【正文】 In severe cases of clogged radiators， it is necessary to remove them and have them cleaned by specialized equipment． 散熱器嚴(yán)重阻塞時，可將散熱器拆卸，并用專門的設(shè)備對散熱器進(jìn)行清理。 語法： It is?to 中的 it是形式主語。此句的原始順序是 to remove them and have them cleaned by specialized equipment is necessary．在英語中表達(dá)中，為了避免主語太長，造成句子頭重腳輕，常用 it作為形式主語來引導(dǎo)整個句子，詞序需改變。 NOTE 3 When oil is being consumed by passing through the engine， it usually will cause heavy blue smoke to e from the exhaust． particularly after the engine has idled for several minutes． 潤滑油竄到燃燒室燃燒時，通常會產(chǎn)生濃的藍(lán)煙從排氣管中排出，這種現(xiàn)象在發(fā)動機(jī)怠速了一段時間后更加明顯。 語法： When和 after引導(dǎo)的從句都是時間狀語從句。 NOTE 4 Piston slap results from word pistons or cylinders，collapsed piston skirts， excessive piston． tocylinder wall clearance， misaligned connecting rods， or a lack of lubricating oil． 活塞敲缸聲是因活塞或氣缸的磨損、活塞裙部變形、活塞與氣缸壁間間隙過大、連桿變形、以及潤滑油不足等而產(chǎn)生的。 Result?from 表示“（因而）發(fā)生，產(chǎn)生，出現(xiàn)”。強(qiáng)調(diào)的是原因。 例如： injuries resulting from a fall因摔倒而受的傷。 區(qū)別于 result?in 。它表示“產(chǎn)生某種作用或結(jié)果”。強(qiáng)調(diào)的是結(jié)果。 例如： The efforts resulted in success．我們的努力終于成功了。 NOTE 5 Valvetrain noise is brought about by improper valve adjustment， worn or damaged parts， dirty hydraulic lifter．or lack of clean lubricating oil． 氣門機(jī)構(gòu)噪聲是因氣門調(diào)整不正確、氣門部件磨損或損壞、液壓挺桿污染、以及潤滑油雜質(zhì)過多等而產(chǎn)生的。 NOTE 6 Detonation knock in an engine is usually the product of advanced ignition timing， excessive carbon buildup in the bustion chambers， or use of too low an octane fuel． 發(fā)動機(jī)爆燃敲擊聲通常是因點火提前、燃燒室內(nèi)積炭過多以及燃料油的辛烷值過低等而產(chǎn)生的。 Lesson Two Fuel Injection Manual 第二課 燃油噴射系統(tǒng)維修手冊 Pretest System Checks 系統(tǒng)預(yù)備檢查 Fuel system 燃油系 Electrical System 電路系統(tǒng) Battery＆ Charging System 蓄電池和充電系 Miscellaneous 其他項目 Typical Fuel Injection Pressure Test 典型燃油噴射壓力測試 Procedure to Relieve Fuel System Pressure 釋放燃油系油壓發(fā)熱步驟 ?? Pretest System Checks 系統(tǒng)預(yù)備檢查 The following basic checks should be performed and any detected faults corrected before． e a fuel system test is performed． 對燃油供給系測試前，先要進(jìn)行下列基本檢查，并將所有檢查出的故障排除。 Fuel system 燃油系 for broken or 1oose fuel 1ines（ metal or rubber）． sure fuel tank has sufficient fuel（ do not rely on fuel gauge）． for water or other contaminants in fuel． condition of fuel system related fuses． condition of fuel tank venting systems． condition of fuel tank filler cap． （金屬或橡膠）斷裂或松動。 （不要依賴油表讀數(shù)）。 。 。 。 。 Electrical System 電路系統(tǒng) engine won’ t start， check for ignition spark using a test plug． If no spark， repair ignition system． check engine lamps or other puter fault indicators． for ignition wires broken， disconnected or arcing． for distributor cap or rotor disconnected or arcing． for ponent grounds 1oose or corroded． for disconnected electrical ponents． ，用測試火花塞檢查火花強(qiáng)度。如無火花，維修點火系。 。 、未連接或放火花情況。 。 。 。 Battery＆ Charging System 蓄電池和充電系 battery condition． A weak battery will not ensure proper pump delivery or injector triggering． Should be over 12 volts． basic operation of charging system． for loose or corroded battery cables． 。蓄電池容量不足將不能保證正確的油泵泵送量和噴油器的觸發(fā)。蓄電池電壓應(yīng)高于 12伏。 。 。 Miscellaneous 其他項目 vacuum lines for loose or disconnected lines． for water leaks． for excessive oil leaks． for any audible air leaks， unusual noises，fuel pump buzz（ a noisy pump may not be an indication of poor operating condition）， engine rattles or knocks． Valve timing and adjustment． 。 。 。 ，油泵嗡嗡聲（油泵有聲音并不意味著工作不良），發(fā)動機(jī)卡嗒卡嗒聲或爆震聲。 。 Typical Fuel Injection Pressure Test 典型燃油噴射壓力測試 All pressure tests should be made at idle on the highpressure side of the system． 所有壓力測試均在發(fā)動機(jī)怠速下，測定燃油系的高壓側(cè)壓力。 engine off， locate fuel pressure port（ Schrader Valve） and attach fuel pressure gauge． If no schrader Valve is provided and system must be opened， residual pressure must be released before fittings are loosened to keep gasoline from spraying all over， possibly causing eye injury or a fire． Connect tester using the correct adapter and access point． Always wrap a shop towel around fitting before loosening． ，查找油壓端口（斯奇拉德閥）并安裝燃油壓力表。如沒有斯奇拉德閥，而又要將燃油系打開時，必需在這之前將殘壓釋放，以便防止汽油四處噴射，引起眼睛受傷或火災(zāi)。使用合適的連接器和入口將測試儀連接好。通常用車間用毛巾裹在要旋松的裝置上。 the adapter you use is a banjo bolt adapter， ours is designed to use with standard banjos． If a car manufacturer uses a nonstandard banjo， more than one washer may be needed on either or both sides of the banjo． ，而我們提供的是標(biāo)準(zhǔn)中空管。如果汽車廠使用非標(biāo)準(zhǔn)中空管，則在中空管一端或兩端均需要使用墊片。 gauge connected to system using proper adapters， reactivate fuel pump． start the engine and check for leaks． If no leaks are detected， observe gauge． Pressure should rise to slightly above operating pressure and then stabilize at operating pressure． ，起動油泵，起動發(fā)動機(jī)并檢查泄漏。如果未發(fā)現(xiàn)泄漏，觀察油表。壓力應(yīng)慢慢升到超過工作壓力然后穩(wěn)定在工作壓力上。 engine． If an adjustable fuel pressure regulator is used， pressure should be maintained during running． If a pensating fuel pressure regulator is used， pressure should drop approximately 89 PSI， depending on manifold vacuum． 。若使用了可調(diào)節(jié)式燃油壓力調(diào)節(jié)器，燃油壓力在發(fā)動機(jī)運(yùn)行中將保持恒定。如果采用補(bǔ)償式燃油壓力調(diào)節(jié)器，則根據(jù)不同的歧管真空度，燃油壓力將下降大約 89PSI。 a flexible hose on the return side and gently squeeze off return flow briefly． Never squeeze a steel braided hose． CAUTION： Some pump designs can be damaged by this test and test should not be performed unless remended by manufacturer． Observe rapid increase in deadend pressure． CAUTION： Pressure could exceed 75 PSI and may blow any loose fittings or defective lines． Observe condition of