Where is the low pressure port for ac on a 2001 ford f250 diesel 7.3 liter v-8

There is no single torque specification for the injectors on a 1991 Ford F250 7.3 liter diesel IDI. Each injector has a specific torque spec, typically between 8-16 Nm.

It is worth ensuring the glow plugs are actually receiving current by attaching a test lamp during the starting process. Heater plug timer relays can cause problems.

A good cranking speed is necessary for good cold starting and also good injector spray patterns and break-off pressures. Bad spray patterns and low pressures, slow cranking and fuel drain-back are common problems.
Low compression pressures can also be a problem. If the other stuff has been checked and found to be ok it is worth having them tested.

you need to ask a shop certified to work on AC system. It is a federal law that you can't.

Passenger side by fire wall under some elec. connector on accumulator, port point about 45 deg. angel towards engine.

HI OR LOW MILEAGE I WOULD FIX THE OIL LEAK.LOSING OIL COSTING YOU MONEY.

Sounds like a bad head gasket.

first thing i would check is the wiring were the plow wiring is spliced in at this is most likly the culprate. or you may have a bad multi function switch in the steering column

on fords ussualy at reciever drier,if not follow large ac line till you find the schrader port.

look for lo and hi on the cap.
please see this layout diagram... and you can trace it down yourself.


The lines coming on the dryer canister are HI side.
Use the opposite one to charge.

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this is an oil pressure problem, either a sensor is not sensing enough oil pressure, or the high pressure pump is not building enough pressure(possibly leaking or head is leaking). this engine requires 450 psi minimum oil pressure at the injectors to actuate the injectors.