Diesel Fuel Injection System Help Desk

[erick_214]

sir...
tanong ko lang sana kung ok pa yung engine ng Hi-ace(japanese 2nd hand 1KZ-TE engine)) ko...

ang nangyari kasi pauwe kame kahapon galing sa Ilocos going to manila may nadaan ako na malaking bato hindi ko alam kung sinong hudas ang naglagay nun doon...ang nangyari ay tinamaan yung water line papunta ng heater...ngayong tumutulo yung tubig(itibabi ko agad para makita kung anuman ang naging problem ng sasakyan) kaya ang ginawa ko ay sinarado ko yung line tapos nagdagdag ako ng tubig sa radiator(about 4liters) then takbo ako from la union onwards(going home) about 30 mins tapos huminto ako sa may gasoline station...

check ko yung tubig at pagbukas ko nun radiator cap ay bumulwak yung tubig(sa init siguro ng makina pero nakikita ko yung temp guage ko nasa normal pa rin)...nabahala ako kasi alam ko na hindi normal yung ganun kaya nagtanong ako ng mekaniko sa gasoline station...

ang ginawa ng mekaniko ay nilagyan ng hose na pangtubig muna yung broken line para mag-circulate ulet yung water, temporary yung ginawa niya...tinanong ko siya kung may damage kaya sa engine ang sabi niya ay may konting damage na raw sa cylinder head gasket kasi raw nag-overheat...

1) ngayon...totoo kaya na may tama na yung cylinder head gasket ng engine ko?
2) nakita ko na may tama yung lower suspension at yung kinakabitan ng caster arm at sabi ng mekaniko ay kailangan na raw palitan yung lower susupension...totoo ba ito???

pasensya na po kayo sa mahaba kong inquiry huh...maraming salamat po sana ay matulungan nyo ako...

[Dieseldude]

sir...
tanong ko lang sana kung ok pa yung engine ng Hi-ace(japanese 2nd hand 1KZ-TE engine)) ko...

...ang nangyari ay tinamaan yung water line papunta ng heater... tumulo yung tubig,....kaya ang ginawa ko ay nagdagdag ako ng tibig,...then takbo ako from la union onwards.... about 30 mins tapos huminto ako sa may gasoline station...

check ko yung tubig at pagbukas ko nun radiator cap ay bumulwak yung tubig (sa init siguro ng makina pero nakikita ko yung temp guage ko nasa normal pa rin)... nabahala ako kasi alam ko na hindi normal yung ganun kaya nagtanong ako ng mekaniko sa gasoline station... Talagang nag overheat ka. Pero normal yung temp indication dahil mababa na ang coolant level mo. Hindi nakita ng temp sensor ang true temperature dahil hindi na ito nakatutok sa coolant. Steam nalang ang nakita nya. Hindi magandang temperature conductor ang steam.

ang ginawa ng mekaniko ay nilagyan ng hose na pangtubig muna yung broken line para mag-circulate ulet yung water, temporary yung ginawa niya...tinanong ko siya kung may damage kaya sa engine ang sabi niya ay may konting damage na raw sa cylinder head gasket kasi raw nag-overheat... Pwedeng meron damage, or pwede rin wala. Depende ito kung gaano kataas inabot ang temp, at kung gaano katagal. Masama kung tumigil ang makina nang sarili, na hindi mo pa ito pinapatay sa susian. Kung ganito ang nangyari, sobra na ang thermal expansion ng pistons at sumikip na sila sa liners. Kumayod na ang pistons sa liners. Hindi sana.

1) ngayon...totoo kaya na may tama na yung cylinder head gasket ng engine ko? Malalaman mo yan kung bumubulwak ang coolant. Mag lea-leak ang compression gasses papunta sa cooling system. Dadaan ito sa damaged cylinder head gasket.....
2) nakita ko na may tama yung lower suspension at yung kinakabitan ng caster arm at sabi ng mekaniko ay kailangan na raw palitan yung lower susupension...totoo ba ito??? Madali malaman ito, silipin mo nang mabuti ang pangilalim...

pasensya na po kayo sa mahaba kong inquiry huh...maraming salamat po sana ay matulungan nyo ako... YOU ARE WELCOME....HAPPY EASTER, GODBLESS

[erick_214]

sir...
tanong ko lang sana kung ok pa yung engine ng Hi-ace(japanese 2nd hand 1KZ-TE engine)) ko...

...ang nangyari ay tinamaan yung water line papunta ng heater... tumulo yung tubig,....kaya ang ginawa ko ay nagdagdag ako ng tibig,...then takbo ako from la union onwards.... about 30 mins tapos huminto ako sa may gasoline station...

check ko yung tubig at pagbukas ko nun radiator cap ay bumulwak yung tubig (sa init siguro ng makina pero nakikita ko yung temp guage ko nasa normal pa rin)... nabahala ako kasi alam ko na hindi normal yung ganun kaya nagtanong ako ng mekaniko sa gasoline station... Talagang nag overheat ka. Pero normal yung temp indication dahil mababa na ang coolant level mo. Hindi nakita ng temp sensor ang true temperature dahil hindi na ito nakatutok sa coolant. Steam nalang ang nakita nya. Hindi magandang temperature conductor ang steam. (sir,,,about doon sa mababa yung coolant level parang hindi naman kasi nilagyan ko naman ulet ng tubig at pinuno yung radiator...)

ang ginawa ng mekaniko ay nilagyan ng hose na pangtubig muna yung broken line para mag-circulate ulet yung water, temporary yung ginawa niya...tinanong ko siya kung may damage kaya sa engine ang sabi niya ay may konting damage na raw sa cylinder head gasket kasi raw nag-overheat... Pwedeng meron damage, or pwede rin wala. Depende ito kung gaano kataas inabot ang temp, at kung gaano katagal. Masama kung tumigil ang makina nang sarili, na hindi mo pa ito pinapatay sa susian. Kung ganito ang nangyari, sobra na ang thermal expansion ng pistons at sumikip na sila sa liners. Kumayod na ang pistons sa liners. Hindi sana.

1) ngayon...totoo kaya na may tama na yung cylinder head gasket ng engine ko? Malalaman mo yan kung bumubulwak ang coolant. Mag lea-leak ang compression gasses papunta sa cooling system. Dadaan ito sa damaged cylinder head gasket.....(paano ko ba matetesting kung nasira nga talaga yung cylinder head gasket??? kasi kanina tinidnan ko ulet pag nakaminor wala namang motion yung tubig sa may radiator cap,,,pag nirev ko ayun gumagalaw,,,normal lang ba yung ganun pag nirev mo kasi diba aandar yung water pump nun???)
2) nakita ko na may tama yung lower suspension at yung kinakabitan ng caster arm at sabi ng mekaniko ay kailangan na raw palitan yung lower susupension...totoo ba ito??? Madali malaman ito, silipin mo nang mabuti ang pangilalim... (ayun pinacheck up ko nga sa gumagawa ng suspension may tama nga at kailangan palitan yung lower suspension tapos yung cross member na nakawelding sa body ay kailangan daw painitan at idederetso at papalitan yung lower suspension...totoo ba talaga ito???)

pasensya na po kayo sa mahaba kong inquiry huh...maraming salamat po sana ay matulungan nyo ako... YOU ARE WELCOME....HAPPY EASTER, GODBLESS

PS. yung kasing hose na nasira ay yung papunta sa heater,,,ganun ba kaimportante yun???pwede ba i-bypass na lang yung heater???

marami pong salamat ulet...

[Dieseldude]

PS. yung kasing hose na nasira ay yung papunta sa heater,,,ganun ba kaimportante yun???pwede ba i-bypass na lang yung heater???

marami pong salamat ulet...

Pwede. Plug up mo yung supply and return hoses.

[aremvy]

mga boss at sir,

i need your help. i'm now in a situation wherein nakababa na yung old crack cylinder head nung sasakyan at nakabili na ako ng new replacement cylinder head. the problem is, yung mekaniko na originally gumagawa nung sasakyan di na sumulpot. i've tried calling and texting him but haven't got any reply.

can you please recommend a good and honest toyota revo diesel engine mechanic that has tools and willing to go at my place and can install the new cylinder head.

my exact address is e. rodriguez st. malibay, pasay city. (in between philtranco and evangelista, just few meters away lang po sa edsa)

exact make of the car: 2004 toyota revo sport runner (diesel)

thanks in advance!

[promdiboy]

sir dieseldude, could you share your knowledge about commonrail fuel injection, I just installed a plug and play gizmo that connects to the fuel rail sensor. and this gizmo is supposed to extract more power from the engine. it claims that it will not increase the pressure but just add more fuel.

My question is do you see any problems that could arise from my modification. One thing I observed that im very happy with is after I installed the gizmo is its less noisy than before. its for a mitsubishi 4m41 commonrail engine,

[Dieseldude]

sir dieseldude, could you share your knowledge about commonrail fuel injection, I just installed a plug and play gizmo that connects to the fuel rail sensor. and this gizmo is supposed to extract more power from the engine. it claims that it will not increase the pressure but just add more fuel. Since your gizmo is wired to the rail pressure sensor, it probably alters the pressure signal to the ECU, fooling the ECU that rail prssure is lower than required. The ECU compensates either by increasing fuel pressure or by increasing injector metering time.

My question is do you see any problems that could arise from my modification. Yes, more fuel = more power, but with higher combustion pressures and heat. Another thing, your vehicle warranty may be void if Mitubishi sees this.

One thing I observed that im very happy with is after I installed the gizmo is its less noisy than before. its for a mitsubishi 4m41 commonrail engine, I'm glad you're happy with this device.

[promdiboy]

thanks sir dieseldude for your reply .

[Dieseldude]

thanks sir dieseldude for your reply .

You're welcome.


Fyi, this gizmo may not cause any significant harm to your engine. Automotive applications engines mostly operate at idle or part throttle while cruising. It is rare that the accelerator pedal is floored for extended durations. Your gizmo functions very briefly during acceleration, and this is a nice feeling... good engine response. Gizmo can however operate continuously when car is fully loaded during long uphill climbs.

[terano]

I have a Nissan Terrano TD27 Turbo

Medyo hina hatak and mausok

I went to a calibration center

Calibrated then linis yung Nozzles - Tangal usok

Pero humina hatak, todo na apak sa pedal pero hangang 75-80 nlng spped unlike before napaptakbo ko ng 130 km/h sa hiway

Adjust adjust, then may pagkakataon naman na parang pigil makina

Ngayon medyo ok naman ung takbo after ilan days ng adjustment at pabalik balik

Problem ko naman ngayon may naririnig akon tok pg apak ko sa pedal and when it reaches the 2.5K rpm mark, may tok so di ko na pinapaabot ng 2.5 rpm pataas.. Dati naman wala to

Could it be the calibration? The timing in the calibration?

Please help

Ayaw ko na kasi ibalik doon e, almost one wekk na ko pabalik balik. Hanap na lng ako ibang gagawa pero please i need your opinion first.

Ayaw ko naman kasi tangapin na kumatok na bigla makina ng Terrano ko, dati naman hindi ganito, nung nagpacalibrate ako, may tunog na


Please help kung ano dapat gawin and Thanks

[Dieseldude]

Hindi authorized diesel workshop ang nag repair ng diesel injection system mo kaya pabalik-balik ka. Sorry about this, pero yan ang totoo. Malamang, walang calibration specs yung gumawa ng system mo. Complete sa test specs ang mga authorized workshops kaya walang guesswork ang trabaho.

Sugggestion ko ay:

1. check/correct injection timing, replace air and fuel filters.
2. Kung hindi mag-improve, pa-repair mo ulit ang injection pump and injectors sa authorized diesel workshop; pero doble gastos ka na nyan.

[erick_214]

tol...may alam ka ba na authorized diesel workshop na malapit sa marikina..?
TIA...

[Dieseldude]

tol...may alam ka ba na authorized diesel workshop na malapit sa marikina..?
TIA...

None in Marikina. Listed below are authorized Bosch/Zexel workshops in Metro Manila:

1. Central Diesel, Quezon Ave. Quezon City Tel: 411-3711 to 13
2. Betan, Makati, see yellow pages
3. Malabon Diesel, Dagat-Dagatan Navotas. see yellow pages

[terano]

Hindi authorized diesel workshop ang nag repair ng diesel injection system mo kaya pabalik-balik ka. Sorry about this, pero yan ang totoo. Malamang, walang calibration specs yung gumawa ng system mo. Complete sa test specs ang mga authorized workshops kaya walang guesswork ang trabaho.

Sugggestion ko ay:

1. check/correct injection timing, replace air and fuel filters.
2. Kung hindi mag-improve, pa-repair mo ulit ang injection pump and injectors sa authorized diesel workshop; pero doble gastos ka na nyan.

sir, followed your advice

went to a zexel calibration center

binaba ulit, and was calibrated according to my injection pump and td27 engine specs

after calibration, assembled then refitted back

Yung unang test run, ayaw mag 2nd gear.

They manually adjusted the potentiometer ( ung electrical component on top of my engine pump)

Then ok, nag shift na and it ran smoothly including the shifting, almost perfect i would say. When reaching the 60 kph - turbo all the way na. Tried the Sumulong hiway uproad - no problem unlike before


THen the following morning, i tested my terrano again, To my amazement, it would not shift to 2nd gear again. I have to go to the engine bay area and manually rev the engine to around 2,500 - 3,000 rpm. Then i go back to the driver's seat, drive the terrano and ok na yung shifting

Problem is, when i switch off the terrano and park the it, when i come back to drive the car again, it wouldnt shift until i repeat what i did, that is revving the terrano manually then going back to the drivers seat then run the terrano, and thats the time the terrano will run and all transmision engaged properly

Mali po ba setting ng Potentiometer nito? Or ano kaya possble problems sir?

I will come back tomorrow to have it done again. Hopefully the problem will be solved.

This is the first tie i encounter this kind of problem with my Terrano.

Thanks for previous reply and reccomendations.

[terano]

Hindi authorized diesel workshop ang nag repair ng diesel injection system mo kaya pabalik-balik ka. Sorry about this, pero yan ang totoo. Malamang, walang calibration specs yung gumawa ng system mo. Complete sa test specs ang mga authorized workshops kaya walang guesswork ang trabaho.

Sugggestion ko ay:

1. check/correct injection timing, replace air and fuel filters.
2. Kung hindi mag-improve, pa-repair mo ulit ang injection pump and injectors sa authorized diesel workshop; pero doble gastos ka na nyan.

sir, followed your advice

went to a zexel calibration center

binaba ulit, and was calibrated according to my injection pump and td27 engine specs

after calibration, assembled then refitted back

Yung unang test run, ayaw mag 2nd gear.

They manually adjusted the potentiometer ( ung electrical component on top of my engine pump)

Then ok, nag shift na and it ran smoothly including the shifting, almost perfect i would say. When reaching the 60 kph - turbo all the way na. Tried the Sumulong hiway uproad - no problem unlike before


THen the following morning, i tested my terrano again, To my amazement, it would not shift to 2nd gear again. I have to go to the engine bay area and manually rev the engine to around 2,500 - 3,000 rpm. Then i go back to the driver's seat, drive the terrano and ok na yung shifting

Problem is, when i switch off the terrano and park the it, when i come back to drive the car again, it wouldnt shift until i repeat what i did, that is revving the terrano manually then going back to the drivers seat then run the terrano, and thats the time the terrano will run and all transmision engaged properly

Mali po ba setting ng Potentiometer nito? Or ano kaya possble problems sir?

I will come back tomorrow to have it done again. Hopefully the problem will be solved.

This is the first tie i encounter this kind of problem with my Terrano.

Thanks for previous reply and reccomendations.

[terano]

Hindi authorized diesel workshop ang nag repair ng diesel injection system mo kaya pabalik-balik ka. Sorry about this, pero yan ang totoo. Malamang, walang calibration specs yung gumawa ng system mo. Complete sa test specs ang mga authorized workshops kaya walang guesswork ang trabaho.

Sugggestion ko ay:

1. check/correct injection timing, replace air and fuel filters.
2. Kung hindi mag-improve, pa-repair mo ulit ang injection pump and injectors sa authorized diesel workshop; pero doble gastos ka na nyan.

sir, followed your advice

went to a zexel calibration center

binaba ulit, and was calibrated according to my injection pump and td27 engine specs

after calibration, assembled then refitted back

Yung unang test run, ayaw mag 2nd gear.

They manually adjusted the potentiometer ( ung electrical component on top of my engine pump)

Then ok, nag shift na and it ran smoothly including the shifting, almost perfect i would say. When reaching the 60 kph - turbo all the way na. Tried the Sumulong hiway uproad - no problem unlike before


THen the following morning, i tested my terrano again, To my amazement, it would not shift to 2nd gear again. I have to go to the engine bay area and manually rev the engine to around 2,500 - 3,000 rpm. Then i go back to the driver's seat, drive the terrano and ok na yung shifting

Problem is, when i switch off the terrano and park the it, when i come back to drive the car again, it wouldnt shift until i repeat what i did, that is revving the terrano manually then going back to the drivers seat then run the terrano, and thats the time the terrano will run and all transmision engaged properly

Mali po ba setting ng Potentiometer nito? Or ano kaya possble problems sir?

I will come back tomorrow to have it done again. Hopefully the problem will be solved.

This is the first tie i encounter this kind of problem with my Terrano.

Thanks for previous reply and reccomendations.

[Dieseldude]

The potentiometer on top of the pump may have a poor contact to the harness, or the potentiometer could be malfunctioning.

Ask them to recheck this as this controls transmission shifting.

[batosai]

The potentiometer on top of the pump may have a poor contact to the harness, or the potentiometer could be malfunctioning.

Ask them to recheck this as this controls transmission shifting.

Hi Dieseldude,

Are all diesel AT cars equip with this kind of potentioneter or it also depends on the injection pump model?

Thanks

[rna800]

I have a 1998 Mazda B2500 that has clocked more than 211,000 kms already.

My first question is before I had my 210k+ PMS, I started to hear a kinda weird and loud rattling/clunking like sound in the engine bay. At first I thought it was the flexible so I went to the shop where I had it replaced with a brand new one. They said that my flexible is still good and no signs of wear and tear and they think the sound is coming from the engine. When I brought it to my trusted shop for PMS, I told it my trusted mechanic and he said that by the sound, it needs calibration. I just don't remember the part that he said that needs to be calibrated, but it sounds like "injection" something. He also added that the car will not stall but the longer it takes, the louder it would become. More 1k+ kms after, it's still there and yah, I think it's getting louder but the duration of the sound is the same, I guess.

That sound appears 10 to 15 seconds every time I start the car, most especially when turning the aircon on and after that, I will not hear until the next start up. The sound is like a worn out or about to wear out flexible. There are times that it wouldn't make that sound.

For my second query, at the bottom of the passenger side, I noticed that something is leaking since it is making this circle wet marking. At first I thought it was just water dripping from the bed but it left a stain and everyday that same parking spot, it has wet marking. I tried to smell it and it's has a mild gas smell. From the naked eye, I didn't see any leaks.

The third inquiry is at an uphill, I could feel that it is somewhat having a hard time going up. I don't know if I am just used to the common rail engine but really, I have to rev up to more than 3000 rpm just for it to go up.

On flat roads, once it gets its momentum, I don't have any problems with it. The only thing is once it gets to 80 kph, it takes a very long time to get to 100 kph and even longer time to get to 120 kph and once it reaches 120 kph, that's it, it couldn't go any faster.

I have just replaced my fuel filter with an original one from Ford about 5,000+ kms ago and it has pump. Air filter, I haven't replaced it since but a lot of mechanics told me that it's still good and it doesn't need replacement yet.

I just wanna know what's your stand on my questions especially on the 1st and 2nd questions. Thanks!

[Dieseldude]

Hi Dieseldude,

Are all diesel AT cars equip with this kind of potentioneter or it also depends on the injection pump model?

Thanks

Not all A/T diesels have this potentiometer.

When installed, it is often used either for A/T shift control, or EGR control.