Fuel Injection Calibration 101

[Doc Diesel]

A lot of people don't seem to understand how calibration works, what it does to your engine, how much it costs, how to diagnose if it needs it and other stuff.

I was thinking of putting up a sticky thread for everybody to read before throwing all kinds of questions for everybody to be informed and educated on the subject matter.

I may be raising some eyebrows with this action as anybody might ask, "who are you to teach us?" there may be more but it's up to you guys. I am just trying to help so that when you need that kind of service, you know what to say to a diesel mechanic, what problems to tell him, what to look out for on cost estimates and what kind of shops to avoid.

If anyone is interested, post your questions below and add to it by copy and then pasting it to another post. I'll set the break point at 15 questions.

Hope this will help everybody.

[vinj]

This is cool.

You can start with what are the tell-tale signs that calibration will be needed before moving on to the process itself. Also, what are the signs that it doesnt need calibration but some other type of service to help people from being duped.

[bilog]

Here's my question Doc,

my td42 seems to be chokig on third gear especially on high revs and on hil climbs. During morning warm ups it suddenly drops its rpm down to 1500. But once the engine heats up it normalizes. I changed the fuel filters already.

[dudetalaga]

hi Doc Diesel, i myself personally appreciate your concern for the fact that zero talaga ako theoretically sa makina. i suspect the information involved would be a massive one but is it possible for you to draw up a calibration basics first (like in a nutshell) para nga maintindihan ko, in layman's terms? and then progressively, we can go on with the problems and symptoms and on with solutions, etc.

in my case, somebody told me that my 4m40 ay medyo malakas ang konsumo and maybe needs calibration or something. isa pa, when i press on the accelerator, hindi agad umaarangkada, there's a delay bago mag-pick-up.

thanks.

[Doc Diesel]

so I got:

1. Tell tale signs to look out for.
2. Signs or what to look out for other types of services.
3. Engine diagnosis [somewhat related to tell tale signs].
4. Calibration flow chart with solutions.

anybody else? can we have the mods make this or the new thread a sticky one?

[impulzz]

Doc Diesel,

my 94 hi-ace(2L engine) is strating to emit black smoke lalu na pag medyo napalakas apak mo sa pedal. pinakita ko sa denso(banawe) sabi nila injector tips daw papalitan... parts and labor 4K++... then he added kung di maalis usok calibration na ng pump kelangan... so now di ko pa ninagawa... still would like to know more about the signs kung injector tip ba o calibrate na agad...

to add, engine power is still the same as before... consumo sa krudo ganun pa rin city driving nasa 7-8 kms with dual aircon... pero mausok lang talaga

[nugundam93]

4. Calibration flow chart with solutions.

<--- is this the same as listing what exactly happens when doing calibration, what tools used, etc?

this is a nice thread, +1 on making this a sticky. :D

[promdiboy]

pasali narin. what if ang laki ng tinaas ng emission testing ko. same shop naman and equipment from .39 to .38 to 1.1 na. sabi ng tester next year babagsak na raw ako. calibration ba ang kailangan. local 4m40 engine 6 years old with 65 k on the odometer.

[eurie]

kaylan po ba kaylangang magpa-calibrate? 5 years na 4d56 ko,ginagawa ko lang lagi ko lang nililinis strainer ko.ok lang ba yun doc? 143,000 odometer

[KCboy]

ako po 77,000km odometer ko and i feel i need a calibration na din since last time ko was 2001 pa. just had me tips replaced 2 years ago....

[acenie]

kung mag change gear ako tapos tatapakan ko yung RPM, biglang may lalabas na Black smoke. May connection ba sa nozzle Tip or the injection pump ang black smoke.

[docvic]

I commend you for this noble effort docdiesel.
I had a 2.6 reading during the last emission testing and a 6-7 km/liter fuel consumption for purely city driving. My ride is a 95 2.5 TDIC with 87K in the odometer. Do you think I need calibration of my pump or injector tips lang ang kailangan i-check. Maraming salamat at huwag sana kayo magsawa sa pagtulong sa kapwa.

[docvic]

I commend you for this noble effort docdiesel.
I had a 2.6 reading during the last emission testing and a 6-7 km/liter fuel consumption for purely city driving. My ride is a 95 2.5 TDIC Paj with 87K in the odometer. Do you think I need calibration of my pump or injector tips lang ang kailangan i-check. Maraming salamat at huwag sana kayo magsawa sa pagtulong sa kapwa.

[av8or5]

i too like this thread. in addition to the questions above, when do you really need to have your ride calibrated? my troop although less than 3 years with 20k mileage exhaust black smokes specially if you need more speed. kakahiya. but i have seen this in most isuzu rides. is this really normal or i need to have something adjusted. i just had my 20k PMS done and changed fuel filter as well, but nothing changed.

[Doc Diesel]

so far...

1. Tell tale signs to look out for.
2. Signs or what to look out for other types of services.
3. Engine diagnosis [somewhat related to tell tale signs].
4. Calibration flow chart with solutions. Tools will not be included as this are not ordinary tools.
5. How to drive diesel engines without smoke belching.
6. Emission testing.
7. Calibration timelines or recommended intervals either in years or odo readings.

anybody else? can we have the mods make this or the new thread a sticky one?

I'll do everything this weekend so answers will be posted by monday in several formats like .doc, .pdf, .txt or .html or simply posted everything here.

[lancelot]

Doc Diesel,


I have a 2000 pajero 2.8 Napansin ko mahina na hatak. On highways when overtaking nageemit ng black smoke like a squid pero this happens pag nagdown shift yun auto tranny niya. Medyo malakas siya sa diesel. Around 4 lng siya city driving lng. Have failed emmission tests na rin for last 2 years. 46,000 kms na siya. Am planning palang pero would more or less like to know costs. TY

[jeff]

yung h100 namin medyo mausok na din kahit katatapos lang ichange oil. nahuli nga kami kanina sa may c5 kalayaan for smoke belching ano ba dapat kong ipa check?

[garyq]

go!go!go doc diesel. Hinda pa ata sticky?

[jonvic]

Does using biodiesel help in delaying the need for calibration?

Thanks Doc Diesel! :thanx:

[ARB]

doc mga magkano plunger sa inyo na Zexel p49 or denso 4610? just replaced them on my truck, just wanted to compare the prices that I got them if malaki difference. cant call your manila office province ako eh.