Hello Fellow Pakwheelers,
I have been on PW for quite some time now albeit on the silent side using it mainly as a source of knowledge from our many expert members here. Loveable got me hooked on to Belta when he started this thread and Murtaza_murti paved the way for me to buy one myself once he started posting here and helping people out. This is a shout out to them and to all the other members who are helping turn n00bs in to experts by sharing all their knowledge selflessly and taking time out to answer queries.
In lieu of this I thought I would put up an interesting case of a problem with my Belta which might intrigue some of the experts here while helping anyone else out there who is facing the same issue. I will try to be as clear as possible:
Toyota Belta 2007 1.0L 1KR-FE
Imported 2010/Reg 2011
Mileage : 50k on the ODO
Perol, no CNG
There are two separate issues, since I`m not sure if they are related or not I will list them both out.
1. A couple of months ago the car parked in an open area at night and it was raining heavily. In the morning when I started the car a strange sound was emitting from the A/C vents. The sound only came when I revved the engine and it was kind of like the sound you hear when a pot of water boils. Like a bubbly water sound but only when I revved the engine. After revving the engine 4-5 times the sound disappeared. Since then the sound comes every time I start the car after a prolonged resting period such as when parked at night and dissipates after a few revs. It does not come when the car has been parked for only a couple of hours or so. Besides the sound there was no impact on the car otherwise, it was functioning normally.
2. This started happening about 1-2Months after the above issue. One day while on my way to the office in the morning, about 10 minutes in to the commute the car suddenly lost power, even with the accelerator pedal floored the car was vibrating heavily and not going above 30KM/Hr. I reached office, parked the car and went on about my day, in the evening when I started the car again to head back home, the same issue was there, the car was not going above 30KM/Hr. I took it to Honda Pit Stop where they examined the plugs, coils, air filter, air intake, cleaned the throttle body, opened the engine hub and manually checked the top of the pistons (not sure what they`re called) and hooked it up to the computer scanner and checked. None of this resolved or identified the issue. Then the fuel pump and filter was checked, the filter was replaced since they decided the pump was OK. The issue still remained. They say the only thing left to change now is the CVT fluid and if that fails then they are stumped.
I have reviewed the CVT change procedure as listed here by Omer Saleem in the DIY projects thread and see that many of the mistakes the mechanics make during the change were repeated by the Pit Stop staff when I asked them how they will do that, due to this I refrained from getting the CVT fluid changed as they were really just guessing.
The Symptoms: This ONLY happens when the car has been parked with the engine off for 1-2 Hours +. After driving the car for about 10-15 minutes the car becomes completely normal and the drive smooth as before.
1. When the car is started after resting for 1-2 Hours + you can hear the engine missing. During the first 5 minutes the car will stall if the accelerator is not pressed (as in the case of a CNG car if the "raise" is low and needs adjustments).
2. After 5 minutes the issue of the car stalling subsides, however the car jerks and won't go above 30-40KM even with the accelerator pedal floored. During this the engine will be doing a lot of "missing". The issue remains the same with or without the AC.
3. After approx. 10-15 minutes of driving the car will become completely normal and smooth.
4. The issue will be repeated once the car is park/off for 1-2Hours + even immediately following a driving session.
Since I showed the car to two different reputable workshops/mechanics and they couldn't diagnose the issue, I turn to my fellow Pakwheelers for help and advice.