98 s70 Need to know CORRECT Fuel Pressure

s70fanman · Post by **s70fanman** » 15 Mar 2015, 11:49

Gentlemen-
I am having intermittent #5 misfire and I have done EVERYTHING,(cap,rotor,plugs new plug wires, compression test) and have finally come to low fuel pressure, IPD says 43 lbs per in. at the Schrader Valve, yet Chilton says for a 1998 2.3 T5 is 58 lbs per in. What I really, really want to know is WHAT is the correct pressure?? I have a 2.3 T5 motor in a 1998 S70 with some minor upgrades and other than this problem the car flat RUNS.

Thanx, S70fanman

Post by **Ozark Lee** » 15 Mar 2015, 11:55

43 psi is the correct number for a '98. Actually it is 43 and a decimal since it is converted from a factory spec that is in BAR. The accuracy of most pressure gauges is suspect so a number that is in that general area is good enough.

A fuel pressure problem wouldn't limit itself to cylinder 5, it would be across the board.

...Lee

Post by **precopster** » 15 Mar 2015, 13:17

Swap injectors from 5 to another cylinder and see if the misfire moves..