Diesel Fuel Injection System Help Desk

**r_delro** · October 21st, 2011 12:14 AM

Sir, hingi lang po ako ng advise. This is regarding our toyota innova 2008 d4d a/t. May smoke belching problem po siya. I brought it to the dealership twice na. The first time, they cleaned the egr, exhaust and intake manifolds, and exhaust pipes. I had to pay 3,000. SA told me not covered by warranty because it is part of maintenance After a month or so, the problem recurred. I brought it back last July before warranty ended. They changed the egr and the injector o-ring no charge. Now, the problem is recurring though not that severe. Am now hesistant to bring it back to casa because of the long wait of 2 weeks per service and fruitless diagnosis and solution. Sir, what may be the problem and solution to my vehicle? How much would be for diagnosis for this? Thank you.

**Dieseldude** · October 21st, 2011 11:32 PM

Sir, hingi lang po ako ng advise. This is regarding our toyota innova 2008 d4d a/t. May smoke belching problem po siya. Black or white smoke? Happens only at early morning starts? Smokes when the engine is cold, hot, or both? Power is good?

I brought it to the dealership twice na. The first time, they cleaned the egr, exhaust and intake manifolds, and exhaust pipes. I had to pay 3,000. SA told me not covered by warranty because it is part of maintenance After a month or so, the problem recurred. I brought it back last July before warranty ended. They changed the egr and the injector o-ring no charge. Now, the problem is recurring though not that severe. Am now hesistant to bring it back to casa because of the long wait of 2 weeks per service and fruitless diagnosis and solution. Two weeks is too long.

Sir, what may be the problem and solution to my vehicle? How much would be for diagnosis for this? Thank you. Answer my questions, and I may be able to help you.

**r_delro** · October 22nd, 2011 01:26 PM

Sir dieseldude, black yung smoke. There is always black smoke. It's more prominent in the mornings and evenings. No problem with engine power. There is one thing i forgot to mention. There is always a thick residue of black soot in the exhaust. When i try to remove it, its flakey. After a few drives after cleaning, returns to thick soot. Thanks sir dieseldude for the advise.

**Dieseldude** · October 23rd, 2011 11:12 AM

Originally Posted by r_delro

Sir dieseldude, black yung smoke. There is always black smoke. It's more prominent in the mornings and evenings. No problem with engine power. There is one thing i forgot to mention. There is always a thick residue of black soot in the exhaust. When i try to remove it, its flakey. After a few drives after cleaning, returns to thick soot. Thanks sir dieseldude for the advise.

I suggest the ff:

1) Check/replace air filter
2) Check EGR again
3) Check injectors
4) Check turbo

**crazy_boy** · October 23rd, 2011 11:40 AM

Originally Posted by Dieseldude

I suggest the ff:

1) Check/replace air filter
2) Check EGR again
3) Check injectors
4) Check turbo

diesel dude, when cleaning the EGR, do we clean the valve itself only or we should go as far as removing to exhaust manifold and the pipes connected to the EGR and clean it?

**Dieseldude** · October 23rd, 2011 01:59 PM

Originally Posted by crazy_boy

diesel dude, when cleaning the EGR, do we clean the valve itself only or we should go as far as removing to exhaust manifold and the pipes connected to the EGR and clean it?

Clean only the EGR. You don't have to remove/clean the exhaust manifold.

**r_delro** · October 23rd, 2011 09:40 PM

Originally Posted by Dieseldude

I suggest the ff:

1) Check/replace air filter
2) Check EGR again
3) Check injectors
4) Check turbo

Sir, air filter has been recently replaced. The egr was replaced last july. Kung sa inyo(central diesel) how much would it probably cost to diagnose and repair? How long would it take? Mga estimate lang po. Thanks for the help.

**crazy_boy** · October 24th, 2011 07:59 AM

Originally Posted by Dieseldude

Clean only the EGR. You don't have to remove/clean the exhaust manifold.

dieseldude, i mean intake manifold. since most of the time, if the egr is dirty, the intake manifold will be full of carbon gunk too right?

**Dieseldude** · October 25th, 2011 08:34 AM

Originally Posted by crazy_boy

dieseldude, i mean intake manifold. since most of the time, if the egr is dirty, the intake manifold will be full of carbon gunk too right?

You are right crazt_boy. Cleaning the intake manifold would be good.

**Dieseldude** · October 25th, 2011 09:13 AM

Originally Posted by r_delro

Sir, air filter has been recently replaced. The egr was replaced last july. Kung sa inyo(central diesel) how much would it probably cost to diagnose and repair? How long would it take? Mga estimate lang po. Thanks for the help.

I will PM you.

This is how repairs are often done:
1) Do a scan and perform repair on any detected fault/s. Fyi, Scan tools can only detect electronically related faults. Most mechanical problems cannot be seen by a scan tool.
2) If no fault/s are detected, it is very possible that the problem is mechanical in nature. This is the more difficult part as the mechanic has no fault code to guide him. He will have to check all possibilities. This takes a lot of time and effort.

The hard part is locating the problem. Once the faulty part is identified, it is now just a matter of doing the corrective action. Your problem could more difficult to diagnose/repair as Toyota has twice worked on your car with no success.