1991 240 runs very rich at low speeds. Cold start injector leaking, or ECU's temp sensor AWOL. With the control unit connected , connect a voltmeter across LH ECU terminals 13 and 5 (ground) for Bosch LH 2.4 systems or terminals 2 and 5 (ground) for LH 2.2 systems. This unit is in the passenger sid...

Was the original gasket used back when the 1990 engines were assembled the same as today's items? Many OEM parts used are created by other vendors. For instance, the rear axle bearings used on redblock Volvos were used on other RWD OEM vehicles, and had various part numbers: This genuine Timken Whe...

Why would you be looking for a MAP (Manifold Absolute Pressure) sensor on a 1990 240?

...240 2.3 1990...Why in the parts online shop say me this MAP its working? In US, Volvo used 1982 B21F Bosch LH 1.0 / 2.0 1983-1984 Bosch LH 2.1 1985-1989 Bosch LH 2.2 1989-1993 Bosch LH 2.4 1990-1993 Bosch LH 3.1 LH 2.3 - " ... Porsche 928 from the 1987 model year until the car ceased produc...

NGK 92477 = Volvo 1378162
On a metal plate near the left fender. Rubber hose running to intake manifold.

Looks like it is at same location as the Ignition coil.

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MALL240 wrote: ↑25 Feb 2020, 01:02 My engine is B230F

When I search with a B230F configuration, the part number does not come up. No engine pressure sensors come up for a B230F configuration. B230K configuration ... yes as shown above.

If you have a lot of kilometers on the car keep this in mind. A replacement fuel regulator does not need to last forever, it just needs to out last the car. You can get after market fuel regulators for about € 50.00 .

Scratch that, I looked at the pictures in your other post. You do have a OBD port. Do you need instruction on how to retrive the Diagnostics Trouble Codes (DTCs)?

DTCs give one a clue as to what is wrong. That is way better then trial and error diagnostics.