Diesel Fuel Injection System Help Desk

**Dieseldude** · February 16th, 2011 09:18 PM

Originally Posted by eugene emmanuel

sir takumi san/diesel dude,
share ko lang po experience me abt pajero hardstarting
my ride is a 95 model pajero, local version with 4d56 tdic
hard start dn po..and after starting, may black smoke spurting at first, then light smoke followed while engine is still cold.

first action taken, replaced air filter...replaced all the glow plugs with good one...also found out that the glow plugs relay are not working..also replaced with original glow plug relay at php2300, and php300/each for glow plugs...medyo nabawasan ang redondo nya bago mag start5..dati mga 15 redondo bago mag start...after replacing relay and glow plugs, naging 10 redondo nalang...

2nd action taken, replaced fuel filter and fuel filter body with replacement brand only...bad move...not original fuel filter body have generally poor check valve mechanism/material w/c causes the back flow of diesel, thus contributing to hard starting.. no choice but sorted to original fuel filter body for php 3500, and original fuel filter element for php 1400 from mitsubishi motors... after replacing fuel filter and body, from 10 redondo naging5 redondo nalang...

3rd action taken, had my injectors and injection pump calibrated...and replaced worn out parts including all 4 nozzle tips, and some injection pump parts...caused me php 13800 for labor and materials... guess what, hard starting is completely solved...from 5 rodondo, now, it only take 1 redondo (crank) and the engine starts easily...with 1 heating cycle only and at cold weather...and i was happy because the noticeable tail pipe smoke is now a thing of the past...may konteng spurt of light smoke lang pag start ng engine and after that, wala nang makikitang usok, as in.. sinubukan ko nga ring itutok ilong ko few inches from tail pipe, d sya masakit sa ilong kumpara dati...
and mas naging responsive at maganda power ng engine at mas tumaas fuel mileage ko after those steps...

kaya i don't believe na sabi ng iba, sakit daw ng pajero ang hardstarting at black smoke...proper engine maintenance lang po...

hope sharing my experience helps...

thanks mga sirs.

Thanks for sharing your experience Eugene. Tama yung troubleshooting steps ginawa mo, from simple to most difficult. And you were able to track performance improvement at each step........

**edtf** · February 17th, 2011 09:49 AM

great tips Eugene. Planning to condition a 4d56 soon too.

question lang for the diesel dudes
Mine has new filters starts well but emits smoke especially once you step on the throttle hard (to speed up nothing too harsh) I guess calibration is in order?

**Dieseldude** · February 17th, 2011 02:41 PM

Originally Posted by edtf

great tips Eugene. Planning to condition a 4d56 soon too.

question lang for the diesel dudes
Mine has new filters starts well but emits smoke especially once you step on the throttle hard (to speed up nothing too harsh) I guess calibration is in order?

Very possible.

**edward_651** · February 22nd, 2011 02:45 AM

Sir Dieseldude,

Pwede po pa-pm ng location ng shop niyo?

Balak ko kasi magpa-check up ng 00 Hilux 2.4 sa inyo, nag-eemit na black smoke kapag nasa 2k+ yung RPM. Otherwise naman, wala naman akong nakikitang ibang problem (Para naman pumasa legally yung kotse sa emissions testing haha)

Thanks

**Dieseldude** · February 22nd, 2011 09:50 AM

Originally Posted by edward_651

Sir Dieseldude,

Pwede po pa-pm ng location ng shop niyo?

Balak ko kasi magpa-check up ng 00 Hilux 2.4 sa inyo, nag-eemit na black smoke kapag nasa 2k+ yung RPM. Otherwise naman, wala naman akong nakikitang ibang problem (Para naman pumasa legally yung kotse sa emissions testing haha)

Thanks

I will PM you.

Check/replace air filter muna. Baka ma-solve na ang black smoke problem mo.

**hisoka101** · February 22nd, 2011 10:10 AM

Originally Posted by eugene emmanuel

sir takumi san/diesel dude,
share ko lang po experience me abt pajero hardstarting
my ride is a 95 model pajero, local version with 4d56 tdic
hard start dn po..and after starting, may black smoke spurting at first, then light smoke followed while engine is still cold.

first action taken, replaced air filter...replaced all the glow plugs with good one...also found out that the glow plugs relay are not working..also replaced with original glow plug relay at php2300, and php300/each for glow plugs...medyo nabawasan ang redondo nya bago mag start5..dati mga 15 redondo bago mag start...after replacing relay and glow plugs, naging 10 redondo nalang...

2nd action taken, replaced fuel filter and fuel filter body with replacement brand only...bad move...not original fuel filter body have generally poor check valve mechanism/material w/c causes the back flow of diesel, thus contributing to hard starting.. no choice but sorted to original fuel filter body for php 3500, and original fuel filter element for php 1400 from mitsubishi motors... after replacing fuel filter and body, from 10 redondo naging5 redondo nalang...

3rd action taken, had my injectors and injection pump calibrated...and replaced worn out parts including all 4 nozzle tips, and some injection pump parts...caused me php 13800 for labor and materials... guess what, hard starting is completely solved...from 5 rodondo, now, it only take 1 redondo (crank) and the engine starts easily...with 1 heating cycle only and at cold weather...and i was happy because the noticeable tail pipe smoke is now a thing of the past...may konteng spurt of light smoke lang pag start ng engine and after that, wala nang makikitang usok, as in.. sinubukan ko nga ring itutok ilong ko few inches from tail pipe, d sya masakit sa ilong kumpara dati...
and mas naging responsive at maganda power ng engine at mas tumaas fuel mileage ko after those steps...

kaya i don't believe na sabi ng iba, sakit daw ng pajero ang hardstarting at black smoke...proper engine maintenance lang po...

hope sharing my experience helps...

thanks mga sirs.

Halos pareho tayo ng procedure na ginawa sir! May binubuhay kasi akong owner type jeep (Isuzu Gemini Diesel ang engine nya). Hard starting with black smoke sya pag 1st start mo sya pero pag napaandar mo na sya eh
nde na problema ang stating.. 1st step na ginawa namin is replace glow plugs then the fuel filter and we also checked the battery and alternator kung nag-charge ba sya ng maayos... may improvement naman kaso tyambahan sa pag start average nya is mga 15 redondo bago mag start kaso minsan ayaw pa rin mag start sa umaga....now we are in the last part which is pina-calibrate na namin iyung injector nozzle and injector pump sabi sa calibration eh hindi na maganda ang buga nung nozzle (sabog na daw ang buga nya so we replaced it) sabi rin sa calibration na medyo mahina na daw iyung injection pump so we have to replace it pero pwede pa naman daw kasi bago daw iyung fuel filter..basta wag lang daw matuyuan ng deisel at baka daw magka-hangin (tama ba iyung suggestion nung nasa calibration?)... also sabi nung mechanic namin since na matagal nang naka-stock iyung makina eh i-check na rin daw namin iyung mga piston and piston rings kung ok pa at para malinis na rin ang carbon deposits sa loob (overhaul na).. hopefully by the end of the week matapos na eto.. inform ko kayo kung ano ang naging results..

Sana nakatulong....

P.S.

Sir Dieseldude anu po ba advice nyo sa injector pump problem ko? Better fix the internal parts or have it replaced na? Deperately need your expert advice..

Maraming maraming salamat po ...

**Dieseldude** · February 22nd, 2011 09:27 PM

Halos pareho tayo ng procedure na ginawa sir! May binubuhay kasi akong owner type jeep (Isuzu Gemini Diesel ang engine nya). Hard starting with black smoke sya pag 1st start mo sya pero pag napaandar mo na sya eh
nde na problema ang starting.. Ok ba and power?

1st step na ginawa namin is replace glow plugs then the fuel filter and we also checked the battery and alternator kung nag-charge ba sya ng maayos... may improvement naman kaso tyambahan sa pag start average nya is mga 15 redondo bago mag start kaso minsan ayaw pa rin mag start sa umaga.... Did you use the correct glow plugs? Kung mali, baka napundi agad ito. Baka mababa ang current handling capacity ng glow plug switch or glow relay?

now we are in the last part which is pina-calibrate na namin iyung injector nozzle and injector pump sabi sa calibration eh hindi na maganda ang buga nung nozzle (sabog na daw ang buga nya so we replaced it) sabi rin sa calibration na medyo mahina na daw iyung injection pump so we have to replace it pero pwede pa naman daw kasi bago daw iyung fuel filter..basta wag lang daw matuyuan ng deisel at baka daw magka-hangin (tama ba iyung suggestion nung nasa calibration?)...Hindi ko alam kung paano nila kinalibrate ng pump mo. Meron ba silang calibration data ng pump mo? Ok ang pump kung napa ayon nila ang settings nito sa test specifications. Calibration is simply adjusting a pump and/or injectors to conform to test specs.

also sabi nung mechanic namin since na matagal nang naka-stock iyung makina eh i-check na rin daw namin iyung mga piston and piston rings kung ok pa at para malinis na rin ang carbon deposits sa loob (overhaul na).. hopefully by the end of the week matapos na eto.. inform ko kayo kung ano ang naging results.. Check timing muna!!!!!

Sana nakatulong....

P.S.

Sir Dieseldude anu po ba advice nyo sa injector pump problem ko? Better fix the internal parts or have it replaced na? Deperately need your expert advice.. Tanungin mo yung shop na nag calibrate ng pump mo. Sila ang makaka advise sayo dahil nakita nila ang output ng pump mo, at nai-compare nila ito sa specs.

Maraming maraming salamat po ... You're welcome...

**beetlebmble** · March 6th, 2011 01:03 PM

Sir jake

Concerning a hilux 2.8 3L (99 model), 250000 km on the odometer, fuel consumption a bit to 8-9 km ltr on city driving unlike before which is 11-12km. Hindi naman mausok and pino naman ang takbo. Clutch is not yet replaced since brand new pero not yet slipping. Engine oil is Total fully synthetic for Diesel.

Sir, nozzle replacement is required for this? Also there are no leaks sa injection pump.

**Dieseldude** · March 7th, 2011 08:36 AM

Originally Posted by beetlebmble

Sir jake

Concerning a hilux 2.8 3L (99 model), 250000 km on the odometer, fuel consumption a bit to 8-9 km ltr on city driving unlike before which is 11-12km. Hindi naman mausok and pino naman ang takbo. Clutch is not yet replaced since brand new pero not yet slipping. Engine oil is Total fully synthetic for Diesel.

Sir, nozzle replacement is required for this? Also there are no leaks sa injection pump.

I really know. The only way to really find out is by having the injection pump and injectors checked for conformance to calibration specs. If they do, high FC could be due to engine wear, blocked air filter, timing deviation, etc.

FC is critical due to today's rising fuel cost.

**timo07** · March 7th, 2011 08:55 AM

Originally Posted by Dieseldude

I really know. The only way to really find out is by having the injection pump and injectors checked for conformance to calibration specs. If they do, high FC could be due to engine wear, blocked air filter, timing deviation, etc.

FC is critical due to today's rising fuel cost.

Might be a good idea to service the clutch assembly/transmission system also, not that it affects FC, or would it?