Diesel Fuel Injection System Help Desk

[Dieseldude]

Hi Tsikoters,

nakapunta ako onetime sa isang calibration center (davao), then pinatingnan ko sa expert nila kung dapat bang calibrate na injector ko, xtrm 2000, 4ja1. Sabi nya, ok pa naman, pero medyo not that good na kasi sa FC, so sabi nya pwede ma replace yung nozzle, gawing medyo matipid yung buga ng fuel.... ano kaya maging epekto if gawin yun? di kaya mawalan ng konting power? Ang pump and injectors ay inaadjust para sumunod sa specifications. Yan ang ibig sabihin ng calibration. Mababawasan ng power kung babawasan ang output para tumipid ang konsumo.

though im sure, may chance na gaganda ang FC. Please advice naman sa mga nakagawa na nito.. medyo mahal din yung per nozzle, 1.5K each daw.

tia

[Dieseldude]

Hi. how do you check your turbocharger if it's still working fine or not? Use a boost pressure gauge, read boost pressure with engine fully loaded, compare your reading with manufacturer's specsifications. This is the correct method.

My crdi engine is running pretty slow and black smoke from the exhaust. When I floor it wala ako nararamdaman na boost from the turbo unlike before. The engine makes a whizzing sound na parang dynamo. Is there an easy do it yourself way of checking out if the turbo is working fine? The DIY way; grasp the air discharge hose from the turbo and rev up the engine. Hose will expand if turbo is working.

[Dieseldude]

Hi DD,

I see a small wiff of black smoke sa startup pero nawawala naman agad. Even when I drive hard halos walang visible black smoke. Dati kasi sa startup parang wala naman (or di ko lang napapansin). Normal lang ba ito?
Yes this is normal.

Parang may kalakasan na rin sa FC, I get 7km/L in moderate to heavy traffic around Manila. I think di pa nase-servican ang injection pump / nozzles neto. Will cleaning improve my FC? Advisable bang i-lean ang fuel delivery? Leaning fuel delivery is not calibration. It is modifying.....not conforming to specs.
BTW fuel filter is wayyyy due for replacement na, still finding OEM kasi but will VIC do the job? Replace air and fuel filters.

Ride pala is a Terrano TD27T SUVic A/T. Many thanks!

[Dieseldude]

Sir, hindi ko po alam kung tama ang napasukan kong thread.

Ask lang po, pag nagpaFull tank po kasi ako sa gasoline station, nakaka-ilang click yung nozzle bago mapuno talaga. Kita mo na halos puno na talaga ng fuel tapos maya maya bababa na yung fuel, eh d fill na ulit yung gas boy tapos magclick na naman yung nozzle tapos bababa ulit ang fuel. Normal lang po ba ang ganito? Thanks po. Dapat tigilan ang pagkarga ng fuel pag nag click na yung fuel dispenser. Kelangan ng air space sa loob ng fuel tank para sa thermal expansion ng fuel. Over filling na kung ilan ulit ang click. Kung minsan, pwede rin tumapon ang fuel.

BTW, 2014 Hyundai Accent Hatch CRDI po ito.

[alx]

sir patulog po re revo diesel engine..

upto 3rpm lang sagad na sa flooring ang apak then pag malapit na sa 3rpm nanginginig na ang engine..

medyo mabagal din hatak at hirap lalo pag paakyat.

ano kaya problem nito?

[Dieseldude]

sir patulog po re revo diesel engine..

upto 3rpm lang sagad na sa flooring ang apak then pag malapit na sa 3rpm nanginginig na ang engine..

medyo mabagal din hatak at hirap lalo pag paakyat.

ano kaya problem nito?

Have you replaced your filters/aircleaners? Ano mileage mo?

[alx]

Have you replaced your filters/aircleaners? Ano mileage mo?

yes sir, change fuel filter, air filter, oil filter with original toyota.

nag change oil narin ako. mileage is 130k.

pag running wala namang smoke. pero pag idle den apakan ang gas pedal upto 3 uusok ng white.

max speed sa highway 90 lang sagad na sa flooring apak.

could this be engine problem or fuel injector/pump?

engine sounds good naman..

[vvti2.0]

Paps, stupid question, will changing of fuel filter affect my fuel consumption? Say due for change na filter or cleaning, pwede ba tumaas FC kung di palitan or linisan?

[dr. d]

Paps, stupid question, will changing of fuel filter affect my fuel consumption? Say due for change na filter or cleaning, pwede ba tumaas FC kung di palitan or linisan?

Actually, it's not a stupid question.. If the filter is clogged and limiting fuel flow, replacing it will restore your fuel efficiency, higher or lower, whatever that was before the clogging. And it will also restore driving pleasure.. As in, pwede na namang umarangkada. My personal experience.. Nalimutan kong palitan ang filter ni diesel ko. Ayun.. Hina arangkada on the way home.Next morning, patay makina ten seconds after starting it.. But I did not notice fuel efficiency changes, maybe because everything happened so fast..

[Dieseldude]

yes sir, change fuel filter, air filter, oil filter with original toyota.

nag change oil narin ako. mileage is 130k.

pag running wala namang smoke. pero pag idle den apakan ang gas pedal upto 3 uusok ng white.

max speed sa highway 90 lang sagad na sa flooring apak.

could this be engine problem or fuel injector/pump?

engine sounds good naman..

I'm not sure about your problem. Does your car start easy in the morning? Does your engine discharge white smoke when cold, and does this decrease as your engine reaches normal operating temperature?

[Dieseldude]

Actually, it's not a stupid question.. If the filter is clogged and limiting fuel flow, replacing it will restore your fuel efficiency, higher or lower, whatever that was before the clogging. And it will also restore driving pleasure.. As in, pwede na namang umarangkada. My personal experience.. Nalimutan kong palitan ang filter ni diesel ko. Ayun.. Hina arangkada on the way home.Next morning, patay makina ten seconds after starting it.. But I did not notice fuel efficiency changes, maybe because everything happened so fast..

Dr D is right about the fuel filter. Failing to replace a blocked air filter will starve the engine of oxygen, an agent of combustion. This will result in low power, black smoke, and high fuel consumption.

[ParticleX]

Hi again DD,

Had my air and fuel filters replaced (yung air filter easy job lang, yung fuel filter ako rin sana gagawa kaso matigas at wala akong filter wrench so dinala ko sa mechanic). After replacing it at the shop, OK naman but nung nakauwi na ako and used the vehicle again eh it hesitates to startup (before I had the fuel filter replaced, one-click start palagi)

I was about to drop someone sa airport this early morning and naexperience ko ulit yung hesitation sa startup to the point of stalling (bumaba less than 500rpm) - suspect ko agad sa fuel filter job so tinabi ko muna then I primed the pump (diba dapat the pump should be rock-hard? pag prime ko malambot) then checked the hoses. Nagamit ko naman and pagkauwi ko I checked all the clamps and yung return line sa assembly ay maluwag na and yung screw thread is stripped so I did replaced that clamp and primed it again until hard and OK na ulit.

This afternoon chineck ko yung fuel primer kung matigas and surprisingly its not, so ini-start ko and may hesitation ulit (as far as I know may hangin ulit sa system right?), so plan ko na lang to replace all hoses and clamps. I assume hindi naman ito kamahalan? Also may nabasa ako na the injectors should be bled? Could you expound on this so I can tell my mechanic.

Many thanks

[Dieseldude]

This afternoon chineck ko yung fuel primer kung matigas and surprisingly its not, so ini-start ko and may hesitation ulit (as far as I know may hangin ulit sa system right?), so plan ko na lang to replace all hoses and clamps. I assume hindi naman ito kamahalan? Also may nabasa ako na the injectors should be bled? Could you expound on this so I can tell my mechanic.

Many thanks

You are right about checking hoses and clamps. Also, check orings on 3 locations: filter to top housing, water sensor at bottom part of filter, sealing gasket on air bleed screw located on to of filter housing.

[neil.corrigan12]

we should know the basics of the IC engines.
1. Spark ignition
2. Compression ignition
In spark ignition engines during compression stroke the petrol air mixture is compresed at 1: 8 ratio the temperature at the end of the stroke is only 50-60 centigrade. Hence to burn the petrol mixture a spark plug is used to ignite the fuel mixture.
But in compression ignition engines during compression stroke air is compressed to 1:17 ratio that means 17 parts of the air is compressed to 1 part and at the end of the compression stroke the temperature of the air is more than 200 centigrade. At this stage diesel fuel injected on the hot charge hence a power stroke is generated.

[DHomeyyzz]

Hi sir DieselDude,

We have a 2003 Pajero fieldmaster..Ang symptoms po ng ride namin is hard starting sya sa umaga and sabay it blows white smoke and rough idling. If i-pump yung fuel primer sa fuel filter gaganda andar nya maghapon. Kinabukasan ng umaga hard starting nanaman sya and we have to pump the fuel filter primer again, after than maganda na naman andar nya ulit. We last calibrated our injection pump Sept 2012. We also replaced Glow Plugs this month lang.

May nabasa din po pala ako sa internet esp. in Australia na pag hard starting with rough idling and white smoke ang 4m40 at pag pinump ang fuel filter primer at gaganda na ang andar nito ay baka raw Oil seal na ng injection pump ang may sira. Na sabi daw doon ay air is sipping into the pump at umaatras ung fuel pabalik ng Filter/tank. Duda nga ako sa huling nagcalibrate, kasi baka hindi maayos ang pagka-calibrate o hindi maganda ang pinalit na Oil seal/O-ring.

Nung binalik namin sa dating nagcalibrate at sinabi namin ang problema at symptoms ng sasakyan ay alam na raw nila kung ano ang gagawin. Ang sabi daw nila ay i-aadjust lang daw ang injection pump timing para daw hindi mahirapan kumuha ng diesel fuel. Nung na adjust na nila ang injection pump timing ay gumaspang naman ang andar, at kinabukasan nung pinaandar namin ng umaga ay ganun parin ang sakit nya .

Anyways yun lang po.. any advice from you sir can be very helpful po sa amin..

[ka_omeng]

Wala ako masyado alam sir sa ganyan, pero di kaya barado fue filter????

[DHomeyyzz]

Wala ako masyado alam sir sa ganyan, pero di kaya barado fue filter????

Nagpalit na po ng fuel filter 3 times na. pati peak pump na primer na nakalagay sa taas ng Fuel filter nagpalit na din.

[Dieseldude]

Hi again DD,

Had my air and fuel filters replaced (yung air filter easy job lang, yung fuel filter ako rin sana gagawa kaso matigas at wala akong filter wrench so dinala ko sa mechanic). After replacing it at the shop, OK naman but nung nakauwi na ako and used the vehicle again eh it hesitates to startup (before I had the fuel filter replaced, one-click start palagi)

I was about to drop someone sa airport this early morning and naexperience ko ulit yung hesitation sa startup to the point of stalling (bumaba less than 500rpm) - suspect ko agad sa fuel filter job so tinabi ko muna then I primed the pump (diba dapat the pump should be rock-hard? pag prime ko malambot) then checked the hoses. Nagamit ko naman and pagkauwi ko I checked all the clamps and yung return line sa assembly ay maluwag na and yung screw thread is stripped so I did replaced that clamp and primed it again until hard and OK na ulit.

This afternoon chineck ko yung fuel primer kung matigas and surprisingly its not, so ini-start ko and may hesitation ulit (as far as I know may hangin ulit sa system right?), so plan ko na lang to replace all hoses and clamps. I assume hindi naman ito kamahalan? Also may nabasa ako na the injectors should be bled? Could you expound on this so I can tell my mechanic.

Many thanks

I'm sorry for this very late reply. It is very possible that you could be pulling in air through faulty fuel hoses and clamps.

Regarding bleeding of injectors, you can do this if you suspect air in your system. You don't need to bleed air once you get your engine running.

[Dieseldude]

Hi sir DieselDude,

We have a 2003 Pajero fieldmaster..Ang symptoms po ng ride namin is hard starting sya sa umaga and sabay it blows white smoke and rough idling. If i-pump yung fuel primer sa fuel filter gaganda andar nya maghapon. Kinabukasan ng umaga hard starting nanaman sya and we have to pump the fuel filter primer again, after than maganda na naman andar nya ulit. We last calibrated our injection pump Sept 2012. We also replaced Glow Plugs this month lang.

May nabasa din po pala ako sa internet esp. in Australia na pag hard starting with rough idling and white smoke ang 4m40 at pag pinump ang fuel filter primer at gaganda na ang andar nito ay baka raw Oil seal na ng injection pump ang may sira. Na sabi daw doon ay air is sipping into the pump at umaatras ung fuel pabalik ng Filter/tank. Duda nga ako sa huling nagcalibrate, kasi baka hindi maayos ang pagka-calibrate o hindi maganda ang pinalit na Oil seal/O-ring.

Nung binalik namin sa dating nagcalibrate at sinabi namin ang problema at symptoms ng sasakyan ay alam na raw nila kung ano ang gagawin. Ang sabi daw nila ay i-aadjust lang daw ang injection pump timing para daw hindi mahirapan kumuha ng diesel fuel. Nung na adjust na nila ang injection pump timing ay gumaspang naman ang andar, at kinabukasan nung pinaandar namin ng umaga ay ganun parin ang sakit nya .

Anyways yun lang po.. any advice from you sir can be very helpful po sa amin..

Injection pump and possible glow plug failure ang problem mo.

[012512]

Dr D is right about the fuel filter. Failing to replace a blocked air filter will starve the engine of oxygen, an agent of combustion. This will result in low power, black smoke, and high fuel consumption.

Hi thanks... kaya pala malakas ang kain ng fuel dahil sa palitin na air filter.. kaya bang I-DIY yan sir? KIA CARENS ang sasakyan.