Diesel Fuel Injection System Help Desk

[RustyXIII]

good day again sir DD,

just recently, my 4d56 turbodiesel cuts out when accelerated suddenly or when revved constantly at high rpm.....ang nangyari is below empty na yung gage, kinargahan ko 2T (about 50 ml) then drive 10 km to the gas station. tried to overtake then engine suddenly cuts out. suspected it was air in the lines (due to low fuel level), but after filling up the tank still cuts out at sudden acceleration and constant high rpms about 3-5 times on our trip dito sa province. been a user of 2T months before fyi.

changed my fuel filter last october at napansin ko days after the filter change e nagjejerk ang engine when throttle is released suddenly from a high rpm but doesn't jerk if throttle is released relatively slow.

observed too that the engine feels a little sluggish.

is this a simple air entering the fuel system problem? i hope that the injection pump won't give up the ghost yet,

would a soft hose connecting the tank to the water separator-filter assembly contribute to the problem?

thanks in advance dude!!!!

Have you sorted this out? If not, the following might help...

I too experienced stalling with my Adventure (also 4D56). I started to notice that it barely reaches 100KpH on the expressways, whereas it could reach 140KpH before. Nawalan ng rekta pero may hatak pa rin naman. DD advised checking throttle cable and changing fuel filter. Cable adjustment was fine. Changed fuel filter.

It was then that I experienced stalling. Lumala ang problema. Found out later that it was something I did earlier that caused it.

Mechanic 1 thought air was getting into the lines and suggested changing the priming pump. The solution was thankfully simpler and less expensive. Mechanic 2 suspected clogged lines. We pulled down the tank and cleaned it. Strainer had some sand (?) in it. Also removed a small strainer/filter in the injection pump located in the "in" line where fuel enters the pump. It's small and made of wire mesh. Cleaned it with thinner and compressed air. After we put everything back, she was back to her old self. Parang nagdahilan lang.

Like you, I also let the fuel level get tool low - up to the point where the warning light stays on. Maybe your pump sucked up dirt and got clogged.

[Dieseldude]

Sir,

What's your take on the Bosch CRDi system Foton uses on their 4JB1 turbo motors? Have you had any experience with them already? Anything to watch out for? Are they expensive to service?

The View passenger van is available only with the CRDi engine variant.

I haven't seen a Foton, and have no experience on this vehicle. Things to watch out for would be the CRDI system installed.......is it a Bosch. Denso, or a China system.

I would next look at riding comfort and noise level. Without mentioning vehicle brand/s, I've seen some new China vehicles with excessive vibration and unwanted in-cab noise. Some even had poor transmission gear ratios.

Best thing is to test drive the vehicle.

[Dieseldude]

Have you sorted this out? If not, the following might help...

I too experienced stalling with my Adventure (also 4D56). I started to notice that it barely reaches 100KpH on the expressways, whereas it could reach 140KpH before. Nawalan ng rekta pero may hatak pa rin naman. DD advised checking throttle cable and changing fuel filter. Cable adjustment was fine. Changed fuel filter.

It was then that I experienced stalling. Lumala ang problema. Found out later that it was something I did earlier that caused it.

Mechanic 1 thought air was getting into the lines and suggested changing the priming pump. The solution was thankfully simpler and less expensive. Mechanic 2 suspected clogged lines. We pulled down the tank and cleaned it. Strainer had some sand (?) in it. Also removed a small strainer/filter in the injection pump located in the "in" line where fuel enters the pump. It's small and made of wire mesh. Cleaned it with thinner and compressed air. After we put everything back, she was back to her old self. Parang nagdahilan lang.

Like you, I also let the fuel level get tool low - up to the point where the warning light stays on. Maybe your pump sucked up dirt and got clogged.

Thanks for posting your fix. This can help other Tsikoters who have a similar problem

[OTEP]

I haven't seen a Foton, and have no experience on this vehicle. Things to watch out for would be the CRDI system installed.......is it a Bosch. Denso, or a China system.

I would next look at riding comfort and noise level. Without mentioning vehicle brand/s, I've seen some new China vehicles with excessive vibration and unwanted in-cab noise. Some even had poor transmission gear ratios.

Best thing is to test drive the vehicle.

The system is a Bosch branded system. Everything from the computer box to the injectors has Bosch logos on them. Are these systems reliable and easy to fix should anything go wrong?

I've test driven the unit. The extra long wheelbase (even longer than the View ambulance) really helps soak up the bumps. Vibration is a bit high. Sort of like riding a Crosswind. Shifter feel is not very sporty but tolerable.

[Dieseldude]

The system is a Bosch branded system. Everything from the computer box to the injectors has Bosch logos on them. Are these systems reliable and easy to fix should anything go wrong?

I've test driven the unit. The extra long wheelbase (even longer than the View ambulance) really helps soak up the bumps. Vibration is a bit high. Sort of like riding a Crosswind. Shifter feel is not very sporty but tolerable.

Bosch systems are reliable. Offhand, I would say that this common rail system can be repaired. But to be sure, I need to see this car to get more info like part numbers and availability of diagnostic software.

Another important matter to consider is dealer support.......... if and when the vehicle fails.

[OTEP]

The engine is a clone of the Isuzu 4JB1-TC, btw. But the CRDi system is from Bosch.

The body of the van is a super long wheelbase, standard roof clone of an older model Toyota Hiace.

Support seems to be available so far. At least here in Metro Manila. The PCSO got 375 non-CRDi Foton Views to be given out as ambulances.

[miked]

Have you sorted this out? If not, the following might help...

I too experienced stalling with my Adventure (also 4D56). I started to notice that it barely reaches 100KpH on the expressways, whereas it could reach 140KpH before. Nawalan ng rekta pero may hatak pa rin naman. DD advised checking throttle cable and changing fuel filter. Cable adjustment was fine. Changed fuel filter.

It was then that I experienced stalling. Lumala ang problema. Found out later that it was something I did earlier that caused it.

Mechanic 1 thought air was getting into the lines and suggested changing the priming pump. The solution was thankfully simpler and less expensive. Mechanic 2 suspected clogged lines. We pulled down the tank and cleaned it. Strainer had some sand (?) in it. Also removed a small strainer/filter in the injection pump located in the "in" line where fuel enters the pump. It's small and made of wire mesh. Cleaned it with thinner and compressed air. After we put everything back, she was back to her old self. Parang nagdahilan lang.

Like you, I also let the fuel level get tool low - up to the point where the warning light stays on. Maybe your pump sucked up dirt and got clogged.

nasort out na dude....after the filter change, i changed also the fuel hoses (suction, feed, return). it was a loose clamp holding the return hose to injection pump. plus a timing belt and tensioner replacement too. so far so good.

[V!S]

Sorry mga Bro, maybe its posted here, but sa haba na ng thread di ko na mabasa lahat.

I will try to visit a shop tom for my fuel injection. lagi kasing mainit yung l200 ko sa ASBU.

any recommended shop na hindi naman kataasan maningil.

I have it done last year but tingin ko humina yung hatak and now maitin ulit yung usok. hindi ko na maalala ano un pinalitan and ano yung hindi. worry ko kasi yung ibang shop sasabihin palitin na pero hindi pa pala. ang mahal pala ng pyesa kapag nag papa calibrate.

Can I have your no. Dieseldude. san ba yung shop nyo.

thanks.

[Dieseldude]

Sorry mga Bro, maybe its posted here, but sa haba na ng thread di ko na mabasa lahat.

I will try to visit a shop tom for my fuel injection. lagi kasing mainit yung l200 ko sa ASBU.

any recommended shop na hindi naman kataasan maningil.

I have it done last year but tingin ko humina yung hatak and now maitin ulit yung usok. hindi ko na maalala ano un pinalitan and ano yung hindi. worry ko kasi yung ibang shop sasabihin palitin na pero hindi pa pala. ang mahal pala ng pyesa kapag nag papa calibrate.

Can I have your no. Dieseldude. san ba yung shop nyo.

thanks.

Check/replace air filter.

[junver]

Sir dieseldude,

good day po! Tanong lang po
ano po masasabi nyo sa 2t oil and diesel fuel combination?
Ano po ba ang magiging epekto nito sa injection pump, injectors at sa makina? PARTICULAR SA ISUZU 4JA1 ENGINE.
Kasi po they claim na naging smoother and less vibration ang engine.

Salamat po and God bless.

[Dieseldude]

Sir dieseldude,

good day po! Tanong lang po
ano po masasabi nyo sa 2t oil and diesel fuel combination?
Ano po ba ang magiging epekto nito sa injection pump, injectors at sa makina? PARTICULAR SA ISUZU 4JA1 ENGINE.
Kasi po they claim na naging smoother and less vibration ang engine.

Salamat po and God bless.

Hindi ko pa nasubukan ang 2T oil.
Pero dapat malaman mo ang ideal mix kung gusto mong subukan.

[redlandcrusher]

Hey Dieseldude,

I have a '96 local landcruiser 1hd-t engine, and its already 437000 km. I got it from my dad in the province and as far as I know the injectors have never been serviced before.

I'm thinking of having the injectors cleaned since its been that long already but I'm not sure if it really needs it. The power seems good and the only problem I've had was that I have to halfway press the accelerator whenever I start the engine or else it'll have a hard time starting. Should I have it cleaned nonetheless or "if it ain't broke, don't fix it" applies?

Thanks and btw, how much do you charge for 1hd-t injector cleaning? Thanks :D

[raquino]

had MIL and the DTC showed fuel pressure regulator. DTC cleared and no more MIL. Do I need to replace the Fuel pressure regulator? my ride is captiva vcdi.

[Dieseldude]

Hey Dieseldude,

I have a '96 local landcruiser 1hd-t engine, and its already 437000 km. I got it from my dad in the province and as far as I know the injectors have never been serviced before. I'm thinking of having the injectors cleaned since its been that long already but I'm not sure if it really needs it. At 437k kms, nozzles will most probably need replacement.

The power seems good and the only problem I've had was that I have to halfway press the accelerator whenever I start the engine or else it'll have a hard time starting. This could be due to a faulty injection pump, etc...

Should I have it cleaned nonetheless or "if it ain't broke, don't fix it" applies? This is how I see it: Worn parts should be replaced.... not cleaned. Your injectors/nozzles have 437K kms on them. Cleaning can work on low mileage nozzles. If you don't want to spend, don't touch the injectors.

Thanks and btw, how much do you charge for 1hd-t injector cleaning? Thanks. I cannot recall how much. 1HDTs use dual spring injectors, which require a lot more service steps. So repair charges for these are higher than regular single spring injectors. Pls call the office. I'm now away on diesel training.

[Dieseldude]

had MIL and the DTC showed fuel pressure regulator. DTC cleared and no more MIL. Do I need to replace the Fuel pressure regulator? my ride is captiva vcdi.

If DTC was cleared and engine performance is back to normal, there is no need to replace any part.

However, you should know why that fault was logged. If it is an intermittent problem, fault could occur again......anytime while your on the road. Intermittents are very difficult to diagnose.

[raquino]

If DTC was cleared and engine performance is back to normal, there is no need to replace any part.

However, you should know why that fault was logged. If it is an intermittent problem, fault could occur again......anytime while your on the road. Intermittents are very difficult to diagnose.

Thanks. My ride is back to normal. Casa wanted to replace the part but my wife didn't have it done cause it's too expensive. Ordered the part though from seiring which is a lot cheaper. Will just keep the part to have in stock so in case the fault recurrs, have the part ready with me.

[Dieseldude]

Thanks. My ride is back to normal. Casa wanted to replace the part but my wife didn't have it done cause it's too expensive. Ordered the part though from seiring which is a lot cheaper. Will just keep the part to have in stock so in case the fault recurrs, have the part ready with me.

Good. How much did the pressure regulator cost? Is this the part which is mounted at the end of the rail?

[raquino]

Good. How much did the pressure regulator cost? Is this the part which is mounted at the end of the rail?

Yes it's at the end of the rail. It cost like 5K ordered thru Seiring. Casa cost almost 3 times more. Ordered from Korea and it will arrive with their other orders in 3-4 weeks. At least this way I have the regulator in case I need it rather than getting from the casa which is too expensive.

[Dieseldude]

Yes it's at the end of the rail. It cost like 5K ordered thru Seiring. Casa cost almost 3 times more. Ordered from Korea and it will arrive with their other orders in 3-4 weeks. At least this way I have the regulator in case I need it rather than getting from the casa which is too expensive.

Good for you. And thanks for the tip about Seiring.

[joedreamerz]

Hello ask ko lang. im wondering bakit yung mga sasakyan ng mga isuzu mausok, lagi kasi huli ng smoke belching. anu bang best way para hindi mahuli. kaka pagawa ko lang ng injection pump and replace injectors huli pa din. anu kaya magandang solusyon. lalo na sa makati matindi kung makatapak bagsak cgurado lagi. may ways ba para hindi mahuli