Diesel Fuel Injection System Help Desk

**miked** · January 30th, 2012 12:00 PM

Sir Dieseldude,

is it safe to jump 12V direct from the battery to the fuel cut solenoid valve of the injection pump? just askin in case an electrical gremlin happens to occur with the pump wiring....TIA

**Dieseldude** · January 30th, 2012 12:15 PM

Originally Posted by kramterrag

*Sir Dieseldude,

I have a N/A 4JB1 engine po, meron po bang engine-mods for it? Turbo kit? Any suggestions po for modding my unit and how much will it cost?

thanks!

We don't do mods for this engine. And I suggest that you keep it stock.

**Dieseldude** · January 30th, 2012 12:19 PM

Originally Posted by miked

Sir Dieseldude,

is it safe to jump 12V direct from the battery to the fuel cut solenoid valve of the injection pump? just askin in case an electrical gremlin happens to occur with the pump wiring....TIA

Yes it is safe. Jump +12V to the solenoid terminal. Solenoid housing is grounded to -12V.

**atty_facedrop** · January 31st, 2012 03:59 PM

HI po mga master,

Di ko po alam kung tama itong pag post ko pero I really wish that you geniuses could advise me what to do.

My ride is an import Pajero, boxtype, 4d56 engine.

Newly overhauled po so within breakin period pa.

My problems are:

1) im hearing a knocking sound coming from the engine compartment;

2) i know its just the break in period, but when I took the SCTEX going to manila from zambales... my ride was having a hard time climbing the not so steep inclines thereat;

My dad (which has a bit more experience with diesel engines than me) said that it is fuel knock.

My ride already has this problem before it was overhauled. I just want to fix the problems of my ride 1 by 1 so that it would eventually be fantastic.

PS: I read in one of the threads that "petron power booster" is good in reducing if not totally eliminating the knocking sound... so please can anyone advice me on all of the above.

Thanks in advance

**Dieseldude** · February 1st, 2012 01:37 AM

Di ko po alam kung tama itong pag post ko pero I really wish that you geniuses could advise me what to do.
My ride is an import Pajero, boxtype, 4d56 engine. Newly overhauled po so within breakin period pa. My problems are:

1) im hearing a knocking sound coming from the engine compartment;

What did your mechanic have to say about this? He will be in the best position to advise you as he overhauled your engine.

2) i know its just the break in period, but when I took the SCTEX going to manila from zambales... my ride was having a hard time climbing the not so steep inclines thereat.

Did you have your fuel injection system serviced while the engine was being overhauled?

My dad (which has a bit more experience with diesel engines than me) said that it is fuel knock.

He could be right.

My ride already has this problem before it was overhauled. I just want to fix the problems of my ride 1 by 1 so that it would eTentually be fantastic.

There was no improvement after the overhaul?

PS: I read in one of the threads that "petron power booster" is good in reducing if not totally eliminating the knocking sound... so please can anyone advice me on all of the above.

Petron power booster can help. But this is masking the problem, not fixing the problem. A good engine should run well without aid from any additives.

Thanks in advance

You're welcome....

**atty_facedrop** · February 3rd, 2012 10:31 AM

Gud am again sensei dieseldude,

Di ko po alam kung tama itong pag post ko pero I really wish that you geniuses could advise me what to do.
My ride is an import Pajero, boxtype, 4d56 engine. Newly overhauled po so within breakin period pa. My problems are:

1) im hearing a knocking sound coming from the engine compartment;

What did your mechanic have to say about this? He will be in the best position to advise you as he overhauled your engine.

(He said that my engine sounds fine... If i want to eliminate the knocking sound, I should have my injection system serviced.)

2) i know its just the break in period, but when I took the SCTEX going to manila from zambales... my ride was having a hard time climbing the not so steep inclines thereat.

Did you have your fuel injection system serviced while the engine was being overhauled?

(Not yet... I would if it is already needed.)

My dad (which has a bit more experience with diesel engines than me) said that it is fuel knock.

He could be right.

My ride already has this problem before it was overhauled. I just want to fix the problems of my ride 1 by 1 so that it would eTentually be fantastic.

There was no improvement after the overhaul?

(There was. The black smoke was reduced but not eliminated there's still heavy black smoke when im climbing inclines and when im about to accelerate from a full stop... but the torque did not improve, in fact i think it lost a little.)

PS: I read in one of the threads that "petron power booster" is good in reducing if not totally eliminating the knocking sound... so please can anyone advice me on all of the above.

Petron power booster can help. But this is masking the problem, not fixing the problem. A good engine should run well without aid from any additives.

(As of now... I dont have the funding yet for servicing my injection system... is "petron power booster" a good bandaid solution... and can I use it even if my ride is still in the break-in period?)

Thanks in advance

You're welcome.... (you are really GOD SENT master diesel dude) tnx again

**Dieseldude** · February 5th, 2012 12:46 AM

Gud am again sensei dieseldude,

Di ko po alam kung tama itong pag post ko pero I really wish that you geniuses could advise me what to do.
My ride is an import Pajero, boxtype, 4d56 engine. Newly overhauled po so within breakin period pa. My problems are:

1) im hearing a knocking sound coming from the engine compartment;

What did your mechanic have to say about this? He will be in the best position to advise you as he overhauled your engine.

(He said that my engine sounds fine... If i want to eliminate the knocking sound, I should have my injection system serviced.)
BEFORE DOING THIS, CHECK PUMP TO ENGINE TIMING.

2) i know its just the break in period, but when I took the SCTEX going to manila from zambales... my ride was having a hard time climbing the not so steep inclines thereat.

Did you have your fuel injection system serviced while the engine was being overhauled?

(Not yet... I would if it is already needed.)

My dad (which has a bit more experience with diesel engines than me) said that it is fuel knock.

He could be right.
FUEL KNOCK IS OFTEN DUE TO WRONG TIMING OR FAULTY INJECTOR/S.

My ride already has this problem before it was overhauled. I just want to fix the problems of my ride 1 by 1 so that it would eTentually be fantastic.

There was no improvement after the overhaul?

(There was. The black smoke was reduced but not eliminated there's still heavy black smoke when im climbing inclines and when im about to accelerate from a full stop... but the torque did not improve, in fact i think it lost a little.)
CHECK AIR FILTER AND PUMP TIMING.

PS: I read in one of the threads that "petron power booster" is good in reducing if not totally eliminating the knocking sound... so please can anyone advice me on all of the above.

Petron power booster can help. But this is masking the problem, not fixing the problem. A good engine should run well without aid from any additives.

(As of now... I dont have the funding yet for servicing my injection system... is "petron power booster" a good bandaid solution... and can I use it even if my ride is still in the break-in period?)
YES, AS LONG AS YOU FOLLOW THE RECOMMENDED MIX/CONCENTRATION.

Thanks in advance

You're welcome.... (you are really GOD SENT master diesel dude) tnx again
GOOD LUCK!!!

**ollopasagla** · February 6th, 2012 05:18 PM

Hi,
2.8 Pajero 98, JDM, 4m40 automatic with 180,000 mileage.
Sirs, May humahalong oil sa fuel kaya ang itim ng crudo sa fuel tank, mahina rin ang power.
Ano kaya problem ? thanks...

Ollopasagla

**Dieseldude** · February 7th, 2012 01:44 AM

Hi,
2.8 Pajero 98, JDM, 4m40 automatic with 180,000 mileage.
Sirs, May humahalong oil sa fuel kaya ang itim ng crudo sa fuel tank, mahina rin ang power.
Hard starting din ba sa umaga?

Ano kaya problem ?
Malamang injection pump ang problem...

thanks...

Ollopasagla