Diesel Fuel Injection System Help Desk

[zed2d]

You will probably have a slight improvement on fuel consumption, and a decrease in power as well.

So meaning to say if i preheat the fuel I would have a slightly better fuel consumption because of complete burn but how come it would afect my power when it's copletely burning all the fuel correct me if i'm wrong.

[Dieseldude]

sir

just would like to know kung saan pwede magpacalibrate ng direct injection engine. sabi kasi sa akin pa calibrate ko daw ang injection pump ko... any place you know near cavite area lang po sana..

thanks

Wala akong kilalang diesel workshop sa area mo. Ano ba ang car mo, at ano ang problem? Baka hindi mo naman kelangan magpacalibrate.

[Dieseldude]

So meaning to say if i preheat the fuel I would have a slightly better fuel consumption because of complete burn but how come it would afect my power when it's copletely burning all the fuel correct me if i'm wrong.

Diesel fuel doesn't require preheating due to our warm climate.

Preheating expands fuel, lowering it's mass. You will therefore have less fuel going to your engine. Less fuel = less power.

[Dieseldude]

Toyota 2C Normally aspirated

A mechanic has replaced the water pump unfortunately there are no timing marks on the cam, injection or crank pulleys. Timing marks/pointers should be there.

After the assembly, the engine took some time to start (run at idle for a few minutes then turned off the key). After the mechanic left It is still hard to start and it died. My brother filled the tank with one gallon of diesel. then it started but there is some terrible noise as if an injection noise or a high pitched metal noise. Actually I left the mechanic with my brother and never witnessed the first or second start ( I had something important to do).

Is our camshaft or piston or valved already destroyed? Nobody knows. You need a good mechanic to check this problem.

How do you time a diesel without, markings? This is possible, but difficult to explain in a few words. As I earlier stated, markings are there, ......... not unless somebody filed it down, or you may have installed non-original parts (pulleys, etc).

What shall I do now? Thanks in advance.. Hire a good mechanic. Or get hold of a 2C workshop manual if you want to do a DIY. Ask around, some Tsokoters may want to share this manual with you.

Read more: http://tsikot.com/forums/engine-fuel...#ixzz1QOXcmb6J

[dumbo921]

im out of the country at sabi lang sa akin ni misis di na daw maganda ang sunog ng krudo sabi ng mga kakilala nya sa driver sa school na pinapasukan ng mga anak namin. my car isa Isuzu crosswind XTO 2001 model po. any advice on this .. sabi sa akin ng bilas ko palitan ko daw yu fuel filters at air filter.... thanks in advance

[dumbo921]

Wala akong kilalang diesel workshop sa area mo. Ano ba ang car mo, at ano ang problem? Baka hindi mo naman kelangan magpacalibrate.

im out of the country at sabi lang sa akin ni misis di na daw maganda ang sunog ng krudo sabi ng mga kakilala nya sa driver sa school na pinapasukan ng mga anak namin. my car isa Isuzu crosswind XTO 2001 model po. any advice on this .. sabi sa akin ng bilas ko palitan ko daw yu fuel filters at air filter.... thanks in advance

[marz]

Sir Dieseldude san po location ng shop nyo? TIA

[Dieseldude]

im out of the country at sabi lang sa akin ni misis di na daw maganda ang sunog ng krudo sabi ng mga kakilala nya sa driver sa school na pinapasukan ng mga anak namin. my car isa Isuzu crosswind XTO 2001 model po. any advice on this .. sabi sa akin ng bilas ko palitan ko daw yu fuel filters at air filter.... thanks in advance

Tama ang bilas mo. Try mo muna replace air filter.

[larjhones]

Hello fellow 4ja1 owner:

I'm a newbie here and would like to seek your expertise regarding my unit Isuzu Hilander SL '97 with isuzu 4ja1 engine.
These are my issues:
A. Black smoke comes out in first few seconds upon engine start-up and followed by too much smoke (white to grayish white) during engine running idle but reduces when engine is hot.
B. Along with the smoke is a strong smell of which I think unburnt diesel.[/B]

What do you think are the possible culprit? Other conditions listed below for your reference if anyone can help me troubleshoot my problem.
1. Odometer reading 95,000+; i'm not sure if it wasn't tweaked by previous owner.
2. Doesn't eat up oil I guess 'coz I rarely consumed 500ml oil for top-up in between oil change.
3. Replaced fuel filter and cleaned water separator.
4. Replaced air filter with the L200 cartridge. Logically, I found it less restrictive in terms of air flow since it fully perforated all around allowing more air with less restriction. Unlike air filter intended for 4ja1 which is half mask perforated cartridge.
5. Checked nozzle tips opening pressure and witnessed it still opens at required opening pressure based on 4ja1 manual. Though, one nozzle found to have not spraying the correct pattern so it was dismantled and cleaned, fortunately the spray went okay as others.
6. Used biodiesel on several full tanks with recommended mixture specified on the bottle, MC55. Even used it twice 100% biodiesel feed directly to injection pump (supply/return) until 1 liter of it consumes and rev the engine at several RPM's on two separate occasions.
7. Check valve clearance in cold condition at 0.014 inch as specified on the manual.
8. Opened oil filler cap and oil dipstick while engine running but no oil spitting observed not unless if I rev the engine.
9. Average km/Li: Hiway = 14, City = 10, Mixed = 12. A/C on.
10. Regularly flushed-out carbon from exhaust pipe with soap and water.
11. Oil changed: every 5,000 km or 6mos. with minimum required SAE40 or 15W-40 oil, CD to CI grade shell or petron.
12. Only light to moderate driving conditions mostly 60% hiway and 40% city
13. One click start even on cold and rainy days.
14. No significant loss of power detected, pick-up is still still okay even if fully loaded.
15. No heavy smoke on high RPM's not unless if uphill and within wrong range of speed and rpm.
16. Even run the engine with no air filter, still the annoying smoke persists.
17. Definitely not blown head gasket I think 'coz I rarely top-up coolant on my radiator. Also, no milky residue or oil presence on radiator cap and no significant air bubbles observed with engine is running.
18. Also tried to adjust injection pump feed valve, kaso ganun parin puit at mabahong usok na parang incomplete combustion yung amoy.
18. Oil level maintain at max-level pag standby yung engine at level ground or nasa in between low-max after 5-minutes off yung engine.

With all these things I've done so far, do you think guys something I missed? Or do I really need to check / service my injection pump?

Thank you very much to all and more power!

[GIjoejoe]

hi diesel dude, I have a problem with my toyota fortuner 3.0 automatic. Hope you can help me. The problem is that, when starting from a stop position and you start to rev the engine, walang hatak, usually takes about 2 second for the fortuner to move forward. However, while on the move na, wala namang problema, malakas humatak at malakas ang hataw. The only problem is yun nga, pag from a stop positiion. You can hear the engine rev pero ayaw umandar, only after mga 2 second bago aandar yung fortuner. .... my fortuner is casa maintained so regular ako nag papa service, every 5k. When I brought my fortuner to the casa, medyo parang trial and error ang gagawin nila, sabi nila, change muna suction control valve, then pag di parin gumana papalitan na raw yung mga fuel injector.

Hope you can help.. thanks in advance.

[Dieseldude]

Hello fellow 4ja1 owner:

I'm a newbie here and would like to seek your expertise regarding my unit Isuzu Hilander SL '97 with isuzu 4ja1 engine.
These are my issues:
A. Black smoke comes out in first few seconds upon engine start-up and followed by too much smoke (white to grayish white) during engine running idle but reduces when engine is hot. Check engine compression....
B. Along with the smoke is a strong smell of which I think unburnt diesel.[/B]

Check injection pump to engine timing.

[LEFT]What do you think are the possible culprit? Other conditions listed below for your reference if anyone can help me troubleshoot my problem. Low cylinder compression pressure is very possible.

[Dieseldude]

hi dieseldude, I have a problem with my toyota fortuner 3.0 automatic. Hope you can help me. Of course I'll try.

The problem is that, when starting from a stop position and you start to rev the engine, walang hatak, usually takes about 2 second for the fortuner to move forward. However, while on the move na, wala namang problema, malakas humatak at malakas ang hataw. The only problem is yun nga, pag from a stop positiion. You can hear the engine rev pero ayaw umandar, only after mga 2 second bago aandar yung fortuner..... Since you said that the engine revs up but the vehicle doesn't move........Auto transmission clutch is probably slipping. Check automatic transmission filter and oil level.

my fortuner is casa maintained so regular ako nag papa service, every 5k. When I brought my fortuner to the casa, medyo parang trial and error ang gagawin nila, sabi nila, change muna suction control valve, then pag di parin gumana papalitan na raw yung mga fuel injector. Replacing these parts will cost you more than 100K. Ask the casa for an estimate. Ask them too if they have the necessary test parts (scv and injectors) to validate their diagnosis. Casa should not bill you for these parts if your complaint is not corrected. They can bill you for diagnostics though. Fyi, Toyota common rail injectors can be rebuilt to like-new condition which will definitely save you money.

Hope you can help.. thanks in advance. You are welcome...

[GIjoejoe]

Thank you so much dieseldude. toyota commonwealth casa checked the atf oil and the filter was just replaced last december. But I think I'll have the clutch checked, it might be worn out. If all else fails, I'll then ask the casa if they would have test parts to validate their diagnosis... I'd willingly pay the diagnostic fees rather than pay for replaced parts that aren't really defective... thanks again.

By the way, is there any shop in Quezon City you would recommend where I can have my clutch checked? thanks again

[Dieseldude]

Thank you so much dieseldude. toyota commonwealth casa checked the atf oil and the filter was just replaced last december. But I think I'll have the clutch checked, it might be worn out. If all else fails, I'll then ask the casa if they would have test parts to validate their diagnosis... I'd willingly pay the diagnostic fees rather than pay for replaced parts that aren't really defective... thanks again. You're welcome....

By the way, is there any shop in Quezon City you would recommend where I can have my clutch checked? thanks again. Sorry, I don't know.

[larjhones]

Hello fellow 4ja1 owner:

I'm a newbie here and would like to seek your expertise regarding my unit Isuzu Hilander SL '97 with isuzu 4ja1 engine.
These are my issues:
A. Black smoke comes out in first few seconds upon engine start-up and followed by too much smoke (white to grayish white) during engine running idle but reduces when engine is hot. Check engine compression....
B. Along with the smoke is a strong smell of which I think unburnt diesel.[/B]

Check injection pump to engine timing.

[LEFT]What do you think are the possible culprit? Other conditions listed below for your reference if anyone can help me troubleshoot my problem. Low cylinder compression pressure is very possible.

Thanks dieseldude sa replies. Follow-up questions ko lang regarding sa mga suggestions mo. How come po na low compression yung culprit eh One click start naman po kahit maulan at malamig weather. Hindi rin naman po nagbabawas ng oil. In either way low compression po kung rings, liners, valve guides or seal yung worn-out na, definitely papasok yung oil sa combustion chamber at susunugin. Tama po ba or mali yung assumption ko. Paki-expound po further yung point ninyo. I'm afraid po kasing i-admit na my internal problem talaga itong 4ja1 ko samantala less than a year pa to sa akin at less than 10,000km ko pa nagamit at hindi naman to dati kausok. Many thanks dieseldude!

[Dieseldude]

Thanks dieseldude sa replies. Follow-up questions ko lang regarding sa mga suggestions mo. How come po na low compression yung culprit eh One click start naman po kahit maulan at malamig weather. Malaki ang naitutulong ng heater plugs sa starting.

Hindi rin naman po nagbabawas ng oil. Mas maaga mag wear out ang compression rings kaysa oil control rings. Mas malalim din ang wear ng liners sa may bandang taas, sa tapat ng top ring dahil pinakamataas ang combustion pressures dito. Hindi magbabawas ng oil kung ok pa ang kundisyon ng oil rings.

In either way low compression po kung rings, liners, at kung leaking ang valves...valve guides or seal yung worn-out na... definitely papasok yung oil sa combustion chamber at susunugin. Papasok ang oil sa combustion area kung maluwag na ang oil control rings.

Tama po ba or mali yung assumption ko. Paki-expound po further yung point ninyo. Tanggalin mo ang oil dip stick or oil filler cap; tapos tingnan mo kung malakas na ang blowby.

I'm afraid po kasing i-admit na my internal problem talaga itong 4ja1 ko samantala less than a year pa to sa akin at less than 10,000km ko pa nagamit at hindi naman to dati kausok. Magpa-compression test ka habang malamig ang makina para makasigurado ka sa tunay na kundisyon ng makina mo.

Many thanks dieseldude! You're welcome....

[marz]

Sir Dieseldude help naman, ayaw kasi mawala ilaw ng sedimenter sa dashboard kahit na pump out ko na yung diesel/water sa fuel filter
pero na observed ko parang wala namang tubig yung fuel filter saka almost half liter na ng diesel nadrain da filter.
Sir ano kaya pwedeng maging culprit nun? Pwede rin kayang grounded na yung sedimenter sensor? TIA

[Dieseldude]

Sir Dieseldude help naman, ayaw kasi mawala ilaw ng sedimenter sa dashboard kahit na pump out ko na yung diesel/water sa fuel filter
pero na observed ko parang wala namang tubig yung fuel filter saka almost half liter na ng diesel nadrain da filter.
Sir ano kaya pwedeng maging culprit nun? Pwede rin kayang grounded na yung sedimenter sensor? TIA

What is your car?

[marz]

Kia Pregio Sir

[Dieseldude]

Kia Pregio Sir

Sorry, I can't give you a definite answer. You may be right though about a short circuit to ground on the fuel filter's water sensor. We've done a lot of Pregios but have never seen this problem.