Diesel Fuel Injection System Help Desk

[miked]

dieseldude,

would the engine still run even with one dead delivery valve?

as per my experience, bought a surplus ve4 pump for 5k with sprocket and idle-up. had it rebuilt and calibrated. then i had hard starting issues after the r & r. if i pump the priming pump the idle would go up. i also installed a clear hose at the suction line to see if air is leaking into the pump but no leaks. if you let it run for a few seconds without touching anything, idle is erratic. no external leaks. idle seem to go lower with each every drive so i had to adjust it. i found the problem myself after 2 visits to the calibration shop who did it. i found fuel leaking at the front of the pump when i replaced the timing belts since the belts seem to be very thin after 2 years. i thought it was only an oil seal but it turned out it was the pumps' bushing as the sprocket can be wiggled considerably even with the sprocket nut torqued to specs. funny the specialist at the shop did not see this. had the previous pump body installed with the surplus top cover and so far so good. i requested the shop to increase the idle speed to 800 rpm as the engine would vibrate wildly if i engage the transmission to drive. no offense meant dieseldude but i advise other motorists to check every nut and bolt after every r & r on your vehicles. do not simply trust the mechanic's hand. i had my idle speed screw loose after the pump replacement. just my experience.

[miked]

dieseldude,

if you remove a pump, do you use a puller or you simply strike the pump's shaft sharply to remove the sprocket? the mechanic who did my injection pump did the latter. i hope there are no side effects to the pump as i read some manuals that striking the shaft may cause the pump to malfunction.

thanks

[Dieseldude]

dieseldude,

if you remove a pump, do you use a puller or you simply strike the pump's shaft sharply to remove the sprocket? Puller is the correct and safest way.

the mechanic who did my injection pump did the latter. I've seen some mechanics do the latter procedure as well. Their blows are controlled to prevent damage to the pump.

I hope there are no side effects to the pump as i read some manuals that striking the shaft may cause the pump to malfunction.

thanks

[Fargin]

hi our crosswind has about 25k in the odometer. kelangan na kaya nya injector cleaning? what are the signs that the injectors need cleaning?

[Dieseldude]

hi our crosswind has about 25k in the odometer. kelangan na kaya nya injector cleaning? what are the signs that the injectors need cleaning?

You don't have to do anything if the car runs fine. 25k mileage is very low for injectors to fail.

Why do you want to have clean injectors?

[kramterrag]

Sir will try to butt in, Does this happen regularly or just sometimes? if sometimes its common for Isuzu engines if the accelerator pedal is pressed hard suddenly at this rpm range, try to gradually press the accelerator pedal or change to lower gear to increase speed.

BTW sir dieseldude, 4JB1t Isuzu TFS55, How do I know if thepriming pump is broken already? Have air in the system and can't find the leak pa, the priming pump is only about 2 years old original isuzu.

Sometimes it does, sometimes it doesn't. that's exactly what i'm experiencing. so i believe, natural lang to with 4JB1 engine. thanks boss ARB. Akala ko may kelangan na linisin or palitan sa pick up ko. salamat ulit

[Fargin]

You don't have to do anything if the car runs fine. 25k mileage is very low for injectors to fail.

Why do you want to have clean injectors?

just for preventive measures
what are the symptoms that my injectors are due for cleaning anyways?

[Dieseldude]

just for preventive measures
what are the symptoms that my injectors are due for cleaning anyways?

There are no symptoms which will which will warn you that injectors are due for cleaning.
There are signs that injectors need to be repaired:
1) Excessive fuel knock
2) Excessive black and/or white smoke on a good engine with a properly calibrated and timed pump, and with good filters.

Notes:
1) Failed or old nozzles cannot be cleaned.....these should be replaced.
2) Using good/original fuel filters is the best way to protect your pump and injectors.

[crazy_boy]

Dieseldude, will adding a secondary filter like the ones in patrol gq prolong the life of the injectors?

Sent from my GT-I9300 using Tapatalk 2

[icedeocampo]

Hi Dieseldude,

Thanks for the reply about query ko a few weeks ago. Anyways I plan to hold on to the vanette for maybe 5 years at least.

Now I'm looking for a diesel engine.

If you had a free hand to choose, which diesel engine would you pick (displacement would be between 2.0L to 2.7L)?

You have had a lot of experience on diesel engines, and which would you choose. Hope you can give me your thoughts on these.

(Of course, anyone who has an opinion to share is welcome to answer)

BR,

Ice

[vincr]

Hi Sir,

Is there a standard value for the TPS setting on a Pajero 4d56 TDIC A/T?

Thanks

[Dieseldude]

Hi Dieseldude,

Thanks for the reply about query ko a few weeks ago. Anyways I plan to hold on to the vanette for maybe 5 years at least.

Now I'm looking for a diesel engine.

If you had a free hand to choose, which diesel engine would you pick (displacement would be between 2.0L to 2.7L)?

You have had a lot of experience on diesel engines, and which would you choose. Hope you can give me your thoughts on these.

(Of course, anyone who has an opinion to share is welcome to answer)

BR,

Ice

Sorry Ice. I am not familiar with engine modifications. Your best bet is to ask the 2nd hand engine sources. They have more experience on this.....

[icedeocampo]

Sorry Ice. I am not familiar with engine modifications. Your best bet is to ask the 2nd hand engine sources. They have more experience on this.....

Sorry for the vague question.

If you were to choose an engine based on ease of maintenance, reliability and prices of parts, and to a lesser extent fuel efficiency and smoke belching tendency - just to be on equal footing we are actually discarding the fact if the engine can be mounted or not.



Thanks

[Dieseldude]

Sorry for the vague question.

If you were to choose an engine based on ease of maintenance, reliability and prices of parts, and to a lesser extent fuel efficiency and smoke belching tendency - just to be on equal footing we are actually discarding the fact if the engine can be mounted or not.



Thanks

Mits 4M40 is fine.

[icedeocampo]

Mits 4M40 is fine.

thanks again. much appreciated

[pingpongdad]

mr dieseldude,

i am reposting my query in another thread, seeking your expert opinion:

when do you say that the black emissions from a diesel engine are abnormal and need checking? from different threads, they say black smoke emissions are "normal" either in brand new (not yet broken in) or very old poorly maintained engines, in the morning (cold engine) and when accelerating hard.

2012 monterosport gls-v (odo 2800km) emits black smoke when stepping on the pedal hard (approx more than 2000 rpm). smokeless during idle and low rpms. it has been checked in the casa already (nothing wrong with computer diagnostics). previous replies i got:
"normal in the morning for diesels",
"normal in diesels as long as not in idle and no soot around muffler",
"normal not yet broken in" ,
"dirty fuel by big three" (been using shell regular super-save diesel and synthetic engine oil),
"need to add fuel treatments"(given fuel treatment at 1k pms, did not add when i filled my tank)

not used to diesels. previous rides are gas engines. hope you can enlighten. thanks a lot

[glenn manikis]

mr dieseldude,

i am reposting my query in another thread, seeking your expert opinion:

when do you say that the black emissions from a diesel engine are abnormal and need checking? from different threads, they say black smoke emissions are "normal" either in brand new (not yet broken in) or very old poorly maintained engines, in the morning (cold engine) and when accelerating hard.

2012 monterosport gls-v (odo 2800km) emits black smoke when stepping on the pedal hard (approx more than 2000 rpm). smokeless during idle and low rpms. it has been checked in the casa already (nothing wrong with computer diagnostics). previous replies i got:
"normal in the morning for diesels",
"normal in diesels as long as not in idle and no soot around muffler",
"normal not yet broken in" ,
"dirty fuel by big three" (been using shell regular super-save diesel and synthetic engine oil),
"need to add fuel treatments"(given fuel treatment at 1k pms, did not add when i filled my tank)

not used to diesels. previous rides are gas engines. hope you can enlighten. thanks a lot

just add 2T sir.... diesel engine woes will be lessen... like smoke, vibration, turn off shutter and engine noise..... guranteed!!!

[Dieseldude]

mr dieseldude,

i am reposting my query in another thread, seeking your expert opinion:

when do you say that the black emissions from a diesel engine are abnormal and need checking? from different threads, they say black smoke emissions are "normal" either in brand new (not yet broken in) or very old poorly maintained engines, in the morning (cold engine) and when accelerating hard.

2012 monterosport gls-v (odo 2800km) emits black smoke when stepping on the pedal hard (approx more than 2000 rpm). smokeless during idle and low rpms. it has been checked in the casa already (nothing wrong with computer diagnostics). previous replies i got:
"normal in the morning for diesels",
"normal in diesels as long as not in idle and no soot around muffler",
"normal not yet broken in" ,
"dirty fuel by big three" (been using shell regular super-save diesel and synthetic engine oil),
"need to add fuel treatments"(given fuel treatment at 1k pms, did not add when i filled my tank)

not used to diesels. previous rides are gas engines. hope you can enlighten. thanks a lot

All diesel engines emit more smoke during acceleration. The acceptable level of smoke depends upon legislation, or the emission standards of the country. For example, a vehicle passing our smoke emission test will not pass in other countries which have stricter emission laws.

The only way to accurately check and measure smoke levels is through the use of an emission testing tool which is calibrated to the emission standards of the the specific area/country.

[pingpongdad]

just add 2T sir.... diesel engine woes will be lessen... like smoke, vibration, turn off shutter and engine noise..... guranteed!!!

many thanks. is the 2T diesel fuel additive the same as the "fuel treatments" being done during PMS? i was given a 250ml sealed plastic bottle, with Diamond Motors fuel treatment as label. it did not specify contents. instruction was given by a technician to just empty the bottle next time i fill my tank.

[pingpongdad]

All diesel engines emit more smoke during acceleration. The acceptable level of smoke depends upon legislation, or the emission standards of the country. For example, a vehicle passing our smoke emission test will not pass in other countries which have stricter emission laws.

The only way to accurately check and measure smoke levels is through the use of an emission testing tool which is calibrated to the emission standards of the the specific area/country.

best response i got so far which makes perfect sense. very grateful on the prompt reply. next question, since it is brand new, can we assume that its emissions are normal since it is also assumed that all brand new vehicles undergo formal emissions testing before they are released?

third ( i hope you dont mind rookie diesel engine queries), short of doing a formal emissions test, just confirming that black smoke from a diesel engine accelerating is indeed normal? when does it become excessive and need being brought to the casa?

are there remedies to lessen such black smoke emissions like the 2T fuel additive, using euro IV compliant fuel, using diesel fuel with a higher octane rating (if there is such), using synthetic engine oil, using a special fuel filter, etc.

your replies are very much appreciated. hope you continue such.