Diesel Fuel Injection System Help Desk

[Dieseldude]

My ride is a 2008 Crosswind manual. Problem is it jerks whenever it reached 2k rpm on any gear whether on flat or uphill road, even at 5th gear it's still jerks a lot as if fuel is not being delivered normally on the engine. It could not reach 80 kph because of the jerking. What do you think the cause of this. This could be due to a blocked fuel filter.

It just had been 40k pms serviced. Did you replace the fuel filter during 40k pms?

thanks... Is there unusual smoke when jerking at 2000 rpm?

[kaloy228]

My ride is a 2008 Crosswind manual. Problem is it jerks whenever it reached 2k rpm on any gear whether on flat or uphill road, even at 5th gear it's still jerks a lot as if fuel is not being delivered normally on the engine. It could not reach 80 kph because of the jerking. What do you think the cause of this. This could be due to a blocked fuel filter.

It just had been 40k pms serviced. Did you replace the fuel filter during 40k pms?

thanks... Is there unusual smoke when jerking at 2000 rpm?

Thank you for your quick reply.

Fuel filter was not replaced, i think it was replaced during the 30k pms. I did not notice unusual smoke when jerking at 2000 rpm.

Before this problem occured, I complained at that concerned Isuzu dealer, during my 35k pm, a loss of "sibat" power during overtakings, they pressumed it was a clogged air filter, I have no idea if they done something on my auv with this complain.

By the way, i have noticed that in that particular Isuzu dealer, as shown in the job service sheet, DELVAC engine oil was used instead of the Isuzu Genuine Motor Oil (IGMO) and. "Mobil" brand for hub grease, diffrential oil, and power sterring fluid were used. They also put additives in the engine oil and diesel fuel. Is this a correct practice?

I am going to bring my auv in a different Isuzu dealer somewhere in Makati, though i live in quezon city. I bought that crosswind in a dealer in south metro manila and pms there until its 20k. However, when I transferred in qc, for praticality I started bringing my auv in that particular Isuzu dealer in quezon city, which I think has a low quality services.

More power to you Dieseldude.

[Dieseldude]

Thank you for your quick reply.

Fuel filter was not replaced, i think it was replaced during the 30k pms. I did not notice unusual smoke when jerking at 2000 rpm. I was asking this because black smoke could indicate an EGR problem. Try replacing your fuel filter.

Before this problem occured, I complained at that concerned Isuzu dealer, during my 35k pm, a loss of "sibat" power during overtakings, they pressumed it was a clogged air filter, I have no idea if they done something on my auv with this complain.

By the way, i have noticed that in that particular Isuzu dealer, as shown in the job service sheet, DELVAC engine oil was used instead of the Isuzu Genuine Motor Oil (IGMO) and. "Mobil" brand for hub grease, diffrential oil, and power sterring fluid were used. They also put additives in the engine oil and diesel fuel. Is this a correct practice? I don't know. But I don't think this will cause low power. Try refuelling with fresh diesel fuel..... no additives.

I am going to bring my auv in a different Isuzu dealer somewhere in Makati, though i live in quezon city. I bought that crosswind in a dealer in south metro manila and pms there until its 20k. However, when I transferred in qc, for praticality I started bringing my auv in that particular Isuzu dealer in quezon city, which I think has a low quality services. How is the condition of your clutch?.........shifting ok?....... no slippage?

More power to you Dieseldude. Thank you.

[Berrima Diesel]

Hi Dieseldude,
I just read through a few of your replies here. Good to see someone educating the public about diesels. We've been doing the same in AUstralia for years and also in Philippines for some time. You are correct when saying diesels dont have to smoke. The new CRD diesels are very clean and efficient and also have good power. If you want to visit our workshop please call 02 5331415 and we could show you around. Im sure you'd be impressed with our facilities and we love nothing more than talking about diesels so Im sure we'd have a lot in common. some photos at diesel.asia

cheers and safe driving,
Scott Leimroth

Berrima Diesel & Auto Service
219 JPRizal St Brgy Mabini
Mandaluyong City
Manila

[kaloy228]

Thank you for your quick reply.

Fuel filter was not replaced, i think it was replaced during the 30k pms. I did not notice unusual smoke when jerking at 2000 rpm. I was asking this because black smoke could indicate an EGR problem. Try replacing your fuel filter.

Before this problem occured, I complained at that concerned Isuzu dealer, during my 35k pm, a loss of "sibat" power during overtakings, they pressumed it was a clogged air filter, I have no idea if they done something on my auv with this complain.

By the way, i have noticed that in that particular Isuzu dealer, as shown in the job service sheet, DELVAC engine oil was used instead of the Isuzu Genuine Motor Oil (IGMO) and. "Mobil" brand for hub grease, diffrential oil, and power sterring fluid were used. They also put additives in the engine oil and diesel fuel. Is this a correct practice? I don't know. But I don't think this will cause low power. Try refuelling with fresh diesel fuel..... no additives.

I am going to bring my auv in a different Isuzu dealer somewhere in Makati, though i live in quezon city. I bought that crosswind in a dealer in south metro manila and pms there until its 20k. However, when I transferred in qc, for praticality I started bringing my auv in that particular Isuzu dealer in quezon city, which I think has a low quality services. How is the condition of your clutch?.........shifting ok?....... no slippage?

More power to you Dieseldude. Thank you.

You're absolutely right Dieseldue, the culprit was my fuel filter. It was replaced today and the jerkings on any rpm gone, smooth acceleration and the loss of sibat power during overtaking improved. Had i not consulted with your first baka ano anong troubles pa ihula ng mga taga casa instead of a simple fuel replacement costing lower of P400 and 30 mins to replace. I just asked the service advisor of that isuzu dealer to replace lang the fuel filter, mo more no less.

But still the problem was that the fuel replacement was not performed during the 40k pms which should have been done in accordance with the pms schedule. Hayyyyy... sometimes owners must be aware of those things and of those little maintenance negligence that will make a much bigger trouble.

MABUHAY KA DIESELDUDE... you'r damn good.

[jsaure72]

Hello Dieseldude,

Just wanted to ask how do I fix my problem for my trooper, my a/t cant seem to shift to overdrive when I drive at around 70kph and stays at high rpms. I had the atf changed and the filter cleaned, but still no improvement. They say that if might be due to the injection pump, but the my exhaust seems ok, di mausok.

[jepoy_187]

sir dieseldude..my ask lng po aq about misubishi pajero92..4d56T po yung engine nya..pg kc ta2ngalin q yung dipstick ng langis my lumalabas n hangin...tsaka pu sumusuka ng oil sa engine cap..anu po kya mganda gwin dun sir?....ty in advance po..

[jepoy_187]

sir dieseldude..my ask lng po aq about misubishi pajero92..4d56T po yung engine nya..pg kc ta2ngalin q yung dipstick ng langis my lumalabas n hangin...tsaka pu sumusuka ng oil sa engine cap..anu po kya mganda gwin dun sir?....ty in advance po..

[miked]

i think that's "blow-by" na boss. worn-out na piston rings mo kaya the pressure pass through the rings down to the crankcase and to the cylinder head cover via the oil ports. overhaul na ang solution jan. tignan natin advice ni diesel dude.

sir dieseldude..my ask lng po aq about misubishi pajero92..4d56T po yung engine nya..pg kc ta2ngalin q yung dipstick ng langis my lumalabas n hangin...tsaka pu sumusuka ng oil sa engine cap..anu po kya mganda gwin dun sir?....ty in advance po..

[Dieseldude]

sir dieseldude..my ask lng po aq about misubishi pajero92..4d56T po yung engine nya..pg kc ta2ngalin q yung dipstick ng langis my lumalabas n hangin...tsaka pu sumusuka ng oil sa engine cap..anu po kya mganda gwin dun sir?....ty in advance po..

Parang tama si Miked. Sumisingaw na ang compression sa clearances ng liners and piston rings. Normal ito sa high mileage engines. Tumataas ang blowby habang naluluma ang engine. Pwedo mo ipa complete overhaul ang engine, or pwede rin hindi. Depende yan sa startability ng makina, oil consumption, at sa kaya ng bulsa mo.

Kung madali mag start, at hindi naman kalakasan ang oil consumption, pwede pa mag delay ng overhaul.

[Dieseldude]

Hello Dieseldude,

Just wanted to ask how do I fix my problem for my trooper, my a/t cant seem to shift to overdrive when I drive at around 70kph and stays at high rpms. I had the atf changed and the filter cleaned, but still no improvement. They say that if might be due to the injection pump, but the my exhaust seems ok, di mausok.

Baka sira yung overdrive switch or wiring sa overdrive circuit.

Kung minsan, nagloloko and throttle position potentiometer ng injection pump. Pwede ito panggalingan ng poor transmission shifting.

[rugarai08]

good evening sir dieseldude

4JA1 po ang makina ko, katatapos ko lang mag pa overhaul last tuesday,
ang problema po ndi pa rin naalis ung mapilig ung makina (malakas ung vibrate) lalo na pag medyo maiinit na ung makina ko at pag kabukas ung aircon.

may problema po kaya yung injection pump ko?
nagpacalibrate na po ako last september, pero ganun pa din.

ano po kaya problema?

thanks.

[miked]

i think inherent na sa 4ja1 ung malakas ang vibrations as per my experience with 4ja1 for 3 years. during cold starts, A/C on. pero hindi naman masyado vibrating at high speeds na. from my point of view, dahil siguro sa timing gear sya e nagkakaroon ng torque reversal from the constant meshing of gears. just my opinion.
pero among the diesels i have driven, saludo pa rin ako sa 4ja1. matibay, matipid kahit mahina sa acceleration. namaneho ko na rin kahit nabali na pala yung isang valve at ayaw nang lumampas ng 30 km/h.

[amateur1]

I would like to help! Throw in your questions regarding problems with your fuel systems (injection pumps/ injectors/ turbochargers/ electronic systems/ etc.....) Then you guys take it from there...................if I can be of help, why not!

Sir, my mechanic advised me that my pajero needs "purging" in order to clean its diesel injectors and improve acceleration. Can you refer me any shop here in Metro Manila that conducts "purging" to diesel engines? Thanks in advance.

[Dieseldude]

good evening sir dieseldude

4JA1 po ang makina ko, katatapos ko lang mag pa overhaul last tuesday,
ang problema po ndi pa rin naalis ung mapilig ung makina (malakas ung vibrate) lalo na pag medyo maiinit na ung makina ko at pag kabukas ung aircon.

may problema po kaya yung injection pump ko?
nagpacalibrate na po ako last september, pero ganun pa din.

ano po kaya problema?

thanks.

Injection pump problem ito malamang.

[Dieseldude]

Sir, my mechanic advised me that my pajero needs "purging" in order to clean its diesel injectors and improve acceleration. Can you refer me any shop here in Metro Manila that conducts "purging" to diesel engines? Thanks in advance.

Your mechanic may have an idea on who can do "purging" for your Pajero. Is this a cleaning procedure using chemicals?

From experience, automization and spray quality of injectors gradually deteriorate over time due to erosion of spray holes. This is normal wear and tear. Worn out nozzles cannot be cleaned; they just have to be replaced.

[rugarai08]

Injection pump problem ito malamang.

ipa2 check ko na lang po ulit ung injection pump ko.

thanks dieseldude.

[jepoy_187]

thanks po sir mike and sir dieseldude..this helps me alot..ty and godbless..^^

[gcl_2000]

Hi Sir Dieseldude,

May I know kung saan po pwede makabili ng combination boost and pressure gauge para sa turbo? what brand will you recommend po sana? Thanks in advance. My engine is 4d56 turbo , My vehicle is a Mits Spacegear.

[jsaure72]

Baka sira yung overdrive switch or wiring sa overdrive circuit.

Kung minsan, nagloloko and throttle position potentiometer ng injection pump. Pwede ito panggalingan ng poor transmission shifting.

Ok naman yung switch, could having my injection pump checked help solve this?