Diesel Fuel Injection System Help Desk

[benedict canlas]

masyado complicated and diesel ngayon kesa sa gasoline engine

[alrorskyz]

masyado complicated and diesel ngayon kesa sa gasoline engine

Depende cguro kasi si mazda may istop, mas complicated i think kaysa crdi

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[jakewise]

I would like to seek advise to whoever is knowledgeable here. I have a 4JG2 1997 local trooper. My concern is sometimes it starts with a very low idle in the morning and at times okay naman. But when you run the car, wala naman problem and so I ruled out injection pump problem. The mechanic said that the flapper valve located sa feed pump needs to be changed as he numerously adjusted it already, minsan it turns out okay then after a few days, the symptoms appear. He also mentioned that this is the reason why bumababa daw and diesel fuel because of the valve, thus minsan idle is low. I already had the fuel tank cleaned, fuel filter replaced. I am trying to look where I can buy this flapper valve which is color silver and looks like to be made of aluminum found in the feed pump but have no luck. Can anyone give a suggestion where I can purchase one or maybe diagnose if the mechanic also made the right diagnosis in case you also experienced something like it, thanks.

[the_expert]

I would like to seek advise to whoever is knowledgeable here. I have a 4JG2 1997 local trooper. My concern is sometimes it starts with a very low idle in the morning and at times okay naman. But when you run the car, wala naman problem and so I ruled out injection pump problem. The mechanic said that the flapper valve located sa feed pump needs to be changed as he numerously adjusted it already, minsan it turns out okay then after a few days, the symptoms appear. He also mentioned that this is the reason why bumababa daw and diesel fuel because of the valve, thus minsan idle is low. I already had the fuel tank cleaned, fuel filter replaced. I am trying to look where I can buy this flapper valve which is color silver and looks like to be made of aluminum found in the feed pump but have no luck. Can anyone give a suggestion where I can purchase one or maybe diagnose if the mechanic also made the right diagnosis in case you also experienced something like it, thanks.

Hi,

it sounds like a test is already done in finding air-lock in the external part of fuel system or removing a clogging dirt in the main line. Going to find fault in the internal parts of injection pump, I would suggest you to visit CENTRAL DIESEL along Quezon Avenue and you can talk to Jason. There is a need of expertise if you want the injection pump to be diagnosed. The feed pump problem could be a good guessing however it needs to verify other internal parts that could be a true cause of intermittent low idle.

CENTRAL DIESEL is a BOSCH authorized service center and I believe that the company is able to see the maker and model of your injection pump on 4JG2 before they set the right components for further analysis.

It is true that not all repair work can be a successful one but you should try to ask them to get knowledgeable info at first.

[jakewise]

Thanks for that info. However, I am located here in the province and it is not possible for me to visit Central Diesel


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[ryanisler]

Posting from the other thread...

Car is a 2009 Kia Carnival 2.9 CRDI.

Question sirs: on the drive pansin ko na biglang tumaas yung idle speed from 800 rpm to 1k rpm. When stepping on the brake it goes back to 800 (whether in gear or neutral). Mejo weird, pag naka preno ka 800 ang idle pero pag bibitawan yung brake aakyat sa 1k. All conditions yun kahit naka neutral and stopped or in drive and coasting.

Ang nangyari lang is kinailangan ma stencil yung engine number so para ma sikwat, inangat yung parang crossbar na humahawak sa hood latch saka nag stabilize ng fans. Tapos pansin ko na i parada sya ng naiwan sa neutral instead of park so nai start ko sya ng nka neutral.

Parang feeling ko may na tabig na plug or something sa kaka dukot nila. Any other suggestions or theories?

Thanks!

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[ryanisler]

Update on this: I took a look under the hood and true to suspicion, I saw 3 unplugged wires (looks like the socket got crushed or something) Since the male part of the plastic socket was either broken off or crushed, I just plugged each of the wires into their corresponding female connectors and wrapped them in electrical tape.

I started the car, and it idled at 1k still for about 10-12mins then idle speed dropped to its normal 800 rpm. I drove it around for a little bit and everything seem to be back to normal.

Thanks!

Posting from the other thread...

Car is a 2009 Kia Carnival 2.9 CRDI.

Question sirs: on the drive pansin ko na biglang tumaas yung idle speed from 800 rpm to 1k rpm. When stepping on the brake it goes back to 800 (whether in gear or neutral). Mejo weird, pag naka preno ka 800 ang idle pero pag bibitawan yung brake aakyat sa 1k. All conditions yun kahit naka neutral and stopped or in drive and coasting.

Ang nangyari lang is kinailangan ma stencil yung engine number so para ma sikwat, inangat yung parang crossbar na humahawak sa hood latch saka nag stabilize ng fans. Tapos pansin ko na i parada sya ng naiwan sa neutral instead of park so nai start ko sya ng nka neutral.

Parang feeling ko may na tabig na plug or something sa kaka dukot nila. Any other suggestions or theories?

Thanks!

[StockEngine]

dahil lng sa stencil? who did the stencil?

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[ryanisler]

Mga tambay sa likod ng LTO east ave. Kept telling them to jack the car up tapos kunin na lang sa ilalim pero kaya naman daw... ayun...



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[yapoy86]

Mga tambay sa likod ng LTO east ave. Kept telling them to jack the car up tapos kunin na lang sa ilalim pero kaya naman daw... ayun...



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Mahirap talaga mag stencil dyan sa carnival.. i assume its still the J3 engine.. sobrang sikip at ipit sa loob yung location ng engine number.. have that socket replaced baka mag short

[Dieseldude]

Hi,

it sounds like a test is already done in finding air-lock in the external part of fuel system or removing a clogging dirt in the main line. Going to find fault in the internal parts of injection pump, I would suggest you to visit CENTRAL DIESEL along Quezon Avenue and you can talk to Jason. There is a need of expertise if you want the injection pump to be diagnosed. The feed pump problem could be a good guessing however it needs to verify other internal parts that could be a true cause of intermittent low idle.

CENTRAL DIESEL is a BOSCH authorized service center and I believe that the company is able to see the maker and model of your injection pump on 4JG2 before they set the right components for further analysis.

It is true that not all repair work can be a successful one but you should try to ask them to get knowledgeable info at first.

The_Expert could be right about your pump pulling in air. Disconnect the injection pump's fuel return hose and immerse the hose tip in diesel fuel. If you see air bubbles, this is a sign that your injection pump is pulling in air.

The flapper valve only works when you manually stroke the feed pump. This is not the cause of your idling problems. You cannot buy this separately. It is part of the filter head.

[jakewise]

Thanks for your inputs. However, we initially installed another fuel filter from the tank before the main fuel filter and it seemed to have solve the problem so far.

The_Expert could be right about your pump pulling in air. Disconnect the injection pump's fuel return hose and immerse the hose tip in diesel fuel. If you see air bubbles, this is a sign that your injection pump is pulling in air.

The flapper valve only works when you manually stroke the feed pump. This is not the cause of your idling problems. You cannot buy this separately. It is part of the filter head.

[RustyXIII]

My 2006 Adventure's fuel consumption went from ~10Km/L down to +8Km/L. Same route, same conditions. Maintenance items like oil, oil filter, air filter, fuel filter are on schedule. No tappet noise so no reason to suspect valve clearance.
Got the vehicle used with ~50KKms, mileage now is at 133KKms and no calibration done yet. No reason to suspect IP issues as it is still one click start even in cold mornings. Also no excessive smoke and can still reach 120 Km/H when floored.
What's left to check, nozzle tips? Are these replaced without doing IP calibration? Around how much for parts and labor if indeed tips need servicing?

[Gian Paulo]

My 2006 Adventure's fuel consumption went from ~10Km/L down to +8Km/L. Same route, same conditions. Maintenance items like oil, oil filter, air filter, fuel filter are on schedule. No tappet noise so no reason to suspect valve clearance.
Got the vehicle used with ~50KKms, mileage now is at 133KKms and no calibration done yet. No reason to suspect IP issues as it is still one click start even in cold mornings. Also no excessive smoke and can still reach 120 Km/H when floored.
What's left to check, nozzle tips? Are these replaced without doing IP calibration? Around how much for parts and labor if indeed tips need servicing?

Yung apat na injector nozzle, Bosch Zexel and brand *P600 each labor nasa 400 to 600 bili ka lang sa Mitsubishi dealer like ATCO, MitsuPrime etc.

[Man of Cheap]

Yung apat na injector nozzle, Bosch Zexel and brand *P600 each labor nasa 400 to 600 bili ka lang sa Mitsubishi dealer like ATCO, MitsuPrime etc.

Hello Sir my car is Isuzu Crosswind 2014, turbo, MT. Usually how long do I have to wait before having my injector nozzle cleaned or replaced.

Thanks.

[ISO4113]

Hello Sir my car is Isuzu Crosswind 2014, turbo, MT. Usually how long do I have to wait before having my injector nozzle cleaned or replaced.

Thanks.

MoC,

Injectors are usually cleaned or replaced if you experience a misfire or if there is visible smoke in your exhaust. Regarding your crosswind, may reklamo ka ba sa performance ng kotse mo?

Regards,

ISO4113

[Mark88yap]

Good questions.

Hi boss.. simple question..
How would you know if the delivery screw is on its stock position or on its original position.. 4jb1tc thanks in advance. You can also email me at antonraf23*gmail.com

[Jawe]

New hereeeeeeee

[Jawe]

Hard starting siya at sa start may white na usok. kahit mainit pa ang makina minsan ayaw mag start nahihirapan. starting lang naman ang problema pag nakaandar na at tumatakbo maganda naman ang takbo. minsan may pinuntahan kami pinatay tas after 20 mins instart hanggang redundo lang. ano kaya problema nito mga boss?

[maxpedition]

Hard starting siya at sa start may white na usok. kahit mainit pa ang makina minsan ayaw mag start nahihirapan. starting lang naman ang problema pag nakaandar na at tumatakbo maganda naman ang takbo. minsan may pinuntahan kami pinatay tas after 20 mins instart hanggang redundo lang. ano kaya problema nito mga boss?

Baka battery mo? O pacheck mo alternator mo

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