Hi everyone. I am pleasantly surprised to see such an active forum on the auto scene in India. My post is regarding the G2 (diesel) Innova that I bought in Sep 05. To begin with I was really happy with my choice. There was a silky smoothness about the diesel engine and the car seemed like a big beast under your control. After about 2 months, towards the end of October, I started noticing a degradation in performance. The smoothness seemed to have vanished and the vehicle started feeling like the typical diesel that we are used to. To make matters worse I noticed a drop in power while accelerating and on occasions I was sure that the vehicle actually missed. I have been very careful with my choice of pumps while topping up and had been always using Turbojet from HP as my fuel. When I took the car in for a checkup at the dealer, I was told that there is nothing wrong with it and that adulterated diesel must be the culprit. Just to be sure I switched over to a different pump and got Hi-Speed diesel filled for the first time. There was some little improvement in the drive quality but far from what I had experienced in the early days. I just reconciled to the fact that the pleasure rush that I had experienced in the first two months was due to the car being brand new and what I have now is what I have to live with. Anyways, while driving on the Noida expressway one day, I suddenly noticed a big cloud of black smoke in my rear view mirror. I was quite zapped and when I got down to check things I realised that my back bumper and number plate were coated in black soot. I suddenly recalled that my brother-in-law who had been following my car once, had remarked that it was belching out black smoke but at that point of time it did not mean much to me. I immediately took the car to the dealer and here the story starts to become interesting. I was initially told by the dealer that they have received complaints of excessive black smoke from about 13-14 other Innovas and that Toyota is aware of the problem and that they are working on a solution. Apparently, since I was driving at a high speed on the expressway, the increased acceleration had ejected the accumulated carbon deposit from my exhaust and hence the sudden cloud of black smoke. When I was persistent, the guy dealing with me took my car to their yard and accelerated it hard to see the problem for himself. The smoke that came out seemed enough to paint their entire boundary black. I was just horrified, to say the least. I was then directed to their service manager who told me that this problem was indeed widespread and that Toyota is planning to change some parts in the cars that they have already sold. I was also told the following precautions need to be taken:
1. To use "normal" diesel without any additives which rules out all of the premium diesels like Turbojet, etc. Supposedly CRDi engines don't appreciate these premium diesels. I was even told that Hyundai is changing the entire CRDi system in their Ascents because of similar problems being faced by them.
2. To rev my car hard 10 times once a week so that all accumulated carbon deposits get released from my exhaust pipe.
Having said that they took my car into their workshop and supposedly cleaned the accumulated carbon deposit. I was once again told to be patient and wait for Toyota to make up their minds about what they need to do to solve the problem. Most probably my car will be recalled for some change in parts.
The first thing that I did was drive to one of the "company owned" Indian Oil pumps, close by, and get "normal" diesel filled in my car. To be honest, in a day or two, I did experience an improvement in the drive quality - the zing in my car was back somewhat. It was again smooth and there were no power drops while accelerating. Was this because of the fact that the carbon that had been choking my engine had been cleaned by the dealer or was it because of the "normal" diesel coursing through the veins of my fussy CRDi engine - I couldn't figure out. Meantime, I shot of a mail to Toyota, detailing my situation for which I am yet to receive any reply. What I did receive was a call from Toyota Bangalore and the sweet lady on the other end acknowledged that a problem does exist and that Toyota would be changing some parts by January end to fix it. Meantime I need to use "normal" diesel and that will control the problem somewhat. It was also emphasised that this was an emission problem only and that it does not affect the engine life or performance in any way. I did weakly try to tell her that I had experienced a severe drop in my drive quality in this period but somehow could not get my point across very well. Well, when I organised my thoughts after the phone call, I reasoned that my car was driving reasonably OK and maybe I can turn a blind eye towards the black smoke for some time. I would have been happy with the situation but in a few days since this episode, my car's performance has again taken a nose dive. Is it because of the carbon that has again started accumulating inside? - I can't be sure. In dismay, I searched the net for similar experiences that other people may have had and I stumbled upon this thread in one of the car forums in Philippines.
http://tsikot.yehey.com/forums/showt...ghlight=innova
There are some 150 posts in this thread titled "Toyota D4D engine woes" which contain horror stories of diesel Innovas stalling. It seems that the problem there stems from a faulty fuel pump and that Toyota is already replacing the same in several vehicles there. It also seems that Toyota has not released the diesel version of Innova in some countries because of concerns regarding its reliability.
My concerns are as follows:
- Is there more to the problem then meets the eye? Are we talking of an emission problem only or is there something more serious like in Philippines. Since Toyota's IMV project of which Innova is a part, is about using the same parts in vehicles manufactured under it all over the world, to cut down costs, do we also have the same faulty fuel pump in our cars which is starting to act up now by causing black smoke and will one day cause more serious problems?
- If it is indeed an emission problem only, how do we explain the performance drop I have been experiencing? I would rule out fuel quality in my case, since like I pointed out earlier, I have been getting fuel filled from reliable pumps only. Excessive black smoke means excessive carbon deposit and doesn’t carbon deposit clog the fuel injectors, the fuel and air filters, resulting in wear-tear and reduced performance?
- Do CRDi engines actually don't appreciate premium additive laden diesels? I am quite reluctant to use "cheaper" diesel in my brand new vehicle and loose out on the advantages offered by the premium diesels now available. As a matter of fact, after reading the qualities of Hi-Speed diesel on BP’s website, it seems exactly like what the doctor would have prescribed. It reduces carbon deposit, results in better fuel combustion, results in better pickup…..
- Has Hyundai actually changed the CRDi system on their Ascent model to counter similar problems?
I apologise for the long post but I was wanting to detail the whole situation so that I can get relevant feedback from others, in this regard. I am also hoping that if I am not alone in facing these problems, then ultimately this post will trigger more people to come forward and Toyota will have to act decisively on these issues. I have no complaints with regards to their service and I appreciate the way the dealer acted and the fact that I received a call from someone in Bangalore to reassure me. What pains me is that I paid good money for a premium car from a premium car maker and I am having to undergo this mental agony of not knowing what is wrong with it.
I will now await the feedback of all the good people in this forum.