Diesel Fuel Injection System Help Desk

[cocoy]

sir just out of the blue question..

how dirty is our diesel fuel compared to other asian countries.. specally thailand? i think u already know where im goin with this question.

[chilledoxygen]

Sir Dieseldude,

Update on my problem, sir my engine is a pajero 4m40 and may lumalabas na usok sa breather ng eninge which is connected sa air filter (when I removed it). When I opened the dip stick oil. May lumalabas din na usok pero minsan wala naman. I have no problem with power. Mahatak naman sha and Hindi hard starting pag umaga. Last february pina-"dukot" ko sha. I changed my piston rings and pinaover sized ko.

Does my engine need an overhaul or kaya mawala ung black smoke if i will calibrate my injection pump?

[Dieseldude]

Thank you Sir Dieseldude for the quick reply.. Dapat calibration na in case nde mag bago kung ni adjust ko n ung idling nya?

Wag muna. Temporarily replace the black rubber hose between the fuel filter and the injection pump with a clear plastic hose. Tingnan mo kung sumisipsip ng air bubbles ang pump.

[Dieseldude]

sir just out of the blue question..

how dirty is our diesel fuel compared to other asian countries.. specally thailand? I really don't know....., but I'm very happy with our local diesel fuel.
i think u already know where im goin with this question. Yes, I have an idea.

[Dieseldude]

Sir Dieseldude,

Update on my problem, sir my engine is a pajero 4m40 and may lumalabas na usok sa breather ng eninge which is connected sa air filter (when I removed it). When I opened the dip stick oil. May lumalabas din na usok pero minsan wala naman. This is engine blowby (combustion gasses which leak past the piston rings). Blowby is normal, low on new engines and steadily increasing as the engine ages due to normal wear on the rings.

I have no problem with power. Mahatak naman sha and Hindi hard starting pag umaga. Good.. Last february pina-"dukot" ko sha. I changed my piston rings and pinaover sized ko. Nag rebore ka ba ng cylinders?

Does my engine need an overhaul or kaya mawala ung black smoke if i will calibrate my injection pump? Check/replace air filter muna. Then compare smoke levels with and without the blowby hose connected to the air intake system.

[alrorskyz]

Hi to all diesel guru,

I need your advice. My ride is JDM pajero w/ turbo 4d56 and AT tranny. Bagong change oil, air filter and fuel filter last month lang. Nag simula ba ang problem pagkatapos ng change oil and filters? Hindi ko sure kailan nagsimula kasi si misis ang laging gumagamit nito, abroad kasi ako nagwork. Ano ang oil grade na ginamit mo? petron trekker 15w-40 Meron pa bang ibang ginalaw sa engine mo? wala po.

Bakit kapag bagong andar at hindi pa mainit ang engine ko very low ang rpm ko then pag mainit na nasa 900 then kung naka aircon naman nasa 1000.

Hindi ko mapatakbo kung malamig pa ang sasakyan dahil sobrang manginginig. Bakit di mo mapatakbo, wala bang power kung malamig? meron naman power but automatic kasi kung tapakan mo ang brake na malamig pa ang engine and naka drive sobrang manginginig ang engine. kailangan i-preheat ko muna for 2-4 mins para maganda na ang takbo. Do you experience white smoke when cold? wala naman white smoke sir.

Hindi naman siya hard starting just one click lang start na agad and hindi
rin mausok kahit biglan apak sa pedal. Dapat meron konting usok sa biglang tapak ng acc pedal. Meron bang power pag mainit na ang engine o kulang pa rin? wala naman ako problem sa power nito sir. ang problem ko lang ay sobrang low rpm basta malamig pa ang engine. i think mas mababa pa sa 750 rpm.
pinaadjust ko sa taga petron ang idle ko kaya nagiging 900 na but ganun parin kung malamig ang engine very low rpm parin.

thank you for your reply sir

Ano kaya ang problem nito?

Sir Dieseldude ano kaya ang problem nito? calibration naba?

[pleck]

bago lang ako sa diesel engine kakabili ko lang ng l400 ko local space gear pag kuha ko after 2-3 days sa akin change oil na ako, change oil filter , fuel filter, air filter lininis lang. then after 2 days nag salin ako ng oil ( may leak kase sa crankshaft oil seal ) pag open ko ng oil filter cap ko may usok so kinabahan agad ako hinugod ko agad dipstick wala pa naman usok dun at walang talsik ng oil after a week byahe ako makati pag check ko ng dipstick ko (hinugot ko ng konti ) may usok na din at talsik ng oil na pa konti konti

kanina nag pa compression test ako sabi ng mekaniko ok pa naman daw

ano kaya cause nitong usok sa dipstick at oil cap?

4D56T engine SPACEGEAR LOCAL max speed niya 80kph pwede pa pigain pero hirap na hirap

hindi ko na alam san ko dadalhin to at saan ipapagawa

btw one click pa din po space gear ko at no overheat hindi rin nag babawas ng langis sa oil not sure minsan ko lang kase gamitin

[Dieseldude]

Sir Dieseldude ano kaya ang problem nito? calibration naba?

Hindi ko pa alam ang solusyon sa problema mo. Itatanong ko bukas sa mga technicians ko.

[Dieseldude]

Pleck,

Normal ang konting usok/oil sa filler cap at dipstick sa mga high mileage engines.

80kph maximum speed is not normal. Baka barado lang ang air/fuel filters.... or pwede rin na calibration ang kelangan mo.

[rmpmla]

for those asking on idle up adjustment for 4d56 engine, ito po siya. these are the same ones provided before on this thread.





HTH

[rmpmla]

here is an explanation on bosch ve injection pump for cold start compensation


nangyari na rin sa akin yan low rpm during cold start (for WLT-31 engine). sira pala yung solenoid valve. pero habang di pa napalitan eh manual advance na lang . in short, depress na lang yung accelerator to attain higher RPM.

[cocoy]

sir just out of the blue question..

how dirty is our diesel fuel compared to other asian countries.. specally thailand? I really don't know....., but I'm very happy with our local diesel fuel.
i think u already know where im goin with this question. Yes, I have an idea.

thank you again sir..

just want to asked again. if in fact it hasnt been asked here before..
why is it that there are so many isuzu crosswinds that emit black or is just basically smoking..

i was looking at the engine bay of an isuzu crosswind very new model.. and i noticed that there is a water separator before the fuel filter..

this should therefore protect it from water contamination that could cause problems to the injection pump. but it has this device. so what is causing the smoke?

[ISO4113]

[QUOTE=cocoy;1523222]thank you again sir..

just want to asked again. if in fact it hasnt been asked here before..
why is it that there are so many isuzu crosswinds that emit black or is just basically smoking..

i was looking at the engine bay of an isuzu crosswind very new model.. and i noticed that there is a water separator before the fuel filter..

this should therefore protect it from water contamination that could cause problems to the injection pump. but it has this device. so what is causing the smoke?


I don't think it is a ISUZU Crosswind-speific problem; rather it is a maintenance problem. A lot of times, rather than replacing the air filter with a new one, 'pinalilinis lang nila' at dito nagsisimula ang black smoke.

The water separator is placed there so that water contamination will be minimized. It does not mean na never na magkaka tubig ang fuel system (e.g. pag hindi mo pinapalitan ang fuel filter na may tubig na. pag napuno yun, papasok na rin ang water sa fuel system.) and its not connected to the black smoke problem. contamination of water would lead to rusty injection pump and stuck up nozzles.

Regards,

ISO4113

[blue_gambit]

Diesel Experts, Good day.

Super mausok na po yung pajero fieldmaster 4m40 ko. Hindi naman po sha hard starting pag umaga. Ok naman sha with its acceleration. Pinakalibrate ko na lahat ng injectors ko, nothing happened. Pag naka idle, hindi naman sha umuusok. Pero pag binigla mo apak ang accelerator. Yun super usok na. Maitim yung usok.

What should be the main problem? It it my injection pump? Or it should be my turbo? I need your big help. Thanks

Malamang puro carbon deposit exhaust pipe mo sir, katulad nung nakasabay ko kagabi sa avenida. Lahat ng arangkada puro black smoke.

[Dieseldude]

Malamang puro carbon deposit exhaust pipe mo sir, katulad nung nakasabay ko kagabi sa avenida. Lahat ng arangkada puro black smoke.

Nanggagaling ang black smoke sa poorly maintained diesel engine, hindi sa exhaust pipe. Dumadaan lang ito sa exhaust pipe.

[alrorskyz]

Hindi ko pa alam ang solusyon sa problema mo. Itatanong ko bukas sa mga technicians ko.

thank you Sir.

[alrorskyz]

here is an explanation on bosch ve injection pump for cold start compensation


nangyari na rin sa akin yan low rpm during cold start (for WLT-31 engine). sira pala yung solenoid valve. pero habang di pa napalitan eh manual advance na lang . in short, depress na lang yung accelerator to attain higher RPM.

thank you sa info. I'm not sure if may solenoid valve ba ang 4d56.

[chilledoxygen]

Sir Dieseldude,

I have no problem with power. Mahatak naman sha and Hindi hard starting pag umaga. Good.. Last february pina-"dukot" ko sha. I changed my piston rings and pinaover sized ko. Nag rebore ka ba ng cylinders?

Does my engine need an overhaul or kaya mawala ung black smoke if i will calibrate my injection pump? Check/replace air filter muna. Then compare smoke levels with and without the blowby hose connected to the air intake system.

Di po ako nakapagrebore ng cylinders sir, kasi need ko ibaba yung engine pag ganun. Do I need to rebore my cylinder liners sir?

I did check and replace my air filter sir. The smoke levels dont change if i put my airfilter and blowby hose in the engine system cycle and still the same result of black smoke without those in place.

[chilledoxygen]

thank you sir rmpmla, for the idle up adjustment for 4d56 engine.

[Dieseldude]

thank you Sir.

Your problem seems to be air in the fuel system, or a faulty injection pump.