Diesel Fuel Injection System Help Desk

[Dieseldude]

2D Max...

Have your injection pump checked. I suspect that you have a damaged/worn out oil seal and/or drive shaft in your pump. What is happening is...oil coming out in front of your pump going to your timing gears and crankshaft thus increasing your oil level. When your oil becomes diluted, lubricity will deteriorate (it will not be sufficient to lubricste internal engine components) and can cause major engine failure. Better safe than sorry...so have it checked ASAP

[colt45]

DIESELDUDE,

i have a ISUZU pick-up LS '94 model. engine is 4JA1. my problem is that my oil level keeps on rising. last change oil, we just used 4.5 liters of oil, and it was in the maximum level. then after 2 weeks, it was 1 inch above the maximum level. now it's 2 inch above the maximum. i consulted a mechanic and said that the diesel fuel might be entering inside the engine, mixing with my engine oil. pls help on this matter. thanks..

Dude pareho tayo ng sasakyan, 96 nga lang sa akin. I had a problem like yours, oil level is rising. Dieseldude's analysis is right. I had mine repaired at betan. Seals inside the pump are wornout causing fuel to enter the timing gear case.

[rion]

Try to do it one thing at a time. First, measure your engine's performance at it's present condition. Then add the intercooler and check performance again. Then, do the wastegate adjustment if you really want, and measure again. ........ then injection timing. This way, you can really gauge if improvement was gained in each modification phase.

thanks dude, will do! that's also what I thought because I really don't want to touch anything in the engine yet. it's just a couple months newly installed. hindi pa nga na submit yung change engine papers sa LTO eh.

[adventure]

*DIESELDUDE
sir puwede po bang kabitan ng turbo booost gauge yung strada namin 4d56intercooler turbo and vacuum thank you po

[Dieseldude]

*DIESELDUDE
sir puwede po bang kabitan ng turbo booost gauge yung strada namin 4d56intercooler turbo and vacuum thank you po

Of course you can install a boost gauge. Ideal location is after the intercooler as this is the true pressure your engine is receiving. Boost pressure will be slightly higher before the intercooler than after the intercooler.

A compound gauge (vacuum & Pressure) would be good. Your intake system will be on a sight vacuum when you are at low speed/low load, and will indicate positive pressure as speed and load is increased. A high vacuum reading at high speed & load is a sure sign of a blocked air filter and/or intercooler.

Enjoy your modification,

Dieseldude

[adventure]

sir dieseldude
nagkakabit po ba kayo nung mga turbo boost and vacuum sa centraldiesel kasi malapit lang po yan sa school ko and magkano po kaya ang installation

[Dieseldude]

sir dieseldude
nagkakabit po ba kayo nung mga turbo boost and vacuum sa centraldiesel kasi malapit lang po yan sa school ko and magkano po kaya ang installation

Sorry, hindi kami nagkakabit ng boost gauge. Meron ka na ba compound gauge?

[Dieseldude]

Hi Tsikoters,

Sorry for sleeping on this thread.....I have been advised to keep this active. Was out of the country last week for commonrail training. For those who have sent private messages regarding their diesel fuel injection concerns...thank you, and I hope I have been of help to you. Hope to hear from some more of you again soon. Have a good day!!!

[judyang]

i change oil every 5ooo kms pero maitim pa rin usok. then, nagperehistro ako sa lto, pinabomba ng tubig ang tambutso para pumasa raw sa emission test. ok lang ba yun?

[Dieseldude]

i change oil every 5ooo kms pero maitim pa rin usok. then, nagperehistro ako sa lto, pinabomba ng tubig ang tambutso para pumasa raw sa emission test. ok lang ba yun?

Ok din yun, but your problem still exists. Next step you should take is to check your aircleaner, this could be clogged/restricted. A simple test is for you to run your engine for a while without the aircleaner, and see if the black smoke disappears after a while. If it does. just replace it. I highly recommend that if you do replace, use ORIGINAL brand fit for your vehicle. If that does not solve your problem, you might have to take down your injection pump and injectors for calibration.

[frt]

My ride is a diesel pajero 4D56 TCI, the device/magnet that closes and opens diesel fuel line to flow into the fuel injection seems to be not working. What i do is tap a wire attached to the positive terminal of the batt to the screw itself (removing the rubber insulation) to get it to open.
Question is, how do i know if its the device thats faulty or there's a problem in my ingnition system?

[Dieseldude]

My ride is a diesel pajero 4D56 TCI, the device/magnet that closes and opens diesel fuel line to flow into the fuel injection seems to be not working. What i do is tap a wire attached to the positive terminal of the batt to the screw itself (removing the rubber insulation) to get it to open.
Question is, how do i know if its the device thats faulty or there's a problem in my ingnition system?

If your Pajero starts with the jumper wire attached, it just confirms that the magnet valve is OK, and that no voltage is applied to the valve through the ignition switch. You may have to check your ignition system.

Magnet valve test: Temporarily disconnect wire from the magnet valve. Do a resistance check between magnet valve terminal and ground (pump housing). You should get a resistance reading of 8 ohms +/- 1.1 ohm.

Ignition system test: Measure voltage at the magnet valve terminal and ground (pump housing) You should get the following readings:
Ignition switch off: 0 V
Ignition on: Battery voltage (approx. 12.5 V)
Ignition at start position, engine cranking: approx. 10 V
Ignition on, engine running: Battery voltage (approx. 12.5 V)

Happy hunting,

Dieseldude

[truckster]

sir dieseldude, i have several questions?
1. do you have a calibration shop or can you recommend one?
2. i have a 97 fuego ls. its idling is erratic. it starts with one click still but after a while of driving or when i get stuck in traffic, the idling goes down and shaky. furthermore, if the accelerator cable stopper is set too high, the idling sticks and would not go down even if you take your foot of the gas pedal?
i think there's something wrong with the injection pump and would like some initial info on what might be causing it.
thanks

[nugundam93]

i have a question too...

on light and moderate throttle, i can accelerate just fine, a bit slow lang nga coz light throttle lang, and i get a positive reading sa boost gauge.

when i floor it to overtake (matic kasi, 4m40) or when the tranny decides to downshift, without changing how i step on the accelerator, i immediately get a lot of black smoke, almost no pull from the engine, and either zero or negative on the boost gauge.

now i read in one of the posts back that it might be a blocked air filter. i also asked the guys at central diesel, and aside from the air filter, they said it could also be the fuel filter.

i did notice that a looking while back up to the present, i was consistently getting less boost, from around 14psi to about 5psi max lately. could those filters be the problem, or is the wastegate also having a problem? thanks!

[JagXtrm]

may possibility na may singaw yung mga hoses from turbo going to IC to engine.

[Dieseldude]

sir dieseldude, i have several questions?
1. do you have a calibration shop or can you recommend one?
2. i have a 97 fuego ls. its idling is erratic. it starts with one click still but after a while of driving or when i get stuck in traffic, the idling goes down and shaky. furthermore, if the accelerator cable stopper is set too high, the idling sticks and would not go down even if you take your foot of the gas pedal?
i think there's something wrong with the injection pump and would like some initial info on what might be causing it.
thanks

1. We are a diesel injection service shop.
2. Yes, it seems to be an injection pump problem. Your pump may have to be checkes as it is been in service for 10 years now.

[Dieseldude]

i have a question too...

on light and moderate throttle, i can accelerate just fine, a bit slow lang nga coz light throttle lang, and i get a positive reading sa boost gauge.

when i floor it to overtake (matic kasi, 4m40) or when the tranny decides to downshift, without changing how i step on the accelerator, i immediately get a lot of black smoke, almost no pull from the engine, and either zero or negative on the boost gauge.

now i read in one of the posts back that it might be a blocked air filter. i also asked the guys at central diesel, and aside from the air filter, they said it could also be the fuel filter.

i did notice that a looking while back up to the present, i was consistently getting less boost, from around 14psi to about 5psi max lately. could those filters be the problem, or is the wastegate also having a problem? thanks!

1. Try replacing your air filter element with an original Mitsubishi air filter.
2. Intercooler may be blocked with oil from your blow-by hose.
3. Your air intake hose betwwen the intercooler and engine could be collapsing. YOur engine pulls in more air as you rev it up. A blocked intercooler would cause your intake hose to collpase.

[nugundam93]

thanks sir!

[truckster]

1. We are a diesel injection service shop.
2. Yes, it seems to be an injection pump problem. Your pump may have to be checkes as it is been in service for 10 years now.

thanks for the response sir
it begs the question sir
what is the name of your shop and where is it located?
im sure i could look around the forum to hunt for info on your shop, but i thought i'd ask anyway.
it would be greatly appreciated if you could respond
thanks more power
btw sir, a shop told me it might be the governor of the injection pump, might he be correct sir?
thanks again

[warrior]

Diseldude,

Sir, i drive a 1997 starex with a non turbo engine. It logged more than a 100k kms already. Regularly change oil, oil filter, fuel filter and air cleaner. So far engine is still ok runs smooth and still no substantial smoke.
Sa akin kasi as long as walang problem with the injection pump, do'nt touch it. Is this right? Also my mechanic whenever he change the fuel filter he also bleeds the fuel lines going to the cylender, yung apat apart from the fuel filter. Is this better?

Thanks and more power