MANUALS · FUEL [13] · страница 80 из 340 · Открыть оригинал PDF ↗

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(9) Measure the fuel pressure during idling:

Standard value:Approx. 270 kPa (2.7 kg/cm?
38 psi) at curb idle

(1O)Disconnect the vacuum hose from the fuel pressure regulator,
and then measure the fuel pressure whileusinga finger to
plug the end of the hose_

Standard value:

330-370 kPa (3.3-3.5 kglcm?
47-53 psi) at curb idle speed

(11)Check to be sure that the fuel pressure during idling does not
decrease even after the engine is raced a few times

(12)Usefinger to gentlypressthefuel returnhosewhile
repeatedly racing the engine, and check to be sure that there
is fuel pressure in the return hose also
NOTE

There will be no fuel pressure in the return hose if there is
insufficient fuel flow.

(13)If the fuel pressure measured in steps (9) to (12) deviatesfrom
the standard value range, check for the probable cause by
referring to the table below, and then make the appropriate
repair.

Таблица в оригинале

Распознанный текст таблицы — требует сверки с оригиналом

Condition	Probable cause	Remedy
Fuel pressure is too low. Fuel pressure drops during racing:	Fuel filter is clogged.	Replace the fuel filter:
No fuel pressure in fuel return hose.	Malfunction of the valve seat within the fuel pressure regulator, fuel leakage to return side caused by spring deteri- oration:	Replace the fuel pressure regulator.
	Fuel pump low discharge pressure	Replace the fuel pump
Fuel pressure is too high.	The valve within the fuel pressure reg- sticking: ulator is	Replace the fuel pressure regulator.
	Clogging of the fuel return hose andlor thepipe.	Clean or replace the hose andlor pipe
No change of the fuel pressure when vacuum hose is connected and when not connected.	Damaged vacuum hose or nipple clog- ging:	Replace the vacuum hose, clean the nipple_

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