Diesel Fuel Injection System Help Desk

**nhk61** · January 2nd, 2009 11:31 AM

hi, dieseldude

i have a pajero 97, at start when you use it it's running fine till when you're going on an inclined road like going to tagaytay, i feel that the engine is losing power and dark smoke apprears from the exhaust......

needs to shift to a lower gear.......

the air filter is clean, is there something needs to be checked or adjusted....

thanks....

**Dieseldude** · January 2nd, 2009 07:48 PM

hi, dieseldude

i have a pajero 97, at start when you use it it's running fine till when you're going on an inclined road like going to tagaytay, i feel that the engine is losing power and dark smoke apprears from the exhaust......
Slight smoke and some power loss is quite normal when going to Tagaytay as this is an uphill road. Air density is also thinner due to the higher altitude. Excessive smoke is abnormal.

needs to shift to a lower gear.......
You do have to shift to a lower gear....

the air filter is clean, is there something needs to be checked or adjusted.
If you feel that the situation is not normal, EGR and/or turbo boost can be checked....

thanks....

**nhk61** · January 3rd, 2009 09:11 AM

Originally Posted by Dieseldude

hi, dieseldude

i have a pajero 97, at start when you use it it's running fine till when you're going on an inclined road like going to tagaytay, i feel that the engine is losing power and dark smoke apprears from the exhaust......
Slight smoke and some power loss is quite normal when going to Tagaytay as this is an uphill road. Air density is also thinner due to the higher altitude. Excessive smoke is abnormal.

it's strange to loose power, other cars and vehicles are passing me way ahead.

needs to shift to a lower gear.......
You do have to shift to a lower gear....

i have to shift cause even at 3rd gear it's even loosing power quite not normal.....

the air filter is clean, is there something needs to be checked or adjusted.
If you feel that the situation is not normal, EGR and/or turbo boost can be checked....

what's EGR?.....
thanks....

.......................................

**Dieseldude** · January 3rd, 2009 09:58 AM

EGR........ Exhaust Gas Recirculation

**nhk61** · January 4th, 2009 09:03 AM

Originally Posted by Dieseldude

EGR........ Exhaust Gas Recirculation

where is that located?

according to a service mechanic i've asked i might have to re-calibrate the diesel injection pump.......

will re-calibrating it fix the low power and smoke on an uphill road and give power back?

**Dieseldude** · January 4th, 2009 10:30 AM

where is that located? On the intake manifold.

according to a service mechanic i've asked i might have to re-calibrate the diesel injection pump....... He may be right. Faulty EGR and low boost presssure could also cause black smoke and a low power complaint. It is easier and cheaper to have these checked before opting for injection pump calibration. Has your mechanic checked these?

will re-calibrating it fix the low power and smoke on an uphill road and give power back? Yes, if you have a faulty injection system.

**carnibal** · January 6th, 2009 10:17 AM

Happy New Year!!!

I recently had my fuel system serviced: cleaned intake manifold, replaced air filter, cleaned injectors and replaced some seals of the injector pump.

The result: very clear exhaust... however, the vehicle seems to be losing power. can't climb a steep incline unlike before. when in a flat road, there is no problem as the van can manage high speeds with this. yung torque or pull factor ang kulang.

when in neutral the rpm is at about 1000rpm (quite high, normal is around), when gear is in Drive, rpm goes down to about 6500.

what seems to be the problem here? is it lacking diesel, but why is the rpm high when neutral if its lacking diesel?

would greatly appreciate your inputs

**rion** · January 6th, 2009 11:00 AM

Originally Posted by carnibal

Happy New Year!!!

I recently had my fuel system serviced: cleaned intake manifold, replaced air filter, cleaned injectors and replaced some seals of the injector pump.

The result: very clear exhaust... however, the vehicle seems to be losing power. can't climb a steep incline unlike before. when in a flat road, there is no problem as the van can manage high speeds with this. yung torque or pull factor ang kulang.

when in neutral the rpm is at about 1000rpm (quite high, normal is around), when gear is in Drive, rpm goes down to about 6500.

what seems to be the problem here? is it lacking diesel, but why is the rpm high when neutral if its lacking diesel?

would greatly appreciate your inputs

maybe they messed with the governor? I have seen many "diesel calibration shops" do this without basis. most of them just drop the setting and even drop the idle screw...

I have shared my painful experience on this, leading to an a/t disaster...

**Dieseldude** · January 6th, 2009 12:56 PM

Happy New Year!!!

I recently had my fuel system serviced: cleaned intake manifold, replaced air filter, cleaned injectors and replaced some seals of the injector pump. Why did you have the fuel injection system serviced? And what is the make and model of your car?

The result: very clear exhaust... however, the vehicle seems to be losing power. can't climb a steep incline unlike before. when in a flat road, there is no problem as the van can manage high speeds with this. yung torque or pull factor ang kulang.

when in neutral the rpm is at about 1000rpm (quite high, normal is around), when gear is in Drive, rpm goes down to about 6500. 650 maybe?

what seems to be the problem here? is it lacking diesel, but why is the rpm high when neutral if its lacking diesel? Pump / injectors may not be calibrated to specs...

would greatly appreciate your inputs. Claim warranty from the workshop who previously serviced your system. This is your best option. They should also be able show you the test specifications for your particular pump and injectors.

Calibration is basically adjusting the system to conform to factory-issued test specification. Without this info, everything becomes guesswork.

**sysop** · January 6th, 2009 07:41 PM

Good day sir! Ok lang po sa diesel engine ang sandaliang andar lang, para lang ba lumabas sa garahe kasi may ibang sasakyan na lalabas. Gaano po katagal painitin ang makina bago pwede na patakbuhin? At gaano din po katagal bago patayin? Pasensya na po, wala pa kasi alam sa diesel engine. plano pa lang po kasi bumili. Thanks in advance po!