Diesel Fuel Injection System Help Desk

**Dieseldude** · September 2nd, 2011 09:46 AM

sir dieseldude, kung inilalagay yung rpm 750 na may load na aircon which is ito naman ang naka lagay na normal idling, yun na nag wawala na ang engine. Paano nag wawala ang engine kung nailalagay mo ang rpm sa 750?

pero kung ibinababa naman sa 650 na may load na aircon hindi na nagwa wild. pero pag walang load na aircon ok at ang ganda ng andar ng makina patri ang hatak ok.. salamat po sa reply nyo kanina. sana po matulungan nyo ako. Gusto kita tulungan pero do ko maintindihan ang post mo.

**Dieseldude** · September 2nd, 2011 09:55 AM

Oops. Sorry sir. 4HG1. had a talk with the driver-operator recently. the unusual smoking and sluggish power occured after filling-up with diesel. drained the fuel filter-separator. still there is white smoke. I suspect a water contamination problem with the fuel station. will fill up again another batch of diesel and see what happens. This is a correct next step before considering any repairs.

no previous work done on the vehicle except the regular oil and filters(oil, air, fuel) replacement. it was a surplus unit and running for 2 years now. the problem occured last week. Your problem seems to be fuel related. Keep us posted as your experience may help other Tsikoters.

thank you sir You're welcome.

**junver** · September 2nd, 2011 01:59 PM

Sir dieseldude,

good day po!

4ja1 engine po, pag bagong, start palang ang makina na medyo malamig pa at naka on ang aircon, ok naman ang idling,

pero, pag mainit na ang engine , bumababa na ang rpm at lumalakas ang vibration.

Pero kung hindi naka on ang aircon ok naman ang idling, at hatak ng makina.

Ano po kaya ang problema ng makina ko? May kinalaman po kaya ito sa injection pump?

Kung malapit lang sana ako dyan sa shop nyo, punta ka agad ako dyan. Alam ko naman po na matutulungan nyo ako. Kaya lang po dito ako sa leyte province region 8.

Thanks in advance and god bless.

Junver

**Dieseldude** · September 4th, 2011 06:01 PM

Sir dieseldude,

good day po!

4ja1 engine po, pag bagong, start palang ang makina na medyo malamig pa at naka on ang aircon, ok naman ang idling. Pero, pag mainit na ang engine , bumababa na ang rpm at lumalakas ang vibration. Pero kung hindi naka on ang aircon ok naman ang idling, at hatak ng makina.
Meron bang ginalaw sa engine mo bago lumabas itong problem?

Ano po kaya ang problema ng makina ko? May kinalaman po kaya ito sa injection pump? Mukhang ok ang injection pump.
1) Recheck idle adjustment and idle-up device.
2) Check amount of refrigerant loaded on aircon; baka sobra. Check low and high side pressure of aircon.
3) Verify any previous work performed on the engine.

Kung malapit lang sana ako dyan sa shop nyo, punta ka agad ako dyan. Alam ko naman po na matutulungan nyo ako. Kaya lang po dito ako sa leyte province region 8.

Thanks in advance and god bless. You are welcome.

Junver

**miked** · September 5th, 2011 11:16 AM

Originally Posted by Dieseldude

Oops. Sorry sir. 4HG1. had a talk with the driver-operator recently. the unusual smoking and sluggish power occured after filling-up with diesel. drained the fuel filter-separator. still there is white smoke. I suspect a water contamination problem with the fuel station. will fill up again another batch of diesel and see what happens. This is a correct next step before considering any repairs.

no previous work done on the vehicle except the regular oil and filters(oil, air, fuel) replacement. it was a surplus unit and running for 2 years now. the problem occured last week. Your problem seems to be fuel related. Keep us posted as your experience may help other Tsikoters.

thank you sir You're welcome.

sir DD,

still on the process of consuming the previous diesel fuel. about 3/4 fuel left as of this writing as the vehicle is not usually used. on the average, about once a week. could this frequency of use contribute to the problem as the injection pump is not usually "exercised and lubricated" by diesel?

to add up some info. with the truck not running (engine on), blipping the throttle produces a combination of severely white and not so severe black smoke with the engine running roughly.

thank you sir.

**Dieseldude** · September 5th, 2011 02:05 PM

sir DD,

still on the process of consuming the previous diesel fuel. about 3/4 fuel left as of this writing as the vehicle is not usually used. on the average, about once a week. could this frequency of use contribute to the problem as the injection pump is not usually "exercised and lubricated" by diesel? Rapid pump failure can happen if water is present in your fuel. Quality of clean diesel fuel deteriorates over time due to bacterial growth and accumulation of moisture. As a safe rule, diesel fuel should be disposed of if stored for more than 8 months. Try this: put fresh diesel fuel in a small container, connect your fuel suction and return lines to this container, and run your engine. If performance improves, then you know that your problem is due to a fuel quality issue.

to add up some info. with the truck not running (engine on), blipping the throttle produces a combination of severely white and not so severe black smoke with the engine running roughly. Check pump timing, valve clearances, and air intake system for restriction. You can also bring your van to a qualified diesel workshop.

thank you sir.

**miked** · September 7th, 2011 10:32 AM

Originally Posted by Dieseldude

sir DD,

still on the process of consuming the previous diesel fuel. about 3/4 fuel left as of this writing as the vehicle is not usually used. on the average, about once a week. could this frequency of use contribute to the problem as the injection pump is not usually "exercised and lubricated" by diesel? Rapid pump failure can happen if water is present in your fuel. Quality of clean diesel fuel deteriorates over time due to bacterial growth and accumulation of moisture. As a safe rule, diesel fuel should be disposed of if stored for more than 8 months. Try this: put fresh diesel fuel in a small container, connect your fuel suction and return lines to this container, and run your engine. If performance improves, then you know that your problem is due to a fuel quality issue.

to add up some info. with the truck not running (engine on), blipping the throttle produces a combination of severely white and not so severe black smoke with the engine running roughly. Check pump timing, valve clearances, and air intake system for restriction. You can also bring your van to a qualified diesel workshop.

thank you sir.

thank you sir. i'll do your suggestion of using a container with fresh diesel. will update soon.

**miked** · September 8th, 2011 01:41 PM

sir DD, i have to conclude that it was water contamination. truck runs normally as of now. it was used daily this week. the water at the bottom of the tank maybe consumed already. thanks

**Dieseldude** · September 8th, 2011 11:27 PM

Originally Posted by miked

sir DD, i have to conclude that it was water contamination. truck runs normally as of now. it was used daily this week. the water at the bottom of the tank maybe consumed already. thanks

You are welcome......

By the way, your unit probably has a WIF sensor below the fuel filter/sedimentor and an indicator lamp on the dash. Check/repair this to prevent costly fuel injection repairs.