge will work ( I have a VDO). They connect up by tubing with a compression fitting on the end. You will probably need an adaptor to connect it in place of the oil pressure sender. If you take the oil pressure sender with you they can determine the thread size. For a Mustang the correct adaptor may come with the gauge.

[stephen]

This is one option for an oil pressure gauge

http://store.summitracing.com/partde...5&autoview=sku

[99v6stang]

so what do you guys think could be causing this problem?

[stephen]

Originally Posted by 99v6stang so what do you guys think could be causing this problem?

I haven't posted further on this because I assumed you want to get other opinions.

Did you check if the oil filter filled up? If it did the oil pump is working.

It would be useful to measure the oil pressure with a gauge just to be sure, but since your also hearing engine noise, I think you really do have low oil pressure.

Possible causes are excessive clearances in the oil pump, a stuck pressure relief valve, or excessive clearances in the bearings.

[99v6stang]

ok well i havent figured out anything but im pulling the motor tonight and checking for possibly warn bearings or a bent rod or who knows what. Im hoping to leave the heads on because dont wanna pay $100 for new gaskets.